./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.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 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 10:39:43,245 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 10:39:43,247 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 10:39:43,289 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 10:39:43,290 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 10:39:43,293 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 10:39:43,295 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 10:39:43,297 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 10:39:43,299 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 10:39:43,304 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 10:39:43,304 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 10:39:43,307 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 10:39:43,307 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 10:39:43,309 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 10:39:43,310 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 10:39:43,314 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 10:39:43,317 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 10:39:43,318 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 10:39:43,318 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 10:39:43,319 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 10:39:43,333 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 10:39:43,334 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 10:39:43,335 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 10:39:43,336 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 10:39:43,338 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 10:39:43,342 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 10:39:43,342 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 10:39:43,343 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 10:39:43,344 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 10:39:43,344 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 10:39:43,345 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 10:39:43,345 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 10:39:43,346 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 10:39:43,347 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 10:39:43,348 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 10:39:43,348 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 10:39:43,349 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 10:39:43,349 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 10:39:43,349 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 10:39:43,351 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 10:39:43,352 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 10:39:43,353 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 10:39:43,377 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 10:39:43,378 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 10:39:43,378 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 10:39:43,379 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 10:39:43,379 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 10:39:43,379 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 10:39:43,380 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 10:39:43,380 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 10:39:43,381 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 10:39:43,381 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 10:39:43,381 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 10:39:43,382 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 10:39:43,382 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 10:39:43,382 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 10:39:43,382 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 10:39:43,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 10:39:43,382 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 10:39:43,382 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 10:39:43,383 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 10:39:43,383 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 10:39:43,383 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 10:39:43,383 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 10:39:43,383 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 10:39:43,383 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 10:39:43,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 10:39:43,384 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 10:39:43,384 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 10:39:43,384 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 10:39:43,384 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 10:39:43,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 10:39:43,384 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 10:39:43,384 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 10:39:43,385 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 10:39:43,385 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 10:39:43,385 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 10:39:43,385 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 10:39:43,684 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 10:39:43,701 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 10:39:43,703 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 10:39:43,704 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 10:39:43,704 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 10:39:43,705 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2023-09-01 10:39:44,911 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 10:39:45,183 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 10:39:45,185 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2023-09-01 10:39:45,214 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91aaaee1c/a7d7f0d683ee48c79e2a1ab22362fbfb/FLAGc18df0ca5 [2023-09-01 10:39:45,228 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91aaaee1c/a7d7f0d683ee48c79e2a1ab22362fbfb [2023-09-01 10:39:45,230 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 10:39:45,231 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 10:39:45,233 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 10:39:45,234 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 10:39:45,236 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 10:39:45,236 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 10:39:45" (1/1) ... [2023-09-01 10:39:45,239 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ff306b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 10:39:45, skipping insertion in model container [2023-09-01 10:39:45,239 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 10:39:45" (1/1) ... [2023-09-01 10:39:45,244 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 10:39:45,290 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 10:39:45,415 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2023-09-01 10:39:45,775 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 10:39:45,785 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 10:39:45,796 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2023-09-01 10:39:45,840 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 10:39:45,949 INFO L208 MainTranslator]: Completed translation [2023-09-01 10:39:45,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 10:39:45 WrapperNode [2023-09-01 10:39:45,950 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 10:39:45,951 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 10:39:45,951 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 10:39:45,951 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 10:39:45,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 10:39:45" (1/1) ... [2023-09-01 10:39:45,978 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 10:39:45" (1/1) ... [2023-09-01 10:39:45,996 INFO L138 Inliner]: procedures = 364, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 62 [2023-09-01 10:39:45,997 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 10:39:45,997 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 10:39:45,998 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 10:39:45,998 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 10:39:46,005 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 10:39:45" (1/1) ... [2023-09-01 10:39:46,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 10:39:45" (1/1) ... [2023-09-01 10:39:46,014 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 10:39:45" (1/1) ... [2023-09-01 10:39:46,014 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 10:39:45" (1/1) ... [2023-09-01 10:39:46,019 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 10:39:45" (1/1) ... [2023-09-01 10:39:46,029 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 10:39:45" (1/1) ... [2023-09-01 10:39:46,031 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 10:39:45" (1/1) ... [2023-09-01 10:39:46,036 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 10:39:45" (1/1) ... [2023-09-01 10:39:46,038 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 10:39:46,039 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 10:39:46,039 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 10:39:46,039 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 10:39:46,040 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 10:39:45" (1/1) ... [2023-09-01 10:39:46,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 10:39:46,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 10:39:46,078 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 10:39:46,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 10:39:46,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 10:39:46,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 10:39:46,122 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 10:39:46,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 10:39:46,122 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 10:39:46,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 10:39:46,122 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2023-09-01 10:39:46,122 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2023-09-01 10:39:46,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 10:39:46,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 10:39:46,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 10:39:46,124 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 10:39:46,212 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 10:39:46,213 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 10:39:46,379 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 10:39:46,384 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 10:39:46,384 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 10:39:46,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 10:39:46 BoogieIcfgContainer [2023-09-01 10:39:46,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 10:39:46,386 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 10:39:46,387 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 10:39:46,389 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 10:39:46,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 10:39:45" (1/3) ... [2023-09-01 10:39:46,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2097e101 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 10:39:46, skipping insertion in model container [2023-09-01 10:39:46,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 10:39:45" (2/3) ... [2023-09-01 10:39:46,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2097e101 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 10:39:46, skipping insertion in model container [2023-09-01 10:39:46,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 10:39:46" (3/3) ... [2023-09-01 10:39:46,391 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2023-09-01 10:39:46,396 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 10:39:46,402 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 10:39:46,402 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 10:39:46,402 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 10:39:46,439 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-09-01 10:39:46,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 86 transitions, 180 flow [2023-09-01 10:39:46,505 INFO L130 PetriNetUnfolder]: 7/85 cut-off events. [2023-09-01 10:39:46,505 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 10:39:46,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 85 events. 7/85 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 82 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2023-09-01 10:39:46,509 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 86 transitions, 180 flow [2023-09-01 10:39:46,521 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 77 transitions, 160 flow [2023-09-01 10:39:46,524 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 10:39:46,530 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 77 transitions, 160 flow [2023-09-01 10:39:46,532 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 77 transitions, 160 flow [2023-09-01 10:39:46,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 77 transitions, 160 flow [2023-09-01 10:39:46,562 INFO L130 PetriNetUnfolder]: 6/77 cut-off events. [2023-09-01 10:39:46,563 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 10:39:46,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 77 events. 6/77 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 77 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2023-09-01 10:39:46,565 INFO L119 LiptonReduction]: Number of co-enabled transitions 722 [2023-09-01 10:39:48,239 INFO L134 LiptonReduction]: Checked pairs total: 866 [2023-09-01 10:39:48,239 INFO L136 LiptonReduction]: Total number of compositions: 68 [2023-09-01 10:39:48,252 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 10:39:48,257 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4780bd5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 10:39:48,257 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-09-01 10:39:48,260 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-09-01 10:39:48,260 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 10:39:48,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 10:39:48,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 10:39:48,262 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 10:39:48,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 10:39:48,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1683658225, now seen corresponding path program 1 times [2023-09-01 10:39:48,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 10:39:48,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232964982] [2023-09-01 10:39:48,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 10:39:48,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 10:39:48,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 10:39:48,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 10:39:48,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 10:39:48,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232964982] [2023-09-01 10:39:48,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232964982] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 10:39:48,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 10:39:48,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 10:39:48,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46465920] [2023-09-01 10:39:48,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 10:39:48,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 10:39:48,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 10:39:48,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 10:39:48,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 10:39:48,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 154 [2023-09-01 10:39:48,541 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 15 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:48,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 10:39:48,542 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 154 [2023-09-01 10:39:48,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 10:39:48,578 INFO L130 PetriNetUnfolder]: 41/86 cut-off events. [2023-09-01 10:39:48,578 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 10:39:48,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 86 events. 41/86 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 205 event pairs, 15 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 162. Up to 53 conditions per place. [2023-09-01 10:39:48,580 INFO L137 encePairwiseOnDemand]: 151/154 looper letters, 20 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2023-09-01 10:39:48,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 23 transitions, 96 flow [2023-09-01 10:39:48,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 10:39:48,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 10:39:48,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 239 transitions. [2023-09-01 10:39:48,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5173160173160173 [2023-09-01 10:39:48,597 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 239 transitions. [2023-09-01 10:39:48,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 239 transitions. [2023-09-01 10:39:48,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 10:39:48,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 239 transitions. [2023-09-01 10:39:48,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:48,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:48,611 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:48,612 INFO L175 Difference]: Start difference. First operand has 17 places, 15 transitions, 36 flow. Second operand 3 states and 239 transitions. [2023-09-01 10:39:48,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 23 transitions, 96 flow [2023-09-01 10:39:48,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 23 transitions, 92 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 10:39:48,620 INFO L231 Difference]: Finished difference. Result has 18 places, 16 transitions, 44 flow [2023-09-01 10:39:48,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=18, PETRI_TRANSITIONS=16} [2023-09-01 10:39:48,627 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 1 predicate places. [2023-09-01 10:39:48,627 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 16 transitions, 44 flow [2023-09-01 10:39:48,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:48,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 10:39:48,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 10:39:48,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 10:39:48,629 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 10:39:48,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 10:39:48,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1559967075, now seen corresponding path program 1 times [2023-09-01 10:39:48,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 10:39:48,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191743322] [2023-09-01 10:39:48,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 10:39:48,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 10:39:48,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 10:39:48,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 10:39:48,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 10:39:48,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191743322] [2023-09-01 10:39:48,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191743322] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 10:39:48,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 10:39:48,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 10:39:48,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48378673] [2023-09-01 10:39:48,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 10:39:48,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 10:39:48,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 10:39:48,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 10:39:48,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 10:39:48,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 154 [2023-09-01 10:39:48,741 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 16 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:48,754 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 10:39:48,754 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 154 [2023-09-01 10:39:48,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 10:39:48,810 INFO L130 PetriNetUnfolder]: 61/143 cut-off events. [2023-09-01 10:39:48,810 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2023-09-01 10:39:48,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 143 events. 61/143 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 486 event pairs, 27 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 92. Up to 85 conditions per place. [2023-09-01 10:39:48,811 INFO L137 encePairwiseOnDemand]: 151/154 looper letters, 22 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2023-09-01 10:39:48,812 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 25 transitions, 120 flow [2023-09-01 10:39:48,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 10:39:48,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 10:39:48,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 236 transitions. [2023-09-01 10:39:48,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108225108225108 [2023-09-01 10:39:48,813 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 236 transitions. [2023-09-01 10:39:48,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 236 transitions. [2023-09-01 10:39:48,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 10:39:48,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 236 transitions. [2023-09-01 10:39:48,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:48,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:48,816 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:48,816 INFO L175 Difference]: Start difference. First operand has 18 places, 16 transitions, 44 flow. Second operand 3 states and 236 transitions. [2023-09-01 10:39:48,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 25 transitions, 120 flow [2023-09-01 10:39:48,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 25 transitions, 116 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 10:39:48,817 INFO L231 Difference]: Finished difference. Result has 20 places, 17 transitions, 54 flow [2023-09-01 10:39:48,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=54, PETRI_PLACES=20, PETRI_TRANSITIONS=17} [2023-09-01 10:39:48,818 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 3 predicate places. [2023-09-01 10:39:48,818 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 17 transitions, 54 flow [2023-09-01 10:39:48,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:48,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 10:39:48,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 10:39:48,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 10:39:48,819 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 10:39:48,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 10:39:48,819 INFO L85 PathProgramCache]: Analyzing trace with hash 517091689, now seen corresponding path program 1 times [2023-09-01 10:39:48,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 10:39:48,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341397433] [2023-09-01 10:39:48,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 10:39:48,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 10:39:48,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 10:39:48,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 10:39:48,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 10:39:48,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341397433] [2023-09-01 10:39:48,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341397433] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 10:39:48,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348549980] [2023-09-01 10:39:48,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 10:39:48,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 10:39:48,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 10:39:48,911 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 10:39:48,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 10:39:49,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 10:39:49,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 10:39:49,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 10:39:49,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 10:39:49,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 10:39:49,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 10:39:49,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348549980] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 10:39:49,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 10:39:49,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-09-01 10:39:49,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005457606] [2023-09-01 10:39:49,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 10:39:49,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 10:39:49,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 10:39:49,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 10:39:49,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 10:39:49,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 154 [2023-09-01 10:39:49,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 17 transitions, 54 flow. Second operand has 7 states, 7 states have (on average 73.57142857142857) internal successors, (515), 7 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:49,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 10:39:49,099 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 154 [2023-09-01 10:39:49,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 10:39:49,191 INFO L130 PetriNetUnfolder]: 111/264 cut-off events. [2023-09-01 10:39:49,191 INFO L131 PetriNetUnfolder]: For 113/113 co-relation queries the response was YES. [2023-09-01 10:39:49,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 264 events. 111/264 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 930 event pairs, 18 based on Foata normal form. 30/294 useless extension candidates. Maximal degree in co-relation 198. Up to 55 conditions per place. [2023-09-01 10:39:49,209 INFO L137 encePairwiseOnDemand]: 150/154 looper letters, 44 selfloop transitions, 6 changer transitions 0/51 dead transitions. [2023-09-01 10:39:49,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 51 transitions, 258 flow [2023-09-01 10:39:49,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 10:39:49,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 10:39:49,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 468 transitions. [2023-09-01 10:39:49,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5064935064935064 [2023-09-01 10:39:49,213 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 468 transitions. [2023-09-01 10:39:49,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 468 transitions. [2023-09-01 10:39:49,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 10:39:49,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 468 transitions. [2023-09-01 10:39:49,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:49,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:49,217 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:49,218 INFO L175 Difference]: Start difference. First operand has 20 places, 17 transitions, 54 flow. Second operand 6 states and 468 transitions. [2023-09-01 10:39:49,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 51 transitions, 258 flow [2023-09-01 10:39:49,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 51 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 10:39:49,220 INFO L231 Difference]: Finished difference. Result has 28 places, 20 transitions, 92 flow [2023-09-01 10:39:49,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=92, PETRI_PLACES=28, PETRI_TRANSITIONS=20} [2023-09-01 10:39:49,221 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 11 predicate places. [2023-09-01 10:39:49,221 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 20 transitions, 92 flow [2023-09-01 10:39:49,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 73.57142857142857) internal successors, (515), 7 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:49,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 10:39:49,222 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 10:39:49,240 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 10:39:49,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 10:39:49,428 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 10:39:49,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 10:39:49,428 INFO L85 PathProgramCache]: Analyzing trace with hash 359100007, now seen corresponding path program 2 times [2023-09-01 10:39:49,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 10:39:49,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990982187] [2023-09-01 10:39:49,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 10:39:49,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 10:39:49,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 10:39:49,519 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 10:39:49,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 10:39:49,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990982187] [2023-09-01 10:39:49,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990982187] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 10:39:49,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176984705] [2023-09-01 10:39:49,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 10:39:49,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 10:39:49,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 10:39:49,522 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 10:39:49,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 10:39:49,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 10:39:49,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 10:39:49,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 10:39:49,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 10:39:49,697 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 10:39:49,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 10:39:49,770 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 10:39:49,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176984705] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 10:39:49,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 10:39:49,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-09-01 10:39:49,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324564412] [2023-09-01 10:39:49,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 10:39:49,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 10:39:49,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 10:39:49,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 10:39:49,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-09-01 10:39:49,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 154 [2023-09-01 10:39:49,845 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 20 transitions, 92 flow. Second operand has 14 states, 14 states have (on average 69.21428571428571) internal successors, (969), 14 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:49,845 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 10:39:49,845 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 154 [2023-09-01 10:39:49,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 10:39:50,215 INFO L130 PetriNetUnfolder]: 323/748 cut-off events. [2023-09-01 10:39:50,215 INFO L131 PetriNetUnfolder]: For 1511/1511 co-relation queries the response was YES. [2023-09-01 10:39:50,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2276 conditions, 748 events. 323/748 cut-off events. For 1511/1511 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3110 event pairs, 10 based on Foata normal form. 107/855 useless extension candidates. Maximal degree in co-relation 588. Up to 168 conditions per place. [2023-09-01 10:39:50,220 INFO L137 encePairwiseOnDemand]: 147/154 looper letters, 158 selfloop transitions, 69 changer transitions 0/228 dead transitions. [2023-09-01 10:39:50,220 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 228 transitions, 1346 flow [2023-09-01 10:39:50,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-09-01 10:39:50,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-09-01 10:39:50,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2500 transitions. [2023-09-01 10:39:50,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4774637127578304 [2023-09-01 10:39:50,224 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2500 transitions. [2023-09-01 10:39:50,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2500 transitions. [2023-09-01 10:39:50,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 10:39:50,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2500 transitions. [2023-09-01 10:39:50,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 73.52941176470588) internal successors, (2500), 34 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:50,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 154.0) internal successors, (5390), 35 states have internal predecessors, (5390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:50,235 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 154.0) internal successors, (5390), 35 states have internal predecessors, (5390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:50,235 INFO L175 Difference]: Start difference. First operand has 28 places, 20 transitions, 92 flow. Second operand 34 states and 2500 transitions. [2023-09-01 10:39:50,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 228 transitions, 1346 flow [2023-09-01 10:39:50,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 228 transitions, 1286 flow, removed 27 selfloop flow, removed 1 redundant places. [2023-09-01 10:39:50,241 INFO L231 Difference]: Finished difference. Result has 85 places, 82 transitions, 724 flow [2023-09-01 10:39:50,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=724, PETRI_PLACES=85, PETRI_TRANSITIONS=82} [2023-09-01 10:39:50,241 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 68 predicate places. [2023-09-01 10:39:50,241 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 82 transitions, 724 flow [2023-09-01 10:39:50,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 69.21428571428571) internal successors, (969), 14 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:50,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 10:39:50,242 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 10:39:50,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 10:39:50,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-09-01 10:39:50,447 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 10:39:50,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 10:39:50,448 INFO L85 PathProgramCache]: Analyzing trace with hash -519767537, now seen corresponding path program 3 times [2023-09-01 10:39:50,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 10:39:50,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925760811] [2023-09-01 10:39:50,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 10:39:50,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 10:39:50,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 10:39:50,557 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-09-01 10:39:50,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 10:39:50,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925760811] [2023-09-01 10:39:50,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925760811] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 10:39:50,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716512075] [2023-09-01 10:39:50,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 10:39:50,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 10:39:50,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 10:39:50,559 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 10:39:50,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 10:39:50,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 10:39:50,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 10:39:50,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 10:39:50,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 10:39:50,681 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-09-01 10:39:50,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 10:39:50,743 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-09-01 10:39:50,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716512075] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 10:39:50,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 10:39:50,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-09-01 10:39:50,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042418957] [2023-09-01 10:39:50,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 10:39:50,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 10:39:50,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 10:39:50,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 10:39:50,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-09-01 10:39:50,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 154 [2023-09-01 10:39:50,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 82 transitions, 724 flow. Second operand has 9 states, 9 states have (on average 75.0) internal successors, (675), 9 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:50,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 10:39:50,758 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 154 [2023-09-01 10:39:50,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 10:39:50,971 INFO L130 PetriNetUnfolder]: 622/1299 cut-off events. [2023-09-01 10:39:50,971 INFO L131 PetriNetUnfolder]: For 19768/19770 co-relation queries the response was YES. [2023-09-01 10:39:50,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6866 conditions, 1299 events. 622/1299 cut-off events. For 19768/19770 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 6285 event pairs, 78 based on Foata normal form. 94/1393 useless extension candidates. Maximal degree in co-relation 5480. Up to 324 conditions per place. [2023-09-01 10:39:50,980 INFO L137 encePairwiseOnDemand]: 150/154 looper letters, 128 selfloop transitions, 38 changer transitions 0/167 dead transitions. [2023-09-01 10:39:50,981 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 167 transitions, 1986 flow [2023-09-01 10:39:50,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 10:39:50,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 10:39:50,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 631 transitions. [2023-09-01 10:39:50,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121753246753247 [2023-09-01 10:39:50,982 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 631 transitions. [2023-09-01 10:39:50,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 631 transitions. [2023-09-01 10:39:50,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 10:39:50,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 631 transitions. [2023-09-01 10:39:50,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 78.875) internal successors, (631), 8 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:50,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 154.0) internal successors, (1386), 9 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:50,986 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 154.0) internal successors, (1386), 9 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:50,986 INFO L175 Difference]: Start difference. First operand has 85 places, 82 transitions, 724 flow. Second operand 8 states and 631 transitions. [2023-09-01 10:39:50,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 167 transitions, 1986 flow [2023-09-01 10:39:51,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 167 transitions, 1900 flow, removed 11 selfloop flow, removed 4 redundant places. [2023-09-01 10:39:51,008 INFO L231 Difference]: Finished difference. Result has 93 places, 86 transitions, 860 flow [2023-09-01 10:39:51,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=860, PETRI_PLACES=93, PETRI_TRANSITIONS=86} [2023-09-01 10:39:51,010 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 76 predicate places. [2023-09-01 10:39:51,010 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 86 transitions, 860 flow [2023-09-01 10:39:51,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 75.0) internal successors, (675), 9 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:51,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 10:39:51,010 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 10:39:51,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-09-01 10:39:51,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 10:39:51,216 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 10:39:51,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 10:39:51,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1170256247, now seen corresponding path program 4 times [2023-09-01 10:39:51,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 10:39:51,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561833737] [2023-09-01 10:39:51,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 10:39:51,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 10:39:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 10:39:51,471 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-09-01 10:39:51,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 10:39:51,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561833737] [2023-09-01 10:39:51,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561833737] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 10:39:51,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381727433] [2023-09-01 10:39:51,472 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 10:39:51,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 10:39:51,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 10:39:51,477 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 10:39:51,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 10:39:51,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 10:39:51,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 10:39:51,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 10:39:51,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 10:39:51,722 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-09-01 10:39:51,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 10:39:51,883 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-09-01 10:39:51,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381727433] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 10:39:51,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 10:39:51,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2023-09-01 10:39:51,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572176102] [2023-09-01 10:39:51,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 10:39:51,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 10:39:51,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 10:39:51,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 10:39:51,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2023-09-01 10:39:51,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 154 [2023-09-01 10:39:51,915 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 86 transitions, 860 flow. Second operand has 23 states, 23 states have (on average 72.65217391304348) internal successors, (1671), 23 states have internal predecessors, (1671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:51,915 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 10:39:51,915 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 154 [2023-09-01 10:39:51,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 10:39:52,438 INFO L130 PetriNetUnfolder]: 1162/2840 cut-off events. [2023-09-01 10:39:52,439 INFO L131 PetriNetUnfolder]: For 87720/87720 co-relation queries the response was YES. [2023-09-01 10:39:52,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13897 conditions, 2840 events. 1162/2840 cut-off events. For 87720/87720 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 14961 event pairs, 61 based on Foata normal form. 270/3109 useless extension candidates. Maximal degree in co-relation 11881. Up to 594 conditions per place. [2023-09-01 10:39:52,458 INFO L137 encePairwiseOnDemand]: 150/154 looper letters, 327 selfloop transitions, 66 changer transitions 0/394 dead transitions. [2023-09-01 10:39:52,458 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 394 transitions, 6238 flow [2023-09-01 10:39:52,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 10:39:52,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 10:39:52,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1723 transitions. [2023-09-01 10:39:52,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5085596221959858 [2023-09-01 10:39:52,462 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1723 transitions. [2023-09-01 10:39:52,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1723 transitions. [2023-09-01 10:39:52,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 10:39:52,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1723 transitions. [2023-09-01 10:39:52,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 78.31818181818181) internal successors, (1723), 22 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:52,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 154.0) internal successors, (3542), 23 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:52,470 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 154.0) internal successors, (3542), 23 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:52,470 INFO L175 Difference]: Start difference. First operand has 93 places, 86 transitions, 860 flow. Second operand 22 states and 1723 transitions. [2023-09-01 10:39:52,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 394 transitions, 6238 flow [2023-09-01 10:39:52,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 394 transitions, 5274 flow, removed 420 selfloop flow, removed 2 redundant places. [2023-09-01 10:39:52,587 INFO L231 Difference]: Finished difference. Result has 123 places, 119 transitions, 1336 flow [2023-09-01 10:39:52,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1336, PETRI_PLACES=123, PETRI_TRANSITIONS=119} [2023-09-01 10:39:52,589 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 106 predicate places. [2023-09-01 10:39:52,589 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 119 transitions, 1336 flow [2023-09-01 10:39:52,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 72.65217391304348) internal successors, (1671), 23 states have internal predecessors, (1671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:52,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 10:39:52,590 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 10:39:52,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 10:39:52,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 10:39:52,795 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 10:39:52,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 10:39:52,796 INFO L85 PathProgramCache]: Analyzing trace with hash -837674743, now seen corresponding path program 5 times [2023-09-01 10:39:52,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 10:39:52,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427794972] [2023-09-01 10:39:52,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 10:39:52,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 10:39:52,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 10:39:53,021 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 20 proven. 66 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2023-09-01 10:39:53,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 10:39:53,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427794972] [2023-09-01 10:39:53,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427794972] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 10:39:53,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492579006] [2023-09-01 10:39:53,022 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 10:39:53,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 10:39:53,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 10:39:53,023 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 10:39:53,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 10:39:53,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2023-09-01 10:39:53,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 10:39:53,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 10:39:53,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 10:39:53,244 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 20 proven. 66 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2023-09-01 10:39:53,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 10:39:53,322 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 20 proven. 66 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2023-09-01 10:39:53,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492579006] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 10:39:53,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 10:39:53,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-09-01 10:39:53,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649953245] [2023-09-01 10:39:53,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 10:39:53,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 10:39:53,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 10:39:53,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 10:39:53,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-09-01 10:39:53,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 154 [2023-09-01 10:39:53,346 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 119 transitions, 1336 flow. Second operand has 17 states, 17 states have (on average 74.82352941176471) internal successors, (1272), 17 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:53,346 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 10:39:53,346 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 154 [2023-09-01 10:39:53,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 10:39:54,155 INFO L130 PetriNetUnfolder]: 2538/5271 cut-off events. [2023-09-01 10:39:54,155 INFO L131 PetriNetUnfolder]: For 98046/98048 co-relation queries the response was YES. [2023-09-01 10:39:54,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30779 conditions, 5271 events. 2538/5271 cut-off events. For 98046/98048 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 31846 event pairs, 198 based on Foata normal form. 346/5617 useless extension candidates. Maximal degree in co-relation 28711. Up to 1298 conditions per place. [2023-09-01 10:39:54,202 INFO L137 encePairwiseOnDemand]: 150/154 looper letters, 437 selfloop transitions, 46 changer transitions 0/484 dead transitions. [2023-09-01 10:39:54,202 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 484 transitions, 7162 flow [2023-09-01 10:39:54,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 10:39:54,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 10:39:54,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1267 transitions. [2023-09-01 10:39:54,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142045454545454 [2023-09-01 10:39:54,205 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1267 transitions. [2023-09-01 10:39:54,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1267 transitions. [2023-09-01 10:39:54,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 10:39:54,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1267 transitions. [2023-09-01 10:39:54,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 79.1875) internal successors, (1267), 16 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:54,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 154.0) internal successors, (2618), 17 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:54,210 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 154.0) internal successors, (2618), 17 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:54,210 INFO L175 Difference]: Start difference. First operand has 123 places, 119 transitions, 1336 flow. Second operand 16 states and 1267 transitions. [2023-09-01 10:39:54,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 484 transitions, 7162 flow [2023-09-01 10:39:54,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 484 transitions, 6892 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-09-01 10:39:54,324 INFO L231 Difference]: Finished difference. Result has 138 places, 128 transitions, 1588 flow [2023-09-01 10:39:54,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=1282, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1588, PETRI_PLACES=138, PETRI_TRANSITIONS=128} [2023-09-01 10:39:54,325 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 121 predicate places. [2023-09-01 10:39:54,325 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 128 transitions, 1588 flow [2023-09-01 10:39:54,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 74.82352941176471) internal successors, (1272), 17 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:54,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 10:39:54,326 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 10:39:54,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 10:39:54,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 10:39:54,531 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 10:39:54,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 10:39:54,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1128715209, now seen corresponding path program 6 times [2023-09-01 10:39:54,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 10:39:54,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517393044] [2023-09-01 10:39:54,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 10:39:54,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 10:39:54,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 10:39:54,919 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 320 proven. 378 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2023-09-01 10:39:54,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 10:39:54,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517393044] [2023-09-01 10:39:54,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517393044] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 10:39:54,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515030305] [2023-09-01 10:39:54,920 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 10:39:54,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 10:39:54,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 10:39:54,921 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 10:39:54,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 10:39:55,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2023-09-01 10:39:55,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 10:39:55,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 10:39:55,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 10:39:55,357 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 320 proven. 378 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2023-09-01 10:39:55,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 10:39:55,616 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 320 proven. 378 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2023-09-01 10:39:55,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515030305] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 10:39:55,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 10:39:55,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2023-09-01 10:39:55,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560796316] [2023-09-01 10:39:55,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 10:39:55,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 10:39:55,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 10:39:55,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 10:39:55,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2023-09-01 10:39:55,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 154 [2023-09-01 10:39:55,642 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 128 transitions, 1588 flow. Second operand has 23 states, 23 states have (on average 75.21739130434783) internal successors, (1730), 23 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:55,642 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 10:39:55,642 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 154 [2023-09-01 10:39:55,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 10:39:56,932 INFO L130 PetriNetUnfolder]: 3570/7335 cut-off events. [2023-09-01 10:39:56,933 INFO L131 PetriNetUnfolder]: For 168608/168610 co-relation queries the response was YES. [2023-09-01 10:39:56,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45389 conditions, 7335 events. 3570/7335 cut-off events. For 168608/168610 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 45296 event pairs, 198 based on Foata normal form. 260/7595 useless extension candidates. Maximal degree in co-relation 42529. Up to 1826 conditions per place. [2023-09-01 10:39:56,998 INFO L137 encePairwiseOnDemand]: 150/154 looper letters, 611 selfloop transitions, 52 changer transitions 0/664 dead transitions. [2023-09-01 10:39:56,998 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 664 transitions, 9734 flow [2023-09-01 10:39:56,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 10:39:56,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 10:39:57,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1739 transitions. [2023-09-01 10:39:57,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132821723730815 [2023-09-01 10:39:57,002 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1739 transitions. [2023-09-01 10:39:57,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1739 transitions. [2023-09-01 10:39:57,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 10:39:57,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1739 transitions. [2023-09-01 10:39:57,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 79.04545454545455) internal successors, (1739), 22 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:57,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 154.0) internal successors, (3542), 23 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:57,009 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 154.0) internal successors, (3542), 23 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:57,009 INFO L175 Difference]: Start difference. First operand has 138 places, 128 transitions, 1588 flow. Second operand 22 states and 1739 transitions. [2023-09-01 10:39:57,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 664 transitions, 9734 flow [2023-09-01 10:39:57,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 664 transitions, 9674 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-09-01 10:39:57,120 INFO L231 Difference]: Finished difference. Result has 161 places, 135 transitions, 1826 flow [2023-09-01 10:39:57,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=1528, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1826, PETRI_PLACES=161, PETRI_TRANSITIONS=135} [2023-09-01 10:39:57,121 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 144 predicate places. [2023-09-01 10:39:57,121 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 135 transitions, 1826 flow [2023-09-01 10:39:57,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 75.21739130434783) internal successors, (1730), 23 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:39:57,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 10:39:57,122 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 10:39:57,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 10:39:57,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 10:39:57,329 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 10:39:57,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 10:39:57,329 INFO L85 PathProgramCache]: Analyzing trace with hash 172548031, now seen corresponding path program 7 times [2023-09-01 10:39:57,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 10:39:57,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422683413] [2023-09-01 10:39:57,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 10:39:57,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 10:39:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 10:40:00,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 10:40:00,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 10:40:00,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422683413] [2023-09-01 10:40:00,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422683413] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 10:40:00,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587704435] [2023-09-01 10:40:00,931 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 10:40:00,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 10:40:00,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 10:40:00,932 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 10:40:00,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 10:40:01,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 10:40:01,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 168 conjunts are in the unsatisfiable core [2023-09-01 10:40:01,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 10:40:01,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 10:40:01,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 10:40:01,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 10:40:01,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587704435] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 10:40:01,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 10:40:01,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2023-09-01 10:40:01,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038370891] [2023-09-01 10:40:01,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 10:40:01,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-09-01 10:40:01,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 10:40:01,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-09-01 10:40:01,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2023-09-01 10:40:02,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 154 [2023-09-01 10:40:02,993 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 135 transitions, 1826 flow. Second operand has 63 states, 63 states have (on average 71.34920634920636) internal successors, (4495), 63 states have internal predecessors, (4495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:40:02,993 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 10:40:02,993 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 154 [2023-09-01 10:40:02,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 10:41:47,652 INFO L130 PetriNetUnfolder]: 111574/223171 cut-off events. [2023-09-01 10:41:47,652 INFO L131 PetriNetUnfolder]: For 8867754/8867754 co-relation queries the response was YES. [2023-09-01 10:41:51,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1694039 conditions, 223171 events. 111574/223171 cut-off events. For 8867754/8867754 co-relation queries the response was YES. Maximal size of possible extension queue 1804. Compared 2322248 event pairs, 3065 based on Foata normal form. 1/223172 useless extension candidates. Maximal degree in co-relation 1681661. Up to 48711 conditions per place. [2023-09-01 10:41:52,012 INFO L137 encePairwiseOnDemand]: 149/154 looper letters, 10810 selfloop transitions, 1382 changer transitions 1/12193 dead transitions. [2023-09-01 10:41:52,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 653 places, 12193 transitions, 219805 flow [2023-09-01 10:41:52,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 493 states. [2023-09-01 10:41:52,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 493 states. [2023-09-01 10:41:52,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 37878 transitions. [2023-09-01 10:41:52,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49890677274044415 [2023-09-01 10:41:52,059 INFO L72 ComplementDD]: Start complementDD. Operand 493 states and 37878 transitions. [2023-09-01 10:41:52,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 493 states and 37878 transitions. [2023-09-01 10:41:52,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 10:41:52,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 493 states and 37878 transitions. [2023-09-01 10:41:52,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 494 states, 493 states have (on average 76.8316430020284) internal successors, (37878), 493 states have internal predecessors, (37878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:41:52,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 494 states, 494 states have (on average 154.0) internal successors, (76076), 494 states have internal predecessors, (76076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:41:52,218 INFO L81 ComplementDD]: Finished complementDD. Result has 494 states, 494 states have (on average 154.0) internal successors, (76076), 494 states have internal predecessors, (76076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:41:52,218 INFO L175 Difference]: Start difference. First operand has 161 places, 135 transitions, 1826 flow. Second operand 493 states and 37878 transitions. [2023-09-01 10:41:52,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 653 places, 12193 transitions, 219805 flow [2023-09-01 10:47:31,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 640 places, 12193 transitions, 211235 flow, removed 0 selfloop flow, removed 13 redundant places. [2023-09-01 10:47:31,613 INFO L231 Difference]: Finished difference. Result has 641 places, 1576 transitions, 7546 flow [2023-09-01 10:47:31,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=1750, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=493, PETRI_FLOW=7546, PETRI_PLACES=641, PETRI_TRANSITIONS=1576} [2023-09-01 10:47:31,614 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 624 predicate places. [2023-09-01 10:47:31,614 INFO L495 AbstractCegarLoop]: Abstraction has has 641 places, 1576 transitions, 7546 flow [2023-09-01 10:47:31,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 71.34920634920636) internal successors, (4495), 63 states have internal predecessors, (4495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:47:31,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 10:47:31,615 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 10:47:31,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 10:47:31,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 10:47:31,820 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 10:47:31,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 10:47:31,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1148916451, now seen corresponding path program 8 times [2023-09-01 10:47:31,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 10:47:31,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606251355] [2023-09-01 10:47:31,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 10:47:31,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 10:47:31,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 10:47:31,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 1330 trivial. 0 not checked. [2023-09-01 10:47:31,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 10:47:31,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606251355] [2023-09-01 10:47:31,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606251355] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 10:47:31,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 10:47:31,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 10:47:31,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465733829] [2023-09-01 10:47:31,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 10:47:31,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 10:47:31,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 10:47:31,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 10:47:31,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 10:47:31,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 154 [2023-09-01 10:47:31,985 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 641 places, 1576 transitions, 7546 flow. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:47:31,985 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 10:47:31,985 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 154 [2023-09-01 10:47:31,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 10:47:41,062 INFO L130 PetriNetUnfolder]: 10744/35635 cut-off events. [2023-09-01 10:47:41,063 INFO L131 PetriNetUnfolder]: For 3230285/3230285 co-relation queries the response was YES. [2023-09-01 10:47:41,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 353543 conditions, 35635 events. 10744/35635 cut-off events. For 3230285/3230285 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 399269 event pairs, 506 based on Foata normal form. 10012/45647 useless extension candidates. Maximal degree in co-relation 350101. Up to 23354 conditions per place. [2023-09-01 10:47:41,678 INFO L137 encePairwiseOnDemand]: 150/154 looper letters, 537 selfloop transitions, 112 changer transitions 0/1109 dead transitions. [2023-09-01 10:47:41,678 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 612 places, 1109 transitions, 7197 flow [2023-09-01 10:47:41,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 10:47:41,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 10:47:41,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 233 transitions. [2023-09-01 10:47:41,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5043290043290043 [2023-09-01 10:47:41,680 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 233 transitions. [2023-09-01 10:47:41,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 233 transitions. [2023-09-01 10:47:41,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 10:47:41,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 233 transitions. [2023-09-01 10:47:41,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:47:41,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:47:41,682 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:47:41,682 INFO L175 Difference]: Start difference. First operand has 641 places, 1576 transitions, 7546 flow. Second operand 3 states and 233 transitions. [2023-09-01 10:47:41,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 612 places, 1109 transitions, 7197 flow [2023-09-01 10:48:07,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 612 places, 1109 transitions, 7197 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 10:48:07,535 INFO L231 Difference]: Finished difference. Result has 612 places, 1094 transitions, 5842 flow [2023-09-01 10:48:07,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=5618, PETRI_DIFFERENCE_MINUEND_PLACES=610, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1094, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=982, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=5842, PETRI_PLACES=612, PETRI_TRANSITIONS=1094} [2023-09-01 10:48:07,537 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 595 predicate places. [2023-09-01 10:48:07,537 INFO L495 AbstractCegarLoop]: Abstraction has has 612 places, 1094 transitions, 5842 flow [2023-09-01 10:48:07,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:48:07,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 10:48:07,537 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 10:48:07,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 10:48:07,538 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 10:48:07,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 10:48:07,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1655298021, now seen corresponding path program 9 times [2023-09-01 10:48:07,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 10:48:07,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602746395] [2023-09-01 10:48:07,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 10:48:07,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 10:48:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 10:48:10,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 10:48:10,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 10:48:10,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602746395] [2023-09-01 10:48:10,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602746395] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 10:48:10,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657827902] [2023-09-01 10:48:10,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 10:48:10,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 10:48:10,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 10:48:10,093 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 10:48:10,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 10:48:10,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2023-09-01 10:48:10,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 10:48:10,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 168 conjunts are in the unsatisfiable core [2023-09-01 10:48:10,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 10:48:11,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 10:48:11,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 10:48:11,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 10:48:11,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657827902] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 10:48:11,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 10:48:11,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2023-09-01 10:48:11,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353115815] [2023-09-01 10:48:11,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 10:48:11,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-09-01 10:48:11,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 10:48:11,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-09-01 10:48:11,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2023-09-01 10:48:12,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 154 [2023-09-01 10:48:12,482 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 612 places, 1094 transitions, 5842 flow. Second operand has 63 states, 63 states have (on average 71.34920634920636) internal successors, (4495), 63 states have internal predecessors, (4495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:48:12,482 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 10:48:12,482 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 154 [2023-09-01 10:48:12,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 10:49:08,252 INFO L130 PetriNetUnfolder]: 19289/62900 cut-off events. [2023-09-01 10:49:08,252 INFO L131 PetriNetUnfolder]: For 5719220/5719220 co-relation queries the response was YES. [2023-09-01 10:49:08,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 669763 conditions, 62900 events. 19289/62900 cut-off events. For 5719220/5719220 co-relation queries the response was YES. Maximal size of possible extension queue 854. Compared 757935 event pairs, 6016 based on Foata normal form. 1/62901 useless extension candidates. Maximal degree in co-relation 664409. Up to 34273 conditions per place. [2023-09-01 10:49:09,179 INFO L137 encePairwiseOnDemand]: 149/154 looper letters, 4552 selfloop transitions, 1223 changer transitions 1/5776 dead transitions. [2023-09-01 10:49:09,180 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1031 places, 5776 transitions, 86231 flow [2023-09-01 10:49:09,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 420 states. [2023-09-01 10:49:09,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2023-09-01 10:49:09,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 31462 transitions. [2023-09-01 10:49:09,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48642547928262214 [2023-09-01 10:49:09,337 INFO L72 ComplementDD]: Start complementDD. Operand 420 states and 31462 transitions. [2023-09-01 10:49:09,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 420 states and 31462 transitions. [2023-09-01 10:49:09,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 10:49:09,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 420 states and 31462 transitions. [2023-09-01 10:49:09,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 421 states, 420 states have (on average 74.9095238095238) internal successors, (31462), 420 states have internal predecessors, (31462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:49:09,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 421 states, 421 states have (on average 154.0) internal successors, (64834), 421 states have internal predecessors, (64834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:49:09,429 INFO L81 ComplementDD]: Finished complementDD. Result has 421 states, 421 states have (on average 154.0) internal successors, (64834), 421 states have internal predecessors, (64834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:49:09,429 INFO L175 Difference]: Start difference. First operand has 612 places, 1094 transitions, 5842 flow. Second operand 420 states and 31462 transitions. [2023-09-01 10:49:09,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1031 places, 5776 transitions, 86231 flow [2023-09-01 10:50:11,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1030 places, 5776 transitions, 83070 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 10:50:11,373 INFO L231 Difference]: Finished difference. Result has 1213 places, 2316 transitions, 15513 flow [2023-09-01 10:50:11,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=5730, PETRI_DIFFERENCE_MINUEND_PLACES=611, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1094, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=671, PETRI_DIFFERENCE_SUBTRAHEND_STATES=420, PETRI_FLOW=15513, PETRI_PLACES=1213, PETRI_TRANSITIONS=2316} [2023-09-01 10:50:11,375 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 1196 predicate places. [2023-09-01 10:50:11,376 INFO L495 AbstractCegarLoop]: Abstraction has has 1213 places, 2316 transitions, 15513 flow [2023-09-01 10:50:11,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 71.34920634920636) internal successors, (4495), 63 states have internal predecessors, (4495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:50:11,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 10:50:11,376 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 10:50:11,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 10:50:11,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-09-01 10:50:11,583 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 10:50:11,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 10:50:11,584 INFO L85 PathProgramCache]: Analyzing trace with hash -428446317, now seen corresponding path program 10 times [2023-09-01 10:50:11,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 10:50:11,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429682788] [2023-09-01 10:50:11,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 10:50:11,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 10:50:11,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 10:50:14,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 10:50:14,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 10:50:14,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429682788] [2023-09-01 10:50:14,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429682788] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 10:50:14,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200851765] [2023-09-01 10:50:14,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 10:50:14,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 10:50:14,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 10:50:14,209 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 10:50:14,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 10:50:16,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 10:50:16,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 10:50:16,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 168 conjunts are in the unsatisfiable core [2023-09-01 10:50:16,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 10:50:16,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 10:50:16,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 10:50:16,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 10:50:16,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200851765] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 10:50:16,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 10:50:16,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2023-09-01 10:50:16,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220438416] [2023-09-01 10:50:16,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 10:50:16,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-09-01 10:50:16,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 10:50:16,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-09-01 10:50:16,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2023-09-01 10:50:17,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 154 [2023-09-01 10:50:17,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1213 places, 2316 transitions, 15513 flow. Second operand has 63 states, 63 states have (on average 71.34920634920636) internal successors, (4495), 63 states have internal predecessors, (4495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:50:17,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 10:50:17,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 154 [2023-09-01 10:50:17,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 10:52:01,459 INFO L130 PetriNetUnfolder]: 30003/96779 cut-off events. [2023-09-01 10:52:01,460 INFO L131 PetriNetUnfolder]: For 9078908/9078908 co-relation queries the response was YES. [2023-09-01 10:52:08,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1057194 conditions, 96779 events. 30003/96779 cut-off events. For 9078908/9078908 co-relation queries the response was YES. Maximal size of possible extension queue 1443. Compared 1250507 event pairs, 9582 based on Foata normal form. 1/96780 useless extension candidates. Maximal degree in co-relation 1056117. Up to 55932 conditions per place. [2023-09-01 10:52:08,671 INFO L137 encePairwiseOnDemand]: 149/154 looper letters, 5155 selfloop transitions, 1492 changer transitions 1/6648 dead transitions. [2023-09-01 10:52:08,671 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1608 places, 6648 transitions, 93682 flow [2023-09-01 10:52:08,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 396 states. [2023-09-01 10:52:08,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2023-09-01 10:52:08,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 29661 transitions. [2023-09-01 10:52:08,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48637347500983863 [2023-09-01 10:52:08,688 INFO L72 ComplementDD]: Start complementDD. Operand 396 states and 29661 transitions. [2023-09-01 10:52:08,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 396 states and 29661 transitions. [2023-09-01 10:52:08,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 10:52:08,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 396 states and 29661 transitions. [2023-09-01 10:52:08,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 397 states, 396 states have (on average 74.90151515151516) internal successors, (29661), 396 states have internal predecessors, (29661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:52:08,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 397 states, 397 states have (on average 154.0) internal successors, (61138), 397 states have internal predecessors, (61138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:52:08,757 INFO L81 ComplementDD]: Finished complementDD. Result has 397 states, 397 states have (on average 154.0) internal successors, (61138), 397 states have internal predecessors, (61138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:52:08,757 INFO L175 Difference]: Start difference. First operand has 1213 places, 2316 transitions, 15513 flow. Second operand 396 states and 29661 transitions. [2023-09-01 10:52:08,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1608 places, 6648 transitions, 93682 flow Killed by 15