./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/queue_longer.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --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/queue_longer.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 9f874a9872f93f025fac23ebed37f94a1f3b80bd0133ea4d7e298577c4fec427 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 16:08:00,879 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 16:08:00,881 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 16:08:00,917 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 16:08:00,919 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 16:08:00,922 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 16:08:00,923 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 16:08:00,925 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 16:08:00,926 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 16:08:00,926 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 16:08:00,927 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 16:08:00,928 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 16:08:00,928 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 16:08:00,929 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 16:08:00,930 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 16:08:00,931 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 16:08:00,931 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 16:08:00,932 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 16:08:00,933 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 16:08:00,941 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 16:08:00,947 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 16:08:00,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 16:08:00,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 16:08:00,950 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 16:08:00,952 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 16:08:00,953 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 16:08:00,953 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 16:08:00,957 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 16:08:00,958 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 16:08:00,959 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 16:08:00,959 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 16:08:00,964 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 16:08:00,966 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 16:08:00,967 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 16:08:00,967 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 16:08:00,968 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 16:08:00,969 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 16:08:00,969 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 16:08:00,969 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 16:08:00,969 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 16:08:00,970 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 16:08:00,971 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 16:08:00,990 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 16:08:00,990 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 16:08:00,990 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 16:08:00,990 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 16:08:00,991 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 16:08:00,991 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 16:08:00,992 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 16:08:00,992 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 16:08:00,992 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 16:08:00,992 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 16:08:00,992 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 16:08:00,992 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 16:08:00,993 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 16:08:00,993 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 16:08:00,993 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 16:08:00,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 16:08:00,993 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 16:08:00,993 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 16:08:00,993 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 16:08:00,993 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 16:08:00,994 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 16:08:00,994 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 16:08:00,994 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 16:08:00,994 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 16:08:00,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:08:00,994 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 16:08:00,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 16:08:00,994 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 16:08:00,995 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 16:08:00,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 16:08:00,995 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 16:08:00,995 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 16:08:00,995 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 16:08:00,995 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 16:08:00,995 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 16:08:00,995 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9f874a9872f93f025fac23ebed37f94a1f3b80bd0133ea4d7e298577c4fec427 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 16:08:01,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 16:08:01,308 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 16:08:01,311 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 16:08:01,313 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 16:08:01,313 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 16:08:01,314 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/queue_longer.i [2023-08-30 16:08:02,425 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 16:08:02,707 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 16:08:02,707 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_longer.i [2023-08-30 16:08:02,723 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7734ed52d/3658ce95ce6440b3804f668eedf8c0c1/FLAG3eecde4e1 [2023-08-30 16:08:02,736 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7734ed52d/3658ce95ce6440b3804f668eedf8c0c1 [2023-08-30 16:08:02,738 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 16:08:02,739 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 16:08:02,740 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 16:08:02,741 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 16:08:02,745 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 16:08:02,746 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:08:02" (1/1) ... [2023-08-30 16:08:02,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24319341 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:02, skipping insertion in model container [2023-08-30 16:08:02,747 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:08:02" (1/1) ... [2023-08-30 16:08:02,754 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 16:08:02,802 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 16:08:03,158 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/queue_longer.i[43296,43309] [2023-08-30 16:08:03,166 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/queue_longer.i[43503,43516] [2023-08-30 16:08:03,173 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/queue_longer.i[43783,43796] [2023-08-30 16:08:03,179 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:08:03,191 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 16:08:03,247 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/queue_longer.i[43296,43309] [2023-08-30 16:08:03,255 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/queue_longer.i[43503,43516] [2023-08-30 16:08:03,263 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/queue_longer.i[43783,43796] [2023-08-30 16:08:03,267 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:08:03,342 INFO L208 MainTranslator]: Completed translation [2023-08-30 16:08:03,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:03 WrapperNode [2023-08-30 16:08:03,343 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 16:08:03,344 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 16:08:03,344 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 16:08:03,345 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 16:08:03,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:03" (1/1) ... [2023-08-30 16:08:03,383 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:03" (1/1) ... [2023-08-30 16:08:03,419 INFO L138 Inliner]: procedures = 274, calls = 60, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 243 [2023-08-30 16:08:03,420 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 16:08:03,421 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 16:08:03,421 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 16:08:03,421 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 16:08:03,429 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:03" (1/1) ... [2023-08-30 16:08:03,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:03" (1/1) ... [2023-08-30 16:08:03,447 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:03" (1/1) ... [2023-08-30 16:08:03,452 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:03" (1/1) ... [2023-08-30 16:08:03,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:03" (1/1) ... [2023-08-30 16:08:03,475 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:03" (1/1) ... [2023-08-30 16:08:03,477 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:03" (1/1) ... [2023-08-30 16:08:03,478 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:03" (1/1) ... [2023-08-30 16:08:03,481 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 16:08:03,481 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 16:08:03,482 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 16:08:03,482 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 16:08:03,483 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:03" (1/1) ... [2023-08-30 16:08:03,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:08:03,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:08:03,522 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 16:08:03,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 16:08:03,558 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-30 16:08:03,559 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-30 16:08:03,559 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-30 16:08:03,559 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-30 16:08:03,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 16:08:03,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 16:08:03,560 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 16:08:03,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 16:08:03,560 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 16:08:03,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 16:08:03,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 16:08:03,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 16:08:03,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 16:08:03,562 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 16:08:03,701 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 16:08:03,703 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 16:08:04,123 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 16:08:04,131 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 16:08:04,134 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 16:08:04,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:08:04 BoogieIcfgContainer [2023-08-30 16:08:04,137 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 16:08:04,138 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 16:08:04,139 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 16:08:04,142 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 16:08:04,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:08:02" (1/3) ... [2023-08-30 16:08:04,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d606533 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:08:04, skipping insertion in model container [2023-08-30 16:08:04,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:03" (2/3) ... [2023-08-30 16:08:04,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d606533 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:08:04, skipping insertion in model container [2023-08-30 16:08:04,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:08:04" (3/3) ... [2023-08-30 16:08:04,145 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_longer.i [2023-08-30 16:08:04,152 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 16:08:04,161 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 16:08:04,161 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-08-30 16:08:04,162 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 16:08:04,302 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 16:08:04,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 250 places, 258 transitions, 532 flow [2023-08-30 16:08:04,491 INFO L130 PetriNetUnfolder]: 15/256 cut-off events. [2023-08-30 16:08:04,491 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:08:04,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 256 events. 15/256 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 359 event pairs, 0 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 185. Up to 2 conditions per place. [2023-08-30 16:08:04,500 INFO L82 GeneralOperation]: Start removeDead. Operand has 250 places, 258 transitions, 532 flow [2023-08-30 16:08:04,507 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 239 places, 247 transitions, 503 flow [2023-08-30 16:08:04,511 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:08:04,529 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 239 places, 247 transitions, 503 flow [2023-08-30 16:08:04,533 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 239 places, 247 transitions, 503 flow [2023-08-30 16:08:04,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 239 places, 247 transitions, 503 flow [2023-08-30 16:08:04,596 INFO L130 PetriNetUnfolder]: 15/247 cut-off events. [2023-08-30 16:08:04,596 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 16:08:04,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 247 events. 15/247 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 326 event pairs, 0 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 185. Up to 2 conditions per place. [2023-08-30 16:08:04,610 INFO L119 LiptonReduction]: Number of co-enabled transitions 15864 [2023-08-30 16:08:10,908 INFO L134 LiptonReduction]: Checked pairs total: 33075 [2023-08-30 16:08:10,908 INFO L136 LiptonReduction]: Total number of compositions: 215 [2023-08-30 16:08:10,919 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:08:10,924 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;@502c098, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:08:10,924 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 16:08:10,926 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-30 16:08:10,926 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:08:10,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:08:10,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 16:08:10,927 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:08:10,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:08:10,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2023-08-30 16:08:10,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:08:10,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344024898] [2023-08-30 16:08:10,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:08:10,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:08:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:08:11,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:08:11,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:08:11,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344024898] [2023-08-30 16:08:11,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344024898] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:08:11,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:08:11,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 16:08:11,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260913227] [2023-08-30 16:08:11,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:08:11,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 16:08:11,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:08:11,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 16:08:11,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 16:08:11,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 473 [2023-08-30 16:08:11,088 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 66 transitions, 141 flow. Second operand has 2 states, 2 states have (on average 245.5) internal successors, (491), 2 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:11,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:08:11,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 473 [2023-08-30 16:08:11,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:08:11,391 INFO L130 PetriNetUnfolder]: 1540/2645 cut-off events. [2023-08-30 16:08:11,392 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2023-08-30 16:08:11,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5115 conditions, 2645 events. 1540/2645 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 12466 event pairs, 1212 based on Foata normal form. 32/2302 useless extension candidates. Maximal degree in co-relation 4962. Up to 2396 conditions per place. [2023-08-30 16:08:11,406 INFO L137 encePairwiseOnDemand]: 470/473 looper letters, 53 selfloop transitions, 0 changer transitions 0/63 dead transitions. [2023-08-30 16:08:11,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 63 transitions, 241 flow [2023-08-30 16:08:11,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 16:08:11,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 16:08:11,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 546 transitions. [2023-08-30 16:08:11,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5771670190274841 [2023-08-30 16:08:11,427 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 546 transitions. [2023-08-30 16:08:11,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 546 transitions. [2023-08-30 16:08:11,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:08:11,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 546 transitions. [2023-08-30 16:08:11,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 273.0) internal successors, (546), 2 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:11,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 473.0) internal successors, (1419), 3 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:11,443 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 473.0) internal successors, (1419), 3 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:11,445 INFO L175 Difference]: Start difference. First operand has 63 places, 66 transitions, 141 flow. Second operand 2 states and 546 transitions. [2023-08-30 16:08:11,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 63 transitions, 241 flow [2023-08-30 16:08:11,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 63 transitions, 236 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 16:08:11,451 INFO L231 Difference]: Finished difference. Result has 60 places, 63 transitions, 130 flow [2023-08-30 16:08:11,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=130, PETRI_PLACES=60, PETRI_TRANSITIONS=63} [2023-08-30 16:08:11,456 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -3 predicate places. [2023-08-30 16:08:11,456 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 63 transitions, 130 flow [2023-08-30 16:08:11,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 245.5) internal successors, (491), 2 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:11,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:08:11,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:08:11,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 16:08:11,460 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:08:11,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:08:11,461 INFO L85 PathProgramCache]: Analyzing trace with hash 110343563, now seen corresponding path program 1 times [2023-08-30 16:08:11,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:08:11,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490612407] [2023-08-30 16:08:11,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:08:11,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:08:11,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:08:11,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:08:11,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:08:11,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490612407] [2023-08-30 16:08:11,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490612407] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:08:11,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:08:11,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:08:11,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992026674] [2023-08-30 16:08:11,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:08:11,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:08:11,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:08:11,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:08:11,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:08:11,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 473 [2023-08-30 16:08:11,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 63 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:11,666 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:08:11,666 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 473 [2023-08-30 16:08:11,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:08:11,948 INFO L130 PetriNetUnfolder]: 1508/2611 cut-off events. [2023-08-30 16:08:11,949 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:08:11,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5032 conditions, 2611 events. 1508/2611 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 12447 event pairs, 1167 based on Foata normal form. 0/2268 useless extension candidates. Maximal degree in co-relation 5029. Up to 2249 conditions per place. [2023-08-30 16:08:11,962 INFO L137 encePairwiseOnDemand]: 469/473 looper letters, 68 selfloop transitions, 3 changer transitions 0/81 dead transitions. [2023-08-30 16:08:11,962 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 81 transitions, 310 flow [2023-08-30 16:08:11,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:08:11,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:08:11,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 792 transitions. [2023-08-30 16:08:11,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2023-08-30 16:08:11,965 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 792 transitions. [2023-08-30 16:08:11,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 792 transitions. [2023-08-30 16:08:11,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:08:11,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 792 transitions. [2023-08-30 16:08:11,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 264.0) internal successors, (792), 3 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:11,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:11,973 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:11,973 INFO L175 Difference]: Start difference. First operand has 60 places, 63 transitions, 130 flow. Second operand 3 states and 792 transitions. [2023-08-30 16:08:11,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 81 transitions, 310 flow [2023-08-30 16:08:11,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 81 transitions, 310 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 16:08:11,976 INFO L231 Difference]: Finished difference. Result has 62 places, 62 transitions, 134 flow [2023-08-30 16:08:11,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=62, PETRI_TRANSITIONS=62} [2023-08-30 16:08:11,977 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -1 predicate places. [2023-08-30 16:08:11,977 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 62 transitions, 134 flow [2023-08-30 16:08:11,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:11,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:08:11,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:08:11,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 16:08:11,978 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:08:11,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:08:11,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1330496416, now seen corresponding path program 1 times [2023-08-30 16:08:11,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:08:11,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315993955] [2023-08-30 16:08:11,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:08:11,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:08:12,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:08:12,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:08:12,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:08:12,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315993955] [2023-08-30 16:08:12,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315993955] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:08:12,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:08:12,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:08:12,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382514083] [2023-08-30 16:08:12,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:08:12,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:08:12,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:08:12,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:08:12,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:08:13,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 473 [2023-08-30 16:08:13,565 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 62 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 223.4) internal successors, (1117), 5 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:13,565 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:08:13,565 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 473 [2023-08-30 16:08:13,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:08:14,035 INFO L130 PetriNetUnfolder]: 1608/2744 cut-off events. [2023-08-30 16:08:14,035 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 16:08:14,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5428 conditions, 2744 events. 1608/2744 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 12803 event pairs, 1244 based on Foata normal form. 0/2392 useless extension candidates. Maximal degree in co-relation 5424. Up to 2518 conditions per place. [2023-08-30 16:08:14,047 INFO L137 encePairwiseOnDemand]: 466/473 looper letters, 57 selfloop transitions, 9 changer transitions 0/74 dead transitions. [2023-08-30 16:08:14,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 74 transitions, 292 flow [2023-08-30 16:08:14,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 16:08:14,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 16:08:14,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1393 transitions. [2023-08-30 16:08:14,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4908386187455955 [2023-08-30 16:08:14,052 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1393 transitions. [2023-08-30 16:08:14,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1393 transitions. [2023-08-30 16:08:14,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:08:14,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1393 transitions. [2023-08-30 16:08:14,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 232.16666666666666) internal successors, (1393), 6 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:14,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:14,062 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:14,062 INFO L175 Difference]: Start difference. First operand has 62 places, 62 transitions, 134 flow. Second operand 6 states and 1393 transitions. [2023-08-30 16:08:14,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 74 transitions, 292 flow [2023-08-30 16:08:14,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 74 transitions, 284 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:08:14,065 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 186 flow [2023-08-30 16:08:14,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=186, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2023-08-30 16:08:14,066 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 6 predicate places. [2023-08-30 16:08:14,067 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 186 flow [2023-08-30 16:08:14,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 223.4) internal successors, (1117), 5 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:14,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:08:14,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:08:14,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 16:08:14,068 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:08:14,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:08:14,069 INFO L85 PathProgramCache]: Analyzing trace with hash -588975779, now seen corresponding path program 1 times [2023-08-30 16:08:14,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:08:14,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650227125] [2023-08-30 16:08:14,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:08:14,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:08:14,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:08:14,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:08:14,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:08:14,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650227125] [2023-08-30 16:08:14,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650227125] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:08:14,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:08:14,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 16:08:14,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622809751] [2023-08-30 16:08:14,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:08:14,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 16:08:14,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:08:14,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 16:08:14,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 16:08:14,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 473 [2023-08-30 16:08:14,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 186 flow. Second operand has 6 states, 6 states have (on average 220.16666666666666) internal successors, (1321), 6 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:14,771 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:08:14,771 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 473 [2023-08-30 16:08:14,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:08:15,133 INFO L130 PetriNetUnfolder]: 1839/3131 cut-off events. [2023-08-30 16:08:15,133 INFO L131 PetriNetUnfolder]: For 154/154 co-relation queries the response was YES. [2023-08-30 16:08:15,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6392 conditions, 3131 events. 1839/3131 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 15144 event pairs, 302 based on Foata normal form. 17/2811 useless extension candidates. Maximal degree in co-relation 6384. Up to 2548 conditions per place. [2023-08-30 16:08:15,150 INFO L137 encePairwiseOnDemand]: 465/473 looper letters, 98 selfloop transitions, 17 changer transitions 0/123 dead transitions. [2023-08-30 16:08:15,150 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 123 transitions, 540 flow [2023-08-30 16:08:15,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 16:08:15,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 16:08:15,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1420 transitions. [2023-08-30 16:08:15,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5003523608174771 [2023-08-30 16:08:15,154 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1420 transitions. [2023-08-30 16:08:15,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1420 transitions. [2023-08-30 16:08:15,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:08:15,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1420 transitions. [2023-08-30 16:08:15,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 236.66666666666666) internal successors, (1420), 6 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:15,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:15,165 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:15,165 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 186 flow. Second operand 6 states and 1420 transitions. [2023-08-30 16:08:15,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 123 transitions, 540 flow [2023-08-30 16:08:15,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 123 transitions, 540 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 16:08:15,170 INFO L231 Difference]: Finished difference. Result has 77 places, 79 transitions, 278 flow [2023-08-30 16:08:15,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=278, PETRI_PLACES=77, PETRI_TRANSITIONS=79} [2023-08-30 16:08:15,171 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 14 predicate places. [2023-08-30 16:08:15,171 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 79 transitions, 278 flow [2023-08-30 16:08:15,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 220.16666666666666) internal successors, (1321), 6 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:15,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:08:15,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:08:15,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 16:08:15,172 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:08:15,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:08:15,173 INFO L85 PathProgramCache]: Analyzing trace with hash -507576723, now seen corresponding path program 2 times [2023-08-30 16:08:15,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:08:15,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323335511] [2023-08-30 16:08:15,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:08:15,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:08:15,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:08:15,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:08:15,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:08:15,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323335511] [2023-08-30 16:08:15,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323335511] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:08:15,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:08:15,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 16:08:15,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598171222] [2023-08-30 16:08:15,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:08:15,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 16:08:15,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:08:15,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 16:08:15,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 16:08:16,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 473 [2023-08-30 16:08:16,130 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 79 transitions, 278 flow. Second operand has 6 states, 6 states have (on average 221.16666666666666) internal successors, (1327), 6 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:16,130 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:08:16,130 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 473 [2023-08-30 16:08:16,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:08:16,776 INFO L130 PetriNetUnfolder]: 1970/3340 cut-off events. [2023-08-30 16:08:16,777 INFO L131 PetriNetUnfolder]: For 690/690 co-relation queries the response was YES. [2023-08-30 16:08:16,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7299 conditions, 3340 events. 1970/3340 cut-off events. For 690/690 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 16276 event pairs, 827 based on Foata normal form. 17/3010 useless extension candidates. Maximal degree in co-relation 7287. Up to 2536 conditions per place. [2023-08-30 16:08:16,794 INFO L137 encePairwiseOnDemand]: 465/473 looper letters, 100 selfloop transitions, 20 changer transitions 0/128 dead transitions. [2023-08-30 16:08:16,795 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 128 transitions, 639 flow [2023-08-30 16:08:16,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 16:08:16,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 16:08:16,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1425 transitions. [2023-08-30 16:08:16,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5021141649048626 [2023-08-30 16:08:16,799 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1425 transitions. [2023-08-30 16:08:16,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1425 transitions. [2023-08-30 16:08:16,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:08:16,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1425 transitions. [2023-08-30 16:08:16,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 237.5) internal successors, (1425), 6 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:16,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:16,808 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 473.0) internal successors, (3311), 7 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:16,809 INFO L175 Difference]: Start difference. First operand has 77 places, 79 transitions, 278 flow. Second operand 6 states and 1425 transitions. [2023-08-30 16:08:16,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 128 transitions, 639 flow [2023-08-30 16:08:16,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 128 transitions, 623 flow, removed 8 selfloop flow, removed 0 redundant places. [2023-08-30 16:08:16,818 INFO L231 Difference]: Finished difference. Result has 84 places, 84 transitions, 352 flow [2023-08-30 16:08:16,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=352, PETRI_PLACES=84, PETRI_TRANSITIONS=84} [2023-08-30 16:08:16,820 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 21 predicate places. [2023-08-30 16:08:16,820 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 84 transitions, 352 flow [2023-08-30 16:08:16,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 221.16666666666666) internal successors, (1327), 6 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:16,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:08:16,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:08:16,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 16:08:16,821 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:08:16,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:08:16,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1152821177, now seen corresponding path program 3 times [2023-08-30 16:08:16,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:08:16,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558554811] [2023-08-30 16:08:16,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:08:16,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:08:16,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:08:17,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:08:17,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:08:17,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558554811] [2023-08-30 16:08:17,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558554811] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:08:17,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:08:17,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-30 16:08:17,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975491498] [2023-08-30 16:08:17,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:08:17,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 16:08:17,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:08:17,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 16:08:17,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-08-30 16:08:18,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 473 [2023-08-30 16:08:18,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 84 transitions, 352 flow. Second operand has 9 states, 9 states have (on average 207.44444444444446) internal successors, (1867), 9 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:18,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:08:18,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 473 [2023-08-30 16:08:18,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:08:20,106 INFO L130 PetriNetUnfolder]: 2695/4560 cut-off events. [2023-08-30 16:08:20,106 INFO L131 PetriNetUnfolder]: For 1111/1111 co-relation queries the response was YES. [2023-08-30 16:08:20,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10103 conditions, 4560 events. 2695/4560 cut-off events. For 1111/1111 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 23995 event pairs, 572 based on Foata normal form. 0/4080 useless extension candidates. Maximal degree in co-relation 10088. Up to 2481 conditions per place. [2023-08-30 16:08:20,139 INFO L137 encePairwiseOnDemand]: 462/473 looper letters, 156 selfloop transitions, 26 changer transitions 3/193 dead transitions. [2023-08-30 16:08:20,139 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 193 transitions, 982 flow [2023-08-30 16:08:20,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 16:08:20,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 16:08:20,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2027 transitions. [2023-08-30 16:08:20,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47615691801738314 [2023-08-30 16:08:20,145 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2027 transitions. [2023-08-30 16:08:20,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2027 transitions. [2023-08-30 16:08:20,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:08:20,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2027 transitions. [2023-08-30 16:08:20,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 225.22222222222223) internal successors, (2027), 9 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:20,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 473.0) internal successors, (4730), 10 states have internal predecessors, (4730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:20,159 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 473.0) internal successors, (4730), 10 states have internal predecessors, (4730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:20,159 INFO L175 Difference]: Start difference. First operand has 84 places, 84 transitions, 352 flow. Second operand 9 states and 2027 transitions. [2023-08-30 16:08:20,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 193 transitions, 982 flow [2023-08-30 16:08:20,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 193 transitions, 972 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-08-30 16:08:20,169 INFO L231 Difference]: Finished difference. Result has 96 places, 94 transitions, 467 flow [2023-08-30 16:08:20,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=467, PETRI_PLACES=96, PETRI_TRANSITIONS=94} [2023-08-30 16:08:20,174 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 33 predicate places. [2023-08-30 16:08:20,174 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 94 transitions, 467 flow [2023-08-30 16:08:20,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 207.44444444444446) internal successors, (1867), 9 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:20,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:08:20,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:08:20,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 16:08:20,176 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:08:20,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:08:20,177 INFO L85 PathProgramCache]: Analyzing trace with hash 454650260, now seen corresponding path program 1 times [2023-08-30 16:08:20,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:08:20,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721778282] [2023-08-30 16:08:20,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:08:20,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:08:20,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:08:20,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:08:20,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:08:20,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721778282] [2023-08-30 16:08:20,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721778282] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:08:20,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:08:20,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-30 16:08:20,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302250117] [2023-08-30 16:08:20,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:08:20,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 16:08:20,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:08:20,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 16:08:20,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-08-30 16:08:21,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 473 [2023-08-30 16:08:21,252 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 94 transitions, 467 flow. Second operand has 9 states, 9 states have (on average 206.44444444444446) internal successors, (1858), 9 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:21,252 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:08:21,252 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 473 [2023-08-30 16:08:21,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:08:21,860 INFO L130 PetriNetUnfolder]: 2672/4539 cut-off events. [2023-08-30 16:08:21,861 INFO L131 PetriNetUnfolder]: For 2260/2260 co-relation queries the response was YES. [2023-08-30 16:08:21,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10694 conditions, 4539 events. 2672/4539 cut-off events. For 2260/2260 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 23899 event pairs, 1905 based on Foata normal form. 0/4050 useless extension candidates. Maximal degree in co-relation 10674. Up to 4236 conditions per place. [2023-08-30 16:08:21,886 INFO L137 encePairwiseOnDemand]: 462/473 looper letters, 88 selfloop transitions, 17 changer transitions 0/113 dead transitions. [2023-08-30 16:08:21,886 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 113 transitions, 739 flow [2023-08-30 16:08:21,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 16:08:21,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 16:08:21,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1926 transitions. [2023-08-30 16:08:21,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452431289640592 [2023-08-30 16:08:21,892 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1926 transitions. [2023-08-30 16:08:21,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1926 transitions. [2023-08-30 16:08:21,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:08:21,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1926 transitions. [2023-08-30 16:08:21,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 214.0) internal successors, (1926), 9 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:21,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 473.0) internal successors, (4730), 10 states have internal predecessors, (4730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:21,903 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 473.0) internal successors, (4730), 10 states have internal predecessors, (4730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:21,903 INFO L175 Difference]: Start difference. First operand has 96 places, 94 transitions, 467 flow. Second operand 9 states and 1926 transitions. [2023-08-30 16:08:21,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 113 transitions, 739 flow [2023-08-30 16:08:21,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 113 transitions, 706 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-08-30 16:08:21,913 INFO L231 Difference]: Finished difference. Result has 105 places, 103 transitions, 538 flow [2023-08-30 16:08:21,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=538, PETRI_PLACES=105, PETRI_TRANSITIONS=103} [2023-08-30 16:08:21,914 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 42 predicate places. [2023-08-30 16:08:21,914 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 103 transitions, 538 flow [2023-08-30 16:08:21,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 206.44444444444446) internal successors, (1858), 9 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:21,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:08:21,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:08:21,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 16:08:21,915 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:08:21,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:08:21,916 INFO L85 PathProgramCache]: Analyzing trace with hash -535562244, now seen corresponding path program 1 times [2023-08-30 16:08:21,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:08:21,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855543489] [2023-08-30 16:08:21,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:08:21,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:08:21,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:08:21,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:08:21,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:08:21,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855543489] [2023-08-30 16:08:22,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855543489] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:08:22,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:08:22,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:08:22,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302683228] [2023-08-30 16:08:22,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:08:22,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:08:22,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:08:22,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:08:22,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:08:22,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 473 [2023-08-30 16:08:22,011 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 103 transitions, 538 flow. Second operand has 3 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:22,011 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:08:22,011 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 473 [2023-08-30 16:08:22,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:08:22,320 INFO L130 PetriNetUnfolder]: 1644/2836 cut-off events. [2023-08-30 16:08:22,320 INFO L131 PetriNetUnfolder]: For 615/632 co-relation queries the response was YES. [2023-08-30 16:08:22,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6342 conditions, 2836 events. 1644/2836 cut-off events. For 615/632 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 12148 event pairs, 875 based on Foata normal form. 127/2567 useless extension candidates. Maximal degree in co-relation 6317. Up to 1353 conditions per place. [2023-08-30 16:08:22,339 INFO L137 encePairwiseOnDemand]: 469/473 looper letters, 96 selfloop transitions, 3 changer transitions 1/113 dead transitions. [2023-08-30 16:08:22,340 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 113 transitions, 694 flow [2023-08-30 16:08:22,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:08:22,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:08:22,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 800 transitions. [2023-08-30 16:08:22,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5637773079633545 [2023-08-30 16:08:22,343 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 800 transitions. [2023-08-30 16:08:22,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 800 transitions. [2023-08-30 16:08:22,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:08:22,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 800 transitions. [2023-08-30 16:08:22,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:22,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:22,356 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:22,356 INFO L175 Difference]: Start difference. First operand has 105 places, 103 transitions, 538 flow. Second operand 3 states and 800 transitions. [2023-08-30 16:08:22,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 113 transitions, 694 flow [2023-08-30 16:08:22,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 113 transitions, 614 flow, removed 9 selfloop flow, removed 12 redundant places. [2023-08-30 16:08:22,365 INFO L231 Difference]: Finished difference. Result has 96 places, 89 transitions, 374 flow [2023-08-30 16:08:22,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=374, PETRI_PLACES=96, PETRI_TRANSITIONS=89} [2023-08-30 16:08:22,366 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 33 predicate places. [2023-08-30 16:08:22,366 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 89 transitions, 374 flow [2023-08-30 16:08:22,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:22,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:08:22,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:08:22,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 16:08:22,367 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:08:22,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:08:22,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1966953527, now seen corresponding path program 1 times [2023-08-30 16:08:22,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:08:22,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994949741] [2023-08-30 16:08:22,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:08:22,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:08:22,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:08:23,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:08:23,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:08:23,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994949741] [2023-08-30 16:08:23,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994949741] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:08:23,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:08:23,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 16:08:23,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018618896] [2023-08-30 16:08:23,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:08:23,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 16:08:23,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:08:23,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 16:08:23,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-08-30 16:08:24,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 473 [2023-08-30 16:08:24,726 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 89 transitions, 374 flow. Second operand has 10 states, 10 states have (on average 203.4) internal successors, (2034), 10 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:24,726 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:08:24,726 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 473 [2023-08-30 16:08:24,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:08:25,807 INFO L130 PetriNetUnfolder]: 1880/3301 cut-off events. [2023-08-30 16:08:25,807 INFO L131 PetriNetUnfolder]: For 407/407 co-relation queries the response was YES. [2023-08-30 16:08:25,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7302 conditions, 3301 events. 1880/3301 cut-off events. For 407/407 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 15059 event pairs, 1161 based on Foata normal form. 0/2864 useless extension candidates. Maximal degree in co-relation 7281. Up to 2482 conditions per place. [2023-08-30 16:08:25,822 INFO L137 encePairwiseOnDemand]: 461/473 looper letters, 107 selfloop transitions, 28 changer transitions 11/155 dead transitions. [2023-08-30 16:08:25,823 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 155 transitions, 842 flow [2023-08-30 16:08:25,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 16:08:25,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 16:08:25,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2149 transitions. [2023-08-30 16:08:25,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4543340380549683 [2023-08-30 16:08:25,829 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2149 transitions. [2023-08-30 16:08:25,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2149 transitions. [2023-08-30 16:08:25,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:08:25,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2149 transitions. [2023-08-30 16:08:25,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 214.9) internal successors, (2149), 10 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:25,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 473.0) internal successors, (5203), 11 states have internal predecessors, (5203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:25,843 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 473.0) internal successors, (5203), 11 states have internal predecessors, (5203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:25,843 INFO L175 Difference]: Start difference. First operand has 96 places, 89 transitions, 374 flow. Second operand 10 states and 2149 transitions. [2023-08-30 16:08:25,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 155 transitions, 842 flow [2023-08-30 16:08:25,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 155 transitions, 839 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:08:25,850 INFO L231 Difference]: Finished difference. Result has 110 places, 96 transitions, 523 flow [2023-08-30 16:08:25,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=523, PETRI_PLACES=110, PETRI_TRANSITIONS=96} [2023-08-30 16:08:25,851 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 47 predicate places. [2023-08-30 16:08:25,851 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 96 transitions, 523 flow [2023-08-30 16:08:25,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 203.4) internal successors, (2034), 10 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:25,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:08:25,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:08:25,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 16:08:25,853 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:08:25,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:08:25,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1279417377, now seen corresponding path program 2 times [2023-08-30 16:08:25,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:08:25,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667801699] [2023-08-30 16:08:25,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:08:25,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:08:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:08:26,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:08:26,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:08:26,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667801699] [2023-08-30 16:08:26,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667801699] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:08:26,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:08:26,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 16:08:26,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638635858] [2023-08-30 16:08:26,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:08:26,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 16:08:26,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:08:26,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 16:08:26,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-08-30 16:08:27,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 473 [2023-08-30 16:08:27,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 96 transitions, 523 flow. Second operand has 10 states, 10 states have (on average 203.4) internal successors, (2034), 10 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:27,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:08:27,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 473 [2023-08-30 16:08:27,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:08:27,861 INFO L130 PetriNetUnfolder]: 1856/3274 cut-off events. [2023-08-30 16:08:27,861 INFO L131 PetriNetUnfolder]: For 1040/1040 co-relation queries the response was YES. [2023-08-30 16:08:27,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7587 conditions, 3274 events. 1856/3274 cut-off events. For 1040/1040 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 14936 event pairs, 544 based on Foata normal form. 9/2844 useless extension candidates. Maximal degree in co-relation 7560. Up to 2012 conditions per place. [2023-08-30 16:08:27,882 INFO L137 encePairwiseOnDemand]: 461/473 looper letters, 96 selfloop transitions, 30 changer transitions 10/145 dead transitions. [2023-08-30 16:08:27,882 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 145 transitions, 912 flow [2023-08-30 16:08:27,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 16:08:27,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 16:08:27,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1934 transitions. [2023-08-30 16:08:27,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45431054733380316 [2023-08-30 16:08:27,888 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1934 transitions. [2023-08-30 16:08:27,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1934 transitions. [2023-08-30 16:08:27,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:08:27,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1934 transitions. [2023-08-30 16:08:27,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 214.88888888888889) internal successors, (1934), 9 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:27,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 473.0) internal successors, (4730), 10 states have internal predecessors, (4730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:27,900 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 473.0) internal successors, (4730), 10 states have internal predecessors, (4730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:27,900 INFO L175 Difference]: Start difference. First operand has 110 places, 96 transitions, 523 flow. Second operand 9 states and 1934 transitions. [2023-08-30 16:08:27,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 145 transitions, 912 flow [2023-08-30 16:08:27,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 145 transitions, 853 flow, removed 21 selfloop flow, removed 6 redundant places. [2023-08-30 16:08:27,910 INFO L231 Difference]: Finished difference. Result has 111 places, 94 transitions, 563 flow [2023-08-30 16:08:27,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=563, PETRI_PLACES=111, PETRI_TRANSITIONS=94} [2023-08-30 16:08:27,912 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 48 predicate places. [2023-08-30 16:08:27,912 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 94 transitions, 563 flow [2023-08-30 16:08:27,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 203.4) internal successors, (2034), 10 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:27,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:08:27,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:08:27,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 16:08:27,914 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:08:27,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:08:27,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1215939803, now seen corresponding path program 3 times [2023-08-30 16:08:27,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:08:27,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499315066] [2023-08-30 16:08:27,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:08:27,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:08:27,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:08:28,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:08:28,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:08:28,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499315066] [2023-08-30 16:08:28,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499315066] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:08:28,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:08:28,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 16:08:28,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107379033] [2023-08-30 16:08:28,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:08:28,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 16:08:28,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:08:28,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 16:08:28,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-08-30 16:08:29,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 473 [2023-08-30 16:08:29,641 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 94 transitions, 563 flow. Second operand has 10 states, 10 states have (on average 203.4) internal successors, (2034), 10 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:29,641 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:08:29,641 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 473 [2023-08-30 16:08:29,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:08:30,494 INFO L130 PetriNetUnfolder]: 1990/3521 cut-off events. [2023-08-30 16:08:30,494 INFO L131 PetriNetUnfolder]: For 1164/1164 co-relation queries the response was YES. [2023-08-30 16:08:30,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8234 conditions, 3521 events. 1990/3521 cut-off events. For 1164/1164 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 16710 event pairs, 469 based on Foata normal form. 0/3049 useless extension candidates. Maximal degree in co-relation 8207. Up to 1753 conditions per place. [2023-08-30 16:08:30,512 INFO L137 encePairwiseOnDemand]: 461/473 looper letters, 103 selfloop transitions, 37 changer transitions 13/162 dead transitions. [2023-08-30 16:08:30,512 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 162 transitions, 1037 flow [2023-08-30 16:08:30,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 16:08:30,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 16:08:30,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2150 transitions. [2023-08-30 16:08:30,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2023-08-30 16:08:30,519 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2150 transitions. [2023-08-30 16:08:30,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2150 transitions. [2023-08-30 16:08:30,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:08:30,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2150 transitions. [2023-08-30 16:08:30,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 215.0) internal successors, (2150), 10 states have internal predecessors, (2150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:30,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 473.0) internal successors, (5203), 11 states have internal predecessors, (5203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:30,532 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 473.0) internal successors, (5203), 11 states have internal predecessors, (5203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:30,532 INFO L175 Difference]: Start difference. First operand has 111 places, 94 transitions, 563 flow. Second operand 10 states and 2150 transitions. [2023-08-30 16:08:30,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 162 transitions, 1037 flow [2023-08-30 16:08:30,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 162 transitions, 990 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-08-30 16:08:30,542 INFO L231 Difference]: Finished difference. Result has 117 places, 97 transitions, 642 flow [2023-08-30 16:08:30,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=642, PETRI_PLACES=117, PETRI_TRANSITIONS=97} [2023-08-30 16:08:30,543 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 54 predicate places. [2023-08-30 16:08:30,543 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 97 transitions, 642 flow [2023-08-30 16:08:30,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 203.4) internal successors, (2034), 10 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:30,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:08:30,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:08:30,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 16:08:30,544 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:08:30,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:08:30,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1213258613, now seen corresponding path program 4 times [2023-08-30 16:08:30,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:08:30,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729266605] [2023-08-30 16:08:30,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:08:30,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:08:30,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:08:31,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:08:31,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:08:31,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729266605] [2023-08-30 16:08:31,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729266605] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:08:31,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:08:31,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 16:08:31,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912553666] [2023-08-30 16:08:31,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:08:31,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 16:08:31,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:08:31,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 16:08:31,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-08-30 16:08:31,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 473 [2023-08-30 16:08:31,900 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 97 transitions, 642 flow. Second operand has 10 states, 10 states have (on average 203.4) internal successors, (2034), 10 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:31,901 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:08:31,901 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 473 [2023-08-30 16:08:31,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:08:32,462 INFO L130 PetriNetUnfolder]: 2003/3536 cut-off events. [2023-08-30 16:08:32,462 INFO L131 PetriNetUnfolder]: For 1403/1403 co-relation queries the response was YES. [2023-08-30 16:08:32,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8498 conditions, 3536 events. 2003/3536 cut-off events. For 1403/1403 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 16612 event pairs, 526 based on Foata normal form. 0/3057 useless extension candidates. Maximal degree in co-relation 8469. Up to 1753 conditions per place. [2023-08-30 16:08:32,485 INFO L137 encePairwiseOnDemand]: 462/473 looper letters, 95 selfloop transitions, 35 changer transitions 9/148 dead transitions. [2023-08-30 16:08:32,485 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 148 transitions, 1041 flow [2023-08-30 16:08:32,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 16:08:32,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 16:08:32,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1930 transitions. [2023-08-30 16:08:32,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45337091848719757 [2023-08-30 16:08:32,491 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1930 transitions. [2023-08-30 16:08:32,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1930 transitions. [2023-08-30 16:08:32,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:08:32,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1930 transitions. [2023-08-30 16:08:32,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 214.44444444444446) internal successors, (1930), 9 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:32,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 473.0) internal successors, (4730), 10 states have internal predecessors, (4730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:32,502 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 473.0) internal successors, (4730), 10 states have internal predecessors, (4730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:32,502 INFO L175 Difference]: Start difference. First operand has 117 places, 97 transitions, 642 flow. Second operand 9 states and 1930 transitions. [2023-08-30 16:08:32,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 148 transitions, 1041 flow [2023-08-30 16:08:32,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 148 transitions, 990 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-08-30 16:08:32,515 INFO L231 Difference]: Finished difference. Result has 119 places, 98 transitions, 682 flow [2023-08-30 16:08:32,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=682, PETRI_PLACES=119, PETRI_TRANSITIONS=98} [2023-08-30 16:08:32,515 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 56 predicate places. [2023-08-30 16:08:32,515 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 98 transitions, 682 flow [2023-08-30 16:08:32,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 203.4) internal successors, (2034), 10 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:32,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:08:32,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:08:32,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 16:08:32,517 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:08:32,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:08:32,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1209251243, now seen corresponding path program 5 times [2023-08-30 16:08:32,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:08:32,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865898296] [2023-08-30 16:08:32,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:08:32,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:08:32,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:08:33,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:08:33,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:08:33,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865898296] [2023-08-30 16:08:33,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865898296] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:08:33,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:08:33,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 16:08:33,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57441819] [2023-08-30 16:08:33,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:08:33,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 16:08:33,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:08:33,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 16:08:33,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-08-30 16:08:33,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 473 [2023-08-30 16:08:33,719 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 98 transitions, 682 flow. Second operand has 10 states, 10 states have (on average 205.4) internal successors, (2054), 10 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:33,719 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:08:33,719 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 473 [2023-08-30 16:08:33,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:08:34,240 INFO L130 PetriNetUnfolder]: 1990/3505 cut-off events. [2023-08-30 16:08:34,241 INFO L131 PetriNetUnfolder]: For 1594/1594 co-relation queries the response was YES. [2023-08-30 16:08:34,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8548 conditions, 3505 events. 1990/3505 cut-off events. For 1594/1594 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 16354 event pairs, 515 based on Foata normal form. 0/3037 useless extension candidates. Maximal degree in co-relation 8518. Up to 1753 conditions per place. [2023-08-30 16:08:34,256 INFO L137 encePairwiseOnDemand]: 463/473 looper letters, 93 selfloop transitions, 35 changer transitions 10/146 dead transitions. [2023-08-30 16:08:34,256 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 146 transitions, 1065 flow [2023-08-30 16:08:34,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 16:08:34,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 16:08:34,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1946 transitions. [2023-08-30 16:08:34,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45712943387361993 [2023-08-30 16:08:34,262 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1946 transitions. [2023-08-30 16:08:34,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1946 transitions. [2023-08-30 16:08:34,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:08:34,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1946 transitions. [2023-08-30 16:08:34,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 216.22222222222223) internal successors, (1946), 9 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:34,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 473.0) internal successors, (4730), 10 states have internal predecessors, (4730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:34,273 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 473.0) internal successors, (4730), 10 states have internal predecessors, (4730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:34,273 INFO L175 Difference]: Start difference. First operand has 119 places, 98 transitions, 682 flow. Second operand 9 states and 1946 transitions. [2023-08-30 16:08:34,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 146 transitions, 1065 flow [2023-08-30 16:08:34,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 146 transitions, 1024 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-08-30 16:08:34,288 INFO L231 Difference]: Finished difference. Result has 119 places, 96 transitions, 703 flow [2023-08-30 16:08:34,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=633, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=703, PETRI_PLACES=119, PETRI_TRANSITIONS=96} [2023-08-30 16:08:34,289 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 56 predicate places. [2023-08-30 16:08:34,289 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 96 transitions, 703 flow [2023-08-30 16:08:34,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 205.4) internal successors, (2054), 10 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:34,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:08:34,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:08:34,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 16:08:34,290 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:08:34,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:08:34,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1942684503, now seen corresponding path program 1 times [2023-08-30 16:08:34,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:08:34,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615288516] [2023-08-30 16:08:34,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:08:34,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:08:34,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:08:34,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:08:34,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:08:34,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615288516] [2023-08-30 16:08:34,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615288516] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:08:34,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:08:34,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:08:34,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468927855] [2023-08-30 16:08:34,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:08:34,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:08:34,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:08:34,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:08:34,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:08:34,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 473 [2023-08-30 16:08:34,384 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 96 transitions, 703 flow. Second operand has 3 states, 3 states have (on average 248.0) internal successors, (744), 3 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:34,385 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:08:34,385 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 473 [2023-08-30 16:08:34,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:08:34,599 INFO L130 PetriNetUnfolder]: 1298/2415 cut-off events. [2023-08-30 16:08:34,599 INFO L131 PetriNetUnfolder]: For 1569/1574 co-relation queries the response was YES. [2023-08-30 16:08:34,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6303 conditions, 2415 events. 1298/2415 cut-off events. For 1569/1574 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 11433 event pairs, 373 based on Foata normal form. 7/2229 useless extension candidates. Maximal degree in co-relation 6273. Up to 1719 conditions per place. [2023-08-30 16:08:34,608 INFO L137 encePairwiseOnDemand]: 467/473 looper letters, 86 selfloop transitions, 6 changer transitions 1/108 dead transitions. [2023-08-30 16:08:34,608 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 108 transitions, 931 flow [2023-08-30 16:08:34,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:08:34,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:08:34,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 775 transitions. [2023-08-30 16:08:34,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5461592670894997 [2023-08-30 16:08:34,611 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 775 transitions. [2023-08-30 16:08:34,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 775 transitions. [2023-08-30 16:08:34,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:08:34,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 775 transitions. [2023-08-30 16:08:34,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 258.3333333333333) internal successors, (775), 3 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:34,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:34,635 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 473.0) internal successors, (1892), 4 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:34,635 INFO L175 Difference]: Start difference. First operand has 119 places, 96 transitions, 703 flow. Second operand 3 states and 775 transitions. [2023-08-30 16:08:34,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 108 transitions, 931 flow [2023-08-30 16:08:34,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 108 transitions, 859 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-08-30 16:08:34,646 INFO L231 Difference]: Finished difference. Result has 113 places, 96 transitions, 643 flow [2023-08-30 16:08:34,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=643, PETRI_PLACES=113, PETRI_TRANSITIONS=96} [2023-08-30 16:08:34,647 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 50 predicate places. [2023-08-30 16:08:34,647 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 96 transitions, 643 flow [2023-08-30 16:08:34,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 248.0) internal successors, (744), 3 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:34,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:08:34,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:08:34,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 16:08:34,648 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:08:34,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:08:34,648 INFO L85 PathProgramCache]: Analyzing trace with hash 272642884, now seen corresponding path program 1 times [2023-08-30 16:08:34,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:08:34,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48340882] [2023-08-30 16:08:34,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:08:34,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:08:34,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:08:35,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:08:35,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:08:35,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48340882] [2023-08-30 16:08:35,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48340882] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:08:35,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:08:35,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-30 16:08:35,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860931321] [2023-08-30 16:08:35,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:08:35,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 16:08:35,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:08:35,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 16:08:35,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-08-30 16:08:36,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 473 [2023-08-30 16:08:36,399 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 96 transitions, 643 flow. Second operand has 13 states, 13 states have (on average 211.69230769230768) internal successors, (2752), 13 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:36,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:08:36,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 473 [2023-08-30 16:08:36,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:08:37,009 INFO L130 PetriNetUnfolder]: 1301/2438 cut-off events. [2023-08-30 16:08:37,009 INFO L131 PetriNetUnfolder]: For 1316/1318 co-relation queries the response was YES. [2023-08-30 16:08:37,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6350 conditions, 2438 events. 1301/2438 cut-off events. For 1316/1318 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 11549 event pairs, 556 based on Foata normal form. 0/2345 useless extension candidates. Maximal degree in co-relation 6320. Up to 1304 conditions per place. [2023-08-30 16:08:37,017 INFO L137 encePairwiseOnDemand]: 461/473 looper letters, 111 selfloop transitions, 31 changer transitions 11/161 dead transitions. [2023-08-30 16:08:37,017 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 161 transitions, 1130 flow [2023-08-30 16:08:37,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 16:08:37,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 16:08:37,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2425 transitions. [2023-08-30 16:08:37,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46607726311743225 [2023-08-30 16:08:37,023 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2425 transitions. [2023-08-30 16:08:37,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2425 transitions. [2023-08-30 16:08:37,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:08:37,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2425 transitions. [2023-08-30 16:08:37,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 220.45454545454547) internal successors, (2425), 11 states have internal predecessors, (2425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:37,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 473.0) internal successors, (5676), 12 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:37,036 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 473.0) internal successors, (5676), 12 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:37,036 INFO L175 Difference]: Start difference. First operand has 113 places, 96 transitions, 643 flow. Second operand 11 states and 2425 transitions. [2023-08-30 16:08:37,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 161 transitions, 1130 flow [2023-08-30 16:08:37,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 161 transitions, 1120 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:08:37,047 INFO L231 Difference]: Finished difference. Result has 125 places, 103 transitions, 760 flow [2023-08-30 16:08:37,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=637, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=760, PETRI_PLACES=125, PETRI_TRANSITIONS=103} [2023-08-30 16:08:37,047 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 62 predicate places. [2023-08-30 16:08:37,048 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 103 transitions, 760 flow [2023-08-30 16:08:37,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 211.69230769230768) internal successors, (2752), 13 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:08:37,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:08:37,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:08:37,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 16:08:37,049 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:08:37,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:08:37,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1362103832, now seen corresponding path program 2 times [2023-08-30 16:08:37,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:08:37,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727715319] [2023-08-30 16:08:37,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:08:37,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:08:37,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:08:46,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:08:46,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:08:46,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727715319] [2023-08-30 16:08:46,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727715319] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:08:46,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:08:46,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-08-30 16:08:46,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431064678] [2023-08-30 16:08:46,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:08:46,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 16:08:46,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:08:46,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 16:08:46,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2023-08-30 16:09:06,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 473 [2023-08-30 16:09:06,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 103 transitions, 760 flow. Second operand has 18 states, 18 states have (on average 208.94444444444446) internal successors, (3761), 18 states have internal predecessors, (3761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:09:06,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:09:06,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 473 [2023-08-30 16:09:06,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:09:22,963 INFO L130 PetriNetUnfolder]: 1854/3507 cut-off events. [2023-08-30 16:09:22,963 INFO L131 PetriNetUnfolder]: For 1581/1581 co-relation queries the response was YES. [2023-08-30 16:09:22,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8847 conditions, 3507 events. 1854/3507 cut-off events. For 1581/1581 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 18189 event pairs, 484 based on Foata normal form. 0/3415 useless extension candidates. Maximal degree in co-relation 8813. Up to 879 conditions per place. [2023-08-30 16:09:22,975 INFO L137 encePairwiseOnDemand]: 456/473 looper letters, 170 selfloop transitions, 48 changer transitions 14/240 dead transitions. [2023-08-30 16:09:22,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 240 transitions, 1572 flow [2023-08-30 16:09:22,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 16:09:22,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 16:09:22,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3927 transitions. [2023-08-30 16:09:22,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2023-08-30 16:09:22,981 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3927 transitions. [2023-08-30 16:09:22,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3927 transitions. [2023-08-30 16:09:22,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:09:22,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3927 transitions. [2023-08-30 16:09:22,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 218.16666666666666) internal successors, (3927), 18 states have internal predecessors, (3927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:09:22,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 473.0) internal successors, (8987), 19 states have internal predecessors, (8987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:09:22,998 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 473.0) internal successors, (8987), 19 states have internal predecessors, (8987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:09:22,998 INFO L175 Difference]: Start difference. First operand has 125 places, 103 transitions, 760 flow. Second operand 18 states and 3927 transitions. [2023-08-30 16:09:22,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 240 transitions, 1572 flow [2023-08-30 16:09:23,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 240 transitions, 1533 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-30 16:09:23,012 INFO L231 Difference]: Finished difference. Result has 143 places, 114 transitions, 907 flow [2023-08-30 16:09:23,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=723, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=907, PETRI_PLACES=143, PETRI_TRANSITIONS=114} [2023-08-30 16:09:23,013 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 80 predicate places. [2023-08-30 16:09:23,013 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 114 transitions, 907 flow [2023-08-30 16:09:23,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 208.94444444444446) internal successors, (3761), 18 states have internal predecessors, (3761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:09:23,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:09:23,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:09:23,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 16:09:23,015 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:09:23,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:09:23,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1629082922, now seen corresponding path program 3 times [2023-08-30 16:09:23,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:09:23,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78488605] [2023-08-30 16:09:23,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:09:23,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:09:23,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:09:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:09:25,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:09:25,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78488605] [2023-08-30 16:09:25,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78488605] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:09:25,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:09:25,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-08-30 16:09:25,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667363952] [2023-08-30 16:09:25,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:09:25,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 16:09:25,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:09:25,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 16:09:25,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2023-08-30 16:09:26,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 473 [2023-08-30 16:09:26,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 114 transitions, 907 flow. Second operand has 17 states, 17 states have (on average 209.05882352941177) internal successors, (3554), 17 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:09:26,456 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:09:26,456 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 473 [2023-08-30 16:09:26,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:09:27,640 INFO L130 PetriNetUnfolder]: 2209/4184 cut-off events. [2023-08-30 16:09:27,640 INFO L131 PetriNetUnfolder]: For 2368/2368 co-relation queries the response was YES. [2023-08-30 16:09:27,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10953 conditions, 4184 events. 2209/4184 cut-off events. For 2368/2368 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 22081 event pairs, 331 based on Foata normal form. 8/4089 useless extension candidates. Maximal degree in co-relation 10912. Up to 1638 conditions per place. [2023-08-30 16:09:27,654 INFO L137 encePairwiseOnDemand]: 457/473 looper letters, 152 selfloop transitions, 46 changer transitions 14/220 dead transitions. [2023-08-30 16:09:27,654 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 220 transitions, 1630 flow [2023-08-30 16:09:27,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 16:09:27,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 16:09:27,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3270 transitions. [2023-08-30 16:09:27,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4608879492600423 [2023-08-30 16:09:27,659 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3270 transitions. [2023-08-30 16:09:27,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3270 transitions. [2023-08-30 16:09:27,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:09:27,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3270 transitions. [2023-08-30 16:09:27,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 218.0) internal successors, (3270), 15 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:09:27,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 473.0) internal successors, (7568), 16 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:09:27,672 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 473.0) internal successors, (7568), 16 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:09:27,672 INFO L175 Difference]: Start difference. First operand has 143 places, 114 transitions, 907 flow. Second operand 15 states and 3270 transitions. [2023-08-30 16:09:27,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 220 transitions, 1630 flow [2023-08-30 16:09:27,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 220 transitions, 1526 flow, removed 8 selfloop flow, removed 11 redundant places. [2023-08-30 16:09:27,690 INFO L231 Difference]: Finished difference. Result has 150 places, 124 transitions, 1000 flow [2023-08-30 16:09:27,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1000, PETRI_PLACES=150, PETRI_TRANSITIONS=124} [2023-08-30 16:09:27,691 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 87 predicate places. [2023-08-30 16:09:27,691 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 124 transitions, 1000 flow [2023-08-30 16:09:27,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 209.05882352941177) internal successors, (3554), 17 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:09:27,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:09:27,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:09:27,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 16:09:27,693 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:09:27,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:09:27,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1056373008, now seen corresponding path program 1 times [2023-08-30 16:09:27,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:09:27,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060565052] [2023-08-30 16:09:27,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:09:27,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:09:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:09:28,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:09:28,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:09:28,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060565052] [2023-08-30 16:09:28,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060565052] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:09:28,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:09:28,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-30 16:09:28,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456448769] [2023-08-30 16:09:28,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:09:28,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 16:09:28,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:09:28,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 16:09:28,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-08-30 16:09:29,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 473 [2023-08-30 16:09:29,325 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 124 transitions, 1000 flow. Second operand has 13 states, 13 states have (on average 211.76923076923077) internal successors, (2753), 13 states have internal predecessors, (2753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:09:29,325 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:09:29,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 473 [2023-08-30 16:09:29,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:09:30,092 INFO L130 PetriNetUnfolder]: 2479/4685 cut-off events. [2023-08-30 16:09:30,092 INFO L131 PetriNetUnfolder]: For 3306/3308 co-relation queries the response was YES. [2023-08-30 16:09:30,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12502 conditions, 4685 events. 2479/4685 cut-off events. For 3306/3308 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 25588 event pairs, 473 based on Foata normal form. 18/4587 useless extension candidates. Maximal degree in co-relation 12458. Up to 2385 conditions per place. [2023-08-30 16:09:30,113 INFO L137 encePairwiseOnDemand]: 458/473 looper letters, 145 selfloop transitions, 41 changer transitions 10/204 dead transitions. [2023-08-30 16:09:30,113 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 204 transitions, 1642 flow [2023-08-30 16:09:30,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 16:09:30,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 16:09:30,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2649 transitions. [2023-08-30 16:09:30,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4667019027484144 [2023-08-30 16:09:30,116 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2649 transitions. [2023-08-30 16:09:30,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2649 transitions. [2023-08-30 16:09:30,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:09:30,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2649 transitions. [2023-08-30 16:09:30,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 220.75) internal successors, (2649), 12 states have internal predecessors, (2649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:09:30,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 473.0) internal successors, (6149), 13 states have internal predecessors, (6149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:09:30,124 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 473.0) internal successors, (6149), 13 states have internal predecessors, (6149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:09:30,125 INFO L175 Difference]: Start difference. First operand has 150 places, 124 transitions, 1000 flow. Second operand 12 states and 2649 transitions. [2023-08-30 16:09:30,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 204 transitions, 1642 flow [2023-08-30 16:09:30,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 204 transitions, 1559 flow, removed 5 selfloop flow, removed 10 redundant places. [2023-08-30 16:09:30,147 INFO L231 Difference]: Finished difference. Result has 154 places, 133 transitions, 1113 flow [2023-08-30 16:09:30,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=925, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1113, PETRI_PLACES=154, PETRI_TRANSITIONS=133} [2023-08-30 16:09:30,147 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 91 predicate places. [2023-08-30 16:09:30,148 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 133 transitions, 1113 flow [2023-08-30 16:09:30,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 211.76923076923077) internal successors, (2753), 13 states have internal predecessors, (2753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:09:30,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:09:30,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:09:30,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 16:09:30,149 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:09:30,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:09:30,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1241534900, now seen corresponding path program 2 times [2023-08-30 16:09:30,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:09:30,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388688591] [2023-08-30 16:09:30,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:09:30,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:09:30,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:09:31,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:09:31,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:09:31,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388688591] [2023-08-30 16:09:31,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388688591] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:09:31,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:09:31,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-30 16:09:31,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034660540] [2023-08-30 16:09:31,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:09:31,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 16:09:31,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:09:31,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 16:09:31,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-08-30 16:09:31,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 473 [2023-08-30 16:09:31,806 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 133 transitions, 1113 flow. Second operand has 13 states, 13 states have (on average 211.76923076923077) internal successors, (2753), 13 states have internal predecessors, (2753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:09:31,806 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:09:31,806 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 473 [2023-08-30 16:09:31,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:09:32,382 INFO L130 PetriNetUnfolder]: 1622/3067 cut-off events. [2023-08-30 16:09:32,383 INFO L131 PetriNetUnfolder]: For 3514/3514 co-relation queries the response was YES. [2023-08-30 16:09:32,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8824 conditions, 3067 events. 1622/3067 cut-off events. For 3514/3514 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 15072 event pairs, 345 based on Foata normal form. 21/3013 useless extension candidates. Maximal degree in co-relation 8777. Up to 1151 conditions per place. [2023-08-30 16:09:32,399 INFO L137 encePairwiseOnDemand]: 462/473 looper letters, 120 selfloop transitions, 34 changer transitions 11/173 dead transitions. [2023-08-30 16:09:32,400 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 173 transitions, 1444 flow [2023-08-30 16:09:32,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 16:09:32,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 16:09:32,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2421 transitions. [2023-08-30 16:09:32,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4653084758793004 [2023-08-30 16:09:32,402 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2421 transitions. [2023-08-30 16:09:32,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2421 transitions. [2023-08-30 16:09:32,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:09:32,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2421 transitions. [2023-08-30 16:09:32,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 220.0909090909091) internal successors, (2421), 11 states have internal predecessors, (2421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:09:32,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 473.0) internal successors, (5676), 12 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:09:32,408 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 473.0) internal successors, (5676), 12 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:09:32,408 INFO L175 Difference]: Start difference. First operand has 154 places, 133 transitions, 1113 flow. Second operand 11 states and 2421 transitions. [2023-08-30 16:09:32,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 173 transitions, 1444 flow [2023-08-30 16:09:32,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 173 transitions, 1344 flow, removed 14 selfloop flow, removed 14 redundant places. [2023-08-30 16:09:32,431 INFO L231 Difference]: Finished difference. Result has 145 places, 116 transitions, 944 flow [2023-08-30 16:09:32,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=876, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=944, PETRI_PLACES=145, PETRI_TRANSITIONS=116} [2023-08-30 16:09:32,432 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 82 predicate places. [2023-08-30 16:09:32,432 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 116 transitions, 944 flow [2023-08-30 16:09:32,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 211.76923076923077) internal successors, (2753), 13 states have internal predecessors, (2753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:09:32,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:09:32,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:09:32,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 16:09:32,433 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:09:32,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:09:32,434 INFO L85 PathProgramCache]: Analyzing trace with hash -540729123, now seen corresponding path program 1 times [2023-08-30 16:09:32,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:09:32,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042038075] [2023-08-30 16:09:32,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:09:32,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:09:32,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:09:33,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:09:33,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:09:33,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042038075] [2023-08-30 16:09:33,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042038075] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:09:33,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:09:33,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-08-30 16:09:33,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107719360] [2023-08-30 16:09:33,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:09:33,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 16:09:33,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:09:33,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 16:09:33,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2023-08-30 16:09:34,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 473 [2023-08-30 16:09:34,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 116 transitions, 944 flow. Second operand has 16 states, 16 states have (on average 209.25) internal successors, (3348), 16 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:09:34,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:09:34,743 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 473 [2023-08-30 16:09:34,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:09:35,397 INFO L130 PetriNetUnfolder]: 1788/3388 cut-off events. [2023-08-30 16:09:35,397 INFO L131 PetriNetUnfolder]: For 3077/3077 co-relation queries the response was YES. [2023-08-30 16:09:35,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9340 conditions, 3388 events. 1788/3388 cut-off events. For 3077/3077 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 16770 event pairs, 215 based on Foata normal form. 8/3312 useless extension candidates. Maximal degree in co-relation 9299. Up to 816 conditions per place. [2023-08-30 16:09:35,412 INFO L137 encePairwiseOnDemand]: 460/473 looper letters, 140 selfloop transitions, 42 changer transitions 12/202 dead transitions. [2023-08-30 16:09:35,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 202 transitions, 1544 flow [2023-08-30 16:09:35,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 16:09:35,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 16:09:35,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2843 transitions. [2023-08-30 16:09:35,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4623516018864856 [2023-08-30 16:09:35,415 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2843 transitions. [2023-08-30 16:09:35,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2843 transitions. [2023-08-30 16:09:35,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:09:35,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2843 transitions. [2023-08-30 16:09:35,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 218.69230769230768) internal successors, (2843), 13 states have internal predecessors, (2843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:09:35,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 473.0) internal successors, (6622), 14 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:09:35,421 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 473.0) internal successors, (6622), 14 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:09:35,421 INFO L175 Difference]: Start difference. First operand has 145 places, 116 transitions, 944 flow. Second operand 13 states and 2843 transitions. [2023-08-30 16:09:35,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 202 transitions, 1544 flow [2023-08-30 16:09:35,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 202 transitions, 1476 flow, removed 0 selfloop flow, removed 10 redundant places. [2023-08-30 16:09:35,434 INFO L231 Difference]: Finished difference. Result has 149 places, 119 transitions, 994 flow [2023-08-30 16:09:35,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=876, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=994, PETRI_PLACES=149, PETRI_TRANSITIONS=119} [2023-08-30 16:09:35,435 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 86 predicate places. [2023-08-30 16:09:35,435 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 119 transitions, 994 flow [2023-08-30 16:09:35,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 209.25) internal successors, (3348), 16 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:09:35,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:09:35,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:09:35,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-30 16:09:35,436 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:09:35,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:09:35,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1142379959, now seen corresponding path program 1 times [2023-08-30 16:09:35,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:09:35,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594708569] [2023-08-30 16:09:35,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:09:35,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:09:35,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15