./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/48_ticket_lock_low_contention_vs.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-ext/48_ticket_lock_low_contention_vs.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 31f5db4bc5916150a86a586587dbeca1bc7aa37b414274f5dc02856908270171 --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 16:38:13,031 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 16:38:13,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 16:38:13,067 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 16:38:13,067 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 16:38:13,069 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 16:38:13,071 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 16:38:13,073 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 16:38:13,074 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 16:38:13,077 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 16:38:13,078 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 16:38:13,080 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 16:38:13,080 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 16:38:13,082 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 16:38:13,083 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 16:38:13,089 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 16:38:13,090 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 16:38:13,090 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 16:38:13,091 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 16:38:13,092 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 16:38:13,093 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 16:38:13,094 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 16:38:13,094 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 16:38:13,095 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 16:38:13,097 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 16:38:13,097 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 16:38:13,098 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 16:38:13,098 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 16:38:13,098 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 16:38:13,099 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 16:38:13,099 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 16:38:13,100 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 16:38:13,100 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 16:38:13,104 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 16:38:13,105 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 16:38:13,106 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 16:38:13,107 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 16:38:13,107 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 16:38:13,107 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 16:38:13,108 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 16:38:13,108 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 16:38:13,109 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 16:38:13,131 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 16:38:13,131 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 16:38:13,132 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 16:38:13,132 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 16:38:13,133 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 16:38:13,133 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 16:38:13,134 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 16:38:13,134 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 16:38:13,134 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 16:38:13,134 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 16:38:13,135 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 16:38:13,135 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 16:38:13,135 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 16:38:13,136 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 16:38:13,136 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 16:38:13,136 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 16:38:13,136 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 16:38:13,136 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 16:38:13,136 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 16:38:13,136 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 16:38:13,137 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 16:38:13,137 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 16:38:13,137 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 16:38:13,137 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 16:38:13,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:38:13,137 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 16:38:13,137 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 16:38:13,138 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 16:38:13,138 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 16:38:13,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 16:38:13,138 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 16:38:13,138 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 16:38:13,138 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 16:38:13,139 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 16:38:13,139 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 16:38:13,139 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31f5db4bc5916150a86a586587dbeca1bc7aa37b414274f5dc02856908270171 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 16:38:13,376 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 16:38:13,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 16:38:13,388 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 16:38:13,389 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 16:38:13,389 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 16:38:13,401 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/48_ticket_lock_low_contention_vs.i [2023-08-30 16:38:14,509 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 16:38:14,751 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 16:38:14,752 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/48_ticket_lock_low_contention_vs.i [2023-08-30 16:38:14,759 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b9028161/3a39075c9d0c4e0cb297498ff7514f33/FLAG056d5b5e9 [2023-08-30 16:38:14,769 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b9028161/3a39075c9d0c4e0cb297498ff7514f33 [2023-08-30 16:38:14,772 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 16:38:14,773 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 16:38:14,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 16:38:14,773 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 16:38:14,778 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 16:38:14,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:38:14" (1/1) ... [2023-08-30 16:38:14,779 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5932aa9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:38:14, skipping insertion in model container [2023-08-30 16:38:14,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:38:14" (1/1) ... [2023-08-30 16:38:14,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 16:38:14,822 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 16:38:14,962 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-30 16:38:15,065 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-ext/48_ticket_lock_low_contention_vs.i[30893,30906] [2023-08-30 16:38:15,074 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:38:15,080 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 16:38:15,103 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-30 16:38:15,125 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-ext/48_ticket_lock_low_contention_vs.i[30893,30906] [2023-08-30 16:38:15,128 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:38:15,155 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 16:38:15,156 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 16:38:15,156 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 16:38:15,160 INFO L208 MainTranslator]: Completed translation [2023-08-30 16:38:15,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:38:15 WrapperNode [2023-08-30 16:38:15,161 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 16:38:15,162 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 16:38:15,162 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 16:38:15,162 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 16:38:15,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:38:15" (1/1) ... [2023-08-30 16:38:15,191 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:38:15" (1/1) ... [2023-08-30 16:38:15,205 INFO L138 Inliner]: procedures = 173, calls = 24, calls flagged for inlining = 5, calls inlined = 7, statements flattened = 109 [2023-08-30 16:38:15,207 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 16:38:15,208 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 16:38:15,208 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 16:38:15,208 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 16:38:15,214 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:38:15" (1/1) ... [2023-08-30 16:38:15,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:38:15" (1/1) ... [2023-08-30 16:38:15,219 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:38:15" (1/1) ... [2023-08-30 16:38:15,219 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:38:15" (1/1) ... [2023-08-30 16:38:15,232 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:38:15" (1/1) ... [2023-08-30 16:38:15,238 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:38:15" (1/1) ... [2023-08-30 16:38:15,240 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:38:15" (1/1) ... [2023-08-30 16:38:15,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:38:15" (1/1) ... [2023-08-30 16:38:15,246 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 16:38:15,250 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 16:38:15,251 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 16:38:15,251 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 16:38:15,251 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:38:15" (1/1) ... [2023-08-30 16:38:15,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:38:15,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:38:15,301 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 16:38:15,307 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 16:38:15,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 16:38:15,329 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-30 16:38:15,329 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-30 16:38:15,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 16:38:15,329 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 16:38:15,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 16:38:15,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 16:38:15,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 16:38:15,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 16:38:15,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 16:38:15,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 16:38:15,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 16:38:15,331 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 16:38:15,407 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 16:38:15,408 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 16:38:15,551 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 16:38:15,660 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 16:38:15,667 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 16:38:15,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:38:15 BoogieIcfgContainer [2023-08-30 16:38:15,669 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 16:38:15,670 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 16:38:15,671 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 16:38:15,673 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 16:38:15,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:38:14" (1/3) ... [2023-08-30 16:38:15,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42aca6ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:38:15, skipping insertion in model container [2023-08-30 16:38:15,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:38:15" (2/3) ... [2023-08-30 16:38:15,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42aca6ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:38:15, skipping insertion in model container [2023-08-30 16:38:15,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:38:15" (3/3) ... [2023-08-30 16:38:15,675 INFO L112 eAbstractionObserver]: Analyzing ICFG 48_ticket_lock_low_contention_vs.i [2023-08-30 16:38:15,680 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 16:38:15,685 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 16:38:15,685 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-30 16:38:15,685 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 16:38:15,722 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:38:15,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 70 transitions, 145 flow [2023-08-30 16:38:15,791 INFO L130 PetriNetUnfolder]: 8/106 cut-off events. [2023-08-30 16:38:15,791 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:38:15,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 106 events. 8/106 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 212 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 55. Up to 4 conditions per place. [2023-08-30 16:38:15,795 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 70 transitions, 145 flow [2023-08-30 16:38:15,797 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 70 transitions, 145 flow [2023-08-30 16:38:15,799 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:38:15,805 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 70 transitions, 145 flow [2023-08-30 16:38:15,806 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 70 transitions, 145 flow [2023-08-30 16:38:15,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 70 transitions, 145 flow [2023-08-30 16:38:15,823 INFO L130 PetriNetUnfolder]: 8/106 cut-off events. [2023-08-30 16:38:15,823 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:38:15,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 106 events. 8/106 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 212 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 55. Up to 4 conditions per place. [2023-08-30 16:38:15,824 INFO L119 LiptonReduction]: Number of co-enabled transitions 1326 [2023-08-30 16:38:16,777 INFO L134 LiptonReduction]: Checked pairs total: 3786 [2023-08-30 16:38:16,778 INFO L136 LiptonReduction]: Total number of compositions: 50 [2023-08-30 16:38:16,795 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:38:16,801 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;@2db21795, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:38:16,801 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 16:38:16,810 INFO L130 PetriNetUnfolder]: 4/21 cut-off events. [2023-08-30 16:38:16,811 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:38:16,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:16,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 16:38:16,812 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:38:16,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:16,817 INFO L85 PathProgramCache]: Analyzing trace with hash 2028827622, now seen corresponding path program 1 times [2023-08-30 16:38:16,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:16,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666217587] [2023-08-30 16:38:16,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:16,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:16,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:17,100 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 16:38:17,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:17,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666217587] [2023-08-30 16:38:17,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666217587] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:38:17,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:38:17,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:38:17,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181248394] [2023-08-30 16:38:17,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:38:17,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:38:17,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:38:17,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:38:17,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:38:17,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 120 [2023-08-30 16:38:17,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 30 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 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 16:38:17,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:38:17,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 120 [2023-08-30 16:38:17,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:38:17,218 INFO L130 PetriNetUnfolder]: 100/232 cut-off events. [2023-08-30 16:38:17,218 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:38:17,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 450 conditions, 232 events. 100/232 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 812 event pairs, 59 based on Foata normal form. 20/223 useless extension candidates. Maximal degree in co-relation 418. Up to 178 conditions per place. [2023-08-30 16:38:17,220 INFO L137 encePairwiseOnDemand]: 112/120 looper letters, 30 selfloop transitions, 4 changer transitions 9/45 dead transitions. [2023-08-30 16:38:17,220 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 45 transitions, 179 flow [2023-08-30 16:38:17,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:38:17,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:38:17,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 195 transitions. [2023-08-30 16:38:17,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2023-08-30 16:38:17,229 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 195 transitions. [2023-08-30 16:38:17,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 195 transitions. [2023-08-30 16:38:17,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:38:17,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 195 transitions. [2023-08-30 16:38:17,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 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 16:38:17,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 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 16:38:17,236 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 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 16:38:17,238 INFO L175 Difference]: Start difference. First operand has 29 places, 30 transitions, 65 flow. Second operand 3 states and 195 transitions. [2023-08-30 16:38:17,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 45 transitions, 179 flow [2023-08-30 16:38:17,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 45 transitions, 179 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 16:38:17,240 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 81 flow [2023-08-30 16:38:17,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2023-08-30 16:38:17,246 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2023-08-30 16:38:17,246 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 81 flow [2023-08-30 16:38:17,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 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 16:38:17,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:17,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:38:17,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 16:38:17,250 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:38:17,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:17,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1112363633, now seen corresponding path program 1 times [2023-08-30 16:38:17,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:17,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750135415] [2023-08-30 16:38:17,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:17,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:17,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:17,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:38:17,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:17,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750135415] [2023-08-30 16:38:17,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750135415] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:38:17,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:38:17,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:38:17,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248045920] [2023-08-30 16:38:17,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:38:17,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:38:17,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:38:17,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:38:17,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:38:17,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 120 [2023-08-30 16:38:17,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 81 flow. Second operand has 5 states, 5 states have (on average 54.2) internal successors, (271), 5 states have internal predecessors, (271), 0 states have call successors, (0), 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 16:38:17,584 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:38:17,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 120 [2023-08-30 16:38:17,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:38:17,677 INFO L130 PetriNetUnfolder]: 67/186 cut-off events. [2023-08-30 16:38:17,677 INFO L131 PetriNetUnfolder]: For 33/39 co-relation queries the response was YES. [2023-08-30 16:38:17,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 186 events. 67/186 cut-off events. For 33/39 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 668 event pairs, 18 based on Foata normal form. 6/165 useless extension candidates. Maximal degree in co-relation 366. Up to 94 conditions per place. [2023-08-30 16:38:17,682 INFO L137 encePairwiseOnDemand]: 114/120 looper letters, 20 selfloop transitions, 3 changer transitions 18/49 dead transitions. [2023-08-30 16:38:17,682 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 49 transitions, 207 flow [2023-08-30 16:38:17,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 16:38:17,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 16:38:17,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 302 transitions. [2023-08-30 16:38:17,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5033333333333333 [2023-08-30 16:38:17,687 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 302 transitions. [2023-08-30 16:38:17,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 302 transitions. [2023-08-30 16:38:17,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:38:17,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 302 transitions. [2023-08-30 16:38:17,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 60.4) internal successors, (302), 5 states have internal predecessors, (302), 0 states have call successors, (0), 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 16:38:17,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 120.0) internal successors, (720), 6 states have internal predecessors, (720), 0 states have call successors, (0), 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 16:38:17,693 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 120.0) internal successors, (720), 6 states have internal predecessors, (720), 0 states have call successors, (0), 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 16:38:17,693 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 81 flow. Second operand 5 states and 302 transitions. [2023-08-30 16:38:17,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 49 transitions, 207 flow [2023-08-30 16:38:17,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 49 transitions, 199 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:38:17,695 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 89 flow [2023-08-30 16:38:17,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=89, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2023-08-30 16:38:17,696 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 5 predicate places. [2023-08-30 16:38:17,696 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 89 flow [2023-08-30 16:38:17,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 54.2) internal successors, (271), 5 states have internal predecessors, (271), 0 states have call successors, (0), 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 16:38:17,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:17,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:38:17,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 16:38:17,697 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:38:17,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:17,698 INFO L85 PathProgramCache]: Analyzing trace with hash 56225659, now seen corresponding path program 2 times [2023-08-30 16:38:17,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:17,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918012498] [2023-08-30 16:38:17,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:17,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:17,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:17,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:38:17,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:17,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918012498] [2023-08-30 16:38:17,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918012498] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:38:17,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:38:17,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:38:17,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017223205] [2023-08-30 16:38:17,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:38:17,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:38:17,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:38:17,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:38:17,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:38:17,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 120 [2023-08-30 16:38:17,906 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 89 flow. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 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 16:38:17,906 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:38:17,906 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 120 [2023-08-30 16:38:17,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:38:17,949 INFO L130 PetriNetUnfolder]: 23/72 cut-off events. [2023-08-30 16:38:17,949 INFO L131 PetriNetUnfolder]: For 13/15 co-relation queries the response was YES. [2023-08-30 16:38:17,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 72 events. 23/72 cut-off events. For 13/15 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 123 event pairs, 7 based on Foata normal form. 2/67 useless extension candidates. Maximal degree in co-relation 148. Up to 18 conditions per place. [2023-08-30 16:38:17,951 INFO L137 encePairwiseOnDemand]: 115/120 looper letters, 0 selfloop transitions, 0 changer transitions 29/29 dead transitions. [2023-08-30 16:38:17,951 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 133 flow [2023-08-30 16:38:17,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 16:38:17,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 16:38:17,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 279 transitions. [2023-08-30 16:38:17,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465 [2023-08-30 16:38:17,952 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 279 transitions. [2023-08-30 16:38:17,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 279 transitions. [2023-08-30 16:38:17,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:38:17,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 279 transitions. [2023-08-30 16:38:17,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 55.8) internal successors, (279), 5 states have internal predecessors, (279), 0 states have call successors, (0), 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 16:38:17,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 120.0) internal successors, (720), 6 states have internal predecessors, (720), 0 states have call successors, (0), 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 16:38:17,954 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 120.0) internal successors, (720), 6 states have internal predecessors, (720), 0 states have call successors, (0), 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 16:38:17,955 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 89 flow. Second operand 5 states and 279 transitions. [2023-08-30 16:38:17,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 133 flow [2023-08-30 16:38:17,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 29 transitions, 113 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-08-30 16:38:17,956 INFO L231 Difference]: Finished difference. Result has 30 places, 0 transitions, 0 flow [2023-08-30 16:38:17,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=30, PETRI_TRANSITIONS=0} [2023-08-30 16:38:17,957 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2023-08-30 16:38:17,959 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 0 transitions, 0 flow [2023-08-30 16:38:17,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 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 16:38:17,961 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-30 16:38:17,961 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-30 16:38:17,961 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-30 16:38:17,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 16:38:17,962 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-08-30 16:38:17,963 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-08-30 16:38:17,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 70 transitions, 145 flow [2023-08-30 16:38:17,974 INFO L130 PetriNetUnfolder]: 8/106 cut-off events. [2023-08-30 16:38:17,975 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:38:17,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 106 events. 8/106 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 212 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 55. Up to 4 conditions per place. [2023-08-30 16:38:17,976 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 70 transitions, 145 flow [2023-08-30 16:38:17,976 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 70 transitions, 145 flow [2023-08-30 16:38:17,977 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:38:17,977 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 70 transitions, 145 flow [2023-08-30 16:38:17,977 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 70 transitions, 145 flow [2023-08-30 16:38:17,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 70 transitions, 145 flow [2023-08-30 16:38:17,987 INFO L130 PetriNetUnfolder]: 8/106 cut-off events. [2023-08-30 16:38:17,987 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:38:17,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 106 events. 8/106 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 212 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 55. Up to 4 conditions per place. [2023-08-30 16:38:17,989 INFO L119 LiptonReduction]: Number of co-enabled transitions 1326 [2023-08-30 16:38:18,881 INFO L134 LiptonReduction]: Checked pairs total: 4338 [2023-08-30 16:38:18,881 INFO L136 LiptonReduction]: Total number of compositions: 50 [2023-08-30 16:38:18,882 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 16:38:18,883 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;@2db21795, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:38:18,883 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 16:38:18,884 INFO L130 PetriNetUnfolder]: 2/16 cut-off events. [2023-08-30 16:38:18,885 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:38:18,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:18,885 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 16:38:18,885 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:38:18,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:18,885 INFO L85 PathProgramCache]: Analyzing trace with hash -763321289, now seen corresponding path program 1 times [2023-08-30 16:38:18,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:18,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617848686] [2023-08-30 16:38:18,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:18,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:18,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:38:18,894 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:38:18,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:38:18,913 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:38:18,913 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:38:18,913 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 16:38:18,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 16:38:18,913 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:38:18,914 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 16:38:18,914 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 16:38:18,914 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 16:38:18,936 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:38:18,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 88 transitions, 188 flow [2023-08-30 16:38:18,960 INFO L130 PetriNetUnfolder]: 13/162 cut-off events. [2023-08-30 16:38:18,960 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:38:18,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 162 events. 13/162 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 410 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 107. Up to 6 conditions per place. [2023-08-30 16:38:18,961 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 88 transitions, 188 flow [2023-08-30 16:38:18,961 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 88 transitions, 188 flow [2023-08-30 16:38:18,961 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:38:18,962 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 88 transitions, 188 flow [2023-08-30 16:38:18,962 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 88 transitions, 188 flow [2023-08-30 16:38:18,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 88 transitions, 188 flow [2023-08-30 16:38:18,973 INFO L130 PetriNetUnfolder]: 13/162 cut-off events. [2023-08-30 16:38:18,974 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:38:18,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 162 events. 13/162 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 410 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 107. Up to 6 conditions per place. [2023-08-30 16:38:18,976 INFO L119 LiptonReduction]: Number of co-enabled transitions 3264 [2023-08-30 16:38:19,852 INFO L134 LiptonReduction]: Checked pairs total: 10244 [2023-08-30 16:38:19,852 INFO L136 LiptonReduction]: Total number of compositions: 57 [2023-08-30 16:38:19,853 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:38:19,854 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;@2db21795, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:38:19,854 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 16:38:19,856 INFO L130 PetriNetUnfolder]: 3/19 cut-off events. [2023-08-30 16:38:19,856 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 16:38:19,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:19,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 16:38:19,856 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:38:19,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:19,857 INFO L85 PathProgramCache]: Analyzing trace with hash -260600421, now seen corresponding path program 1 times [2023-08-30 16:38:19,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:19,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239810861] [2023-08-30 16:38:19,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:19,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:19,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:19,882 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 16:38:19,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:19,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239810861] [2023-08-30 16:38:19,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239810861] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:38:19,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:38:19,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:38:19,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482721524] [2023-08-30 16:38:19,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:38:19,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:38:19,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:38:19,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:38:19,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:38:19,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 145 [2023-08-30 16:38:19,895 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 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 16:38:19,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:38:19,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 145 [2023-08-30 16:38:19,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:38:20,117 INFO L130 PetriNetUnfolder]: 1886/3179 cut-off events. [2023-08-30 16:38:20,118 INFO L131 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2023-08-30 16:38:20,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6145 conditions, 3179 events. 1886/3179 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 17988 event pairs, 1093 based on Foata normal form. 263/3068 useless extension candidates. Maximal degree in co-relation 3762. Up to 2293 conditions per place. [2023-08-30 16:38:20,128 INFO L137 encePairwiseOnDemand]: 133/145 looper letters, 53 selfloop transitions, 6 changer transitions 0/65 dead transitions. [2023-08-30 16:38:20,128 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 65 transitions, 265 flow [2023-08-30 16:38:20,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:38:20,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:38:20,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 239 transitions. [2023-08-30 16:38:20,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5494252873563218 [2023-08-30 16:38:20,129 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 239 transitions. [2023-08-30 16:38:20,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 239 transitions. [2023-08-30 16:38:20,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:38:20,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 239 transitions. [2023-08-30 16:38:20,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:38:20,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 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 16:38:20,131 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 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 16:38:20,131 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 100 flow. Second operand 3 states and 239 transitions. [2023-08-30 16:38:20,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 65 transitions, 265 flow [2023-08-30 16:38:20,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 65 transitions, 263 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 16:38:20,133 INFO L231 Difference]: Finished difference. Result has 44 places, 44 transitions, 140 flow [2023-08-30 16:38:20,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=44, PETRI_TRANSITIONS=44} [2023-08-30 16:38:20,134 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2023-08-30 16:38:20,134 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 44 transitions, 140 flow [2023-08-30 16:38:20,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 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 16:38:20,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:20,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:38:20,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 16:38:20,134 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:38:20,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:20,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1430371579, now seen corresponding path program 1 times [2023-08-30 16:38:20,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:20,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578827081] [2023-08-30 16:38:20,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:20,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:20,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:20,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:38:20,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:20,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578827081] [2023-08-30 16:38:20,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578827081] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:38:20,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:38:20,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:38:20,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111224081] [2023-08-30 16:38:20,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:38:20,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:38:20,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:38:20,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:38:20,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:38:20,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 145 [2023-08-30 16:38:20,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 44 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 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 16:38:20,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:38:20,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 145 [2023-08-30 16:38:20,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:38:20,443 INFO L130 PetriNetUnfolder]: 1159/2261 cut-off events. [2023-08-30 16:38:20,443 INFO L131 PetriNetUnfolder]: For 466/550 co-relation queries the response was YES. [2023-08-30 16:38:20,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4890 conditions, 2261 events. 1159/2261 cut-off events. For 466/550 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 14137 event pairs, 393 based on Foata normal form. 71/2016 useless extension candidates. Maximal degree in co-relation 4012. Up to 1449 conditions per place. [2023-08-30 16:38:20,454 INFO L137 encePairwiseOnDemand]: 136/145 looper letters, 48 selfloop transitions, 15 changer transitions 0/81 dead transitions. [2023-08-30 16:38:20,454 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 81 transitions, 350 flow [2023-08-30 16:38:20,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 16:38:20,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 16:38:20,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 379 transitions. [2023-08-30 16:38:20,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227586206896552 [2023-08-30 16:38:20,457 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 379 transitions. [2023-08-30 16:38:20,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 379 transitions. [2023-08-30 16:38:20,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:38:20,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 379 transitions. [2023-08-30 16:38:20,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 75.8) internal successors, (379), 5 states have internal predecessors, (379), 0 states have call successors, (0), 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 16:38:20,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 145.0) internal successors, (870), 6 states have internal predecessors, (870), 0 states have call successors, (0), 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 16:38:20,460 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 145.0) internal successors, (870), 6 states have internal predecessors, (870), 0 states have call successors, (0), 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 16:38:20,460 INFO L175 Difference]: Start difference. First operand has 44 places, 44 transitions, 140 flow. Second operand 5 states and 379 transitions. [2023-08-30 16:38:20,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 81 transitions, 350 flow [2023-08-30 16:38:20,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 81 transitions, 338 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:38:20,464 INFO L231 Difference]: Finished difference. Result has 48 places, 58 transitions, 217 flow [2023-08-30 16:38:20,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=217, PETRI_PLACES=48, PETRI_TRANSITIONS=58} [2023-08-30 16:38:20,464 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 5 predicate places. [2023-08-30 16:38:20,465 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 58 transitions, 217 flow [2023-08-30 16:38:20,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 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 16:38:20,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:20,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:38:20,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 16:38:20,465 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:38:20,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:20,466 INFO L85 PathProgramCache]: Analyzing trace with hash -181687807, now seen corresponding path program 2 times [2023-08-30 16:38:20,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:20,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810032067] [2023-08-30 16:38:20,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:20,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:20,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:20,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:38:20,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:20,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810032067] [2023-08-30 16:38:20,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810032067] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:38:20,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:38:20,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:38:20,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443286273] [2023-08-30 16:38:20,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:38:20,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:38:20,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:38:20,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:38:20,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:38:20,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 145 [2023-08-30 16:38:20,605 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 58 transitions, 217 flow. Second operand has 5 states, 5 states have (on average 64.0) internal successors, (320), 5 states have internal predecessors, (320), 0 states have call successors, (0), 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 16:38:20,605 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:38:20,605 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 145 [2023-08-30 16:38:20,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:38:20,795 INFO L130 PetriNetUnfolder]: 1090/2092 cut-off events. [2023-08-30 16:38:20,795 INFO L131 PetriNetUnfolder]: For 659/810 co-relation queries the response was YES. [2023-08-30 16:38:20,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4847 conditions, 2092 events. 1090/2092 cut-off events. For 659/810 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12769 event pairs, 376 based on Foata normal form. 103/1992 useless extension candidates. Maximal degree in co-relation 3998. Up to 1369 conditions per place. [2023-08-30 16:38:20,806 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 53 selfloop transitions, 14 changer transitions 0/85 dead transitions. [2023-08-30 16:38:20,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 85 transitions, 431 flow [2023-08-30 16:38:20,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 16:38:20,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 16:38:20,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 373 transitions. [2023-08-30 16:38:20,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5144827586206897 [2023-08-30 16:38:20,808 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 373 transitions. [2023-08-30 16:38:20,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 373 transitions. [2023-08-30 16:38:20,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:38:20,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 373 transitions. [2023-08-30 16:38:20,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 74.6) internal successors, (373), 5 states have internal predecessors, (373), 0 states have call successors, (0), 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 16:38:20,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 145.0) internal successors, (870), 6 states have internal predecessors, (870), 0 states have call successors, (0), 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 16:38:20,810 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 145.0) internal successors, (870), 6 states have internal predecessors, (870), 0 states have call successors, (0), 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 16:38:20,811 INFO L175 Difference]: Start difference. First operand has 48 places, 58 transitions, 217 flow. Second operand 5 states and 373 transitions. [2023-08-30 16:38:20,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 85 transitions, 431 flow [2023-08-30 16:38:20,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 85 transitions, 431 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 16:38:20,813 INFO L231 Difference]: Finished difference. Result has 53 places, 62 transitions, 276 flow [2023-08-30 16:38:20,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=276, PETRI_PLACES=53, PETRI_TRANSITIONS=62} [2023-08-30 16:38:20,814 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 10 predicate places. [2023-08-30 16:38:20,814 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 62 transitions, 276 flow [2023-08-30 16:38:20,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.0) internal successors, (320), 5 states have internal predecessors, (320), 0 states have call successors, (0), 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 16:38:20,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:20,814 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:38:20,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 16:38:20,815 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:38:20,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:20,815 INFO L85 PathProgramCache]: Analyzing trace with hash 96414718, now seen corresponding path program 1 times [2023-08-30 16:38:20,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:20,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333290831] [2023-08-30 16:38:20,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:20,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:20,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:20,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:38:20,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:20,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333290831] [2023-08-30 16:38:20,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333290831] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:38:20,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:38:20,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:38:20,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760082544] [2023-08-30 16:38:20,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:38:20,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:38:20,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:38:20,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:38:20,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:38:20,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 145 [2023-08-30 16:38:20,982 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 62 transitions, 276 flow. Second operand has 5 states, 5 states have (on average 65.2) internal successors, (326), 5 states have internal predecessors, (326), 0 states have call successors, (0), 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 16:38:20,983 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:38:20,983 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 145 [2023-08-30 16:38:20,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:38:21,163 INFO L130 PetriNetUnfolder]: 965/1884 cut-off events. [2023-08-30 16:38:21,165 INFO L131 PetriNetUnfolder]: For 1111/1276 co-relation queries the response was YES. [2023-08-30 16:38:21,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4680 conditions, 1884 events. 965/1884 cut-off events. For 1111/1276 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 11239 event pairs, 350 based on Foata normal form. 102/1865 useless extension candidates. Maximal degree in co-relation 3892. Up to 1196 conditions per place. [2023-08-30 16:38:21,173 INFO L137 encePairwiseOnDemand]: 136/145 looper letters, 57 selfloop transitions, 15 changer transitions 0/90 dead transitions. [2023-08-30 16:38:21,173 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 90 transitions, 512 flow [2023-08-30 16:38:21,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 16:38:21,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 16:38:21,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 379 transitions. [2023-08-30 16:38:21,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227586206896552 [2023-08-30 16:38:21,175 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 379 transitions. [2023-08-30 16:38:21,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 379 transitions. [2023-08-30 16:38:21,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:38:21,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 379 transitions. [2023-08-30 16:38:21,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 75.8) internal successors, (379), 5 states have internal predecessors, (379), 0 states have call successors, (0), 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 16:38:21,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 145.0) internal successors, (870), 6 states have internal predecessors, (870), 0 states have call successors, (0), 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 16:38:21,177 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 145.0) internal successors, (870), 6 states have internal predecessors, (870), 0 states have call successors, (0), 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 16:38:21,177 INFO L175 Difference]: Start difference. First operand has 53 places, 62 transitions, 276 flow. Second operand 5 states and 379 transitions. [2023-08-30 16:38:21,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 90 transitions, 512 flow [2023-08-30 16:38:21,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 90 transitions, 481 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 16:38:21,197 INFO L231 Difference]: Finished difference. Result has 55 places, 67 transitions, 317 flow [2023-08-30 16:38:21,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=317, PETRI_PLACES=55, PETRI_TRANSITIONS=67} [2023-08-30 16:38:21,198 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2023-08-30 16:38:21,198 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 67 transitions, 317 flow [2023-08-30 16:38:21,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 65.2) internal successors, (326), 5 states have internal predecessors, (326), 0 states have call successors, (0), 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 16:38:21,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:21,199 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:38:21,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 16:38:21,199 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:38:21,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:21,200 INFO L85 PathProgramCache]: Analyzing trace with hash -639441064, now seen corresponding path program 2 times [2023-08-30 16:38:21,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:21,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459798803] [2023-08-30 16:38:21,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:21,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:21,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:21,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:38:21,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:21,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459798803] [2023-08-30 16:38:21,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459798803] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:38:21,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027282987] [2023-08-30 16:38:21,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 16:38:21,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:38:21,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:38:21,544 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:38:21,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 16:38:21,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 16:38:21,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:38:21,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-30 16:38:21,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:38:21,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 16:38:21,769 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-30 16:38:21,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-30 16:38:21,845 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 16:38:21,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 16:38:21,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 16:38:21,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 16:38:21,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:38:21,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:38:22,004 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_117 (Array Int Int))) (not (= (mod c_~s~0 4294967296) (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t~1#1.base| v_ArrVal_117) |c_thr1Thread2of2ForFork0_~#l~0#1.base|) |c_thr1Thread2of2ForFork0_~#l~0#1.offset|) 4294967296)))) is different from false [2023-08-30 16:38:22,022 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:38:22,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2023-08-30 16:38:22,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2023-08-30 16:38:22,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-30 16:38:22,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2023-08-30 16:38:22,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027282987] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:38:22,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:38:22,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 8] total 19 [2023-08-30 16:38:22,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190519868] [2023-08-30 16:38:22,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:38:22,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 16:38:22,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:38:22,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 16:38:22,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=286, Unknown=1, NotChecked=34, Total=380 [2023-08-30 16:38:22,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 145 [2023-08-30 16:38:22,342 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 67 transitions, 317 flow. Second operand has 20 states, 20 states have (on average 35.95) internal successors, (719), 20 states have internal predecessors, (719), 0 states have call successors, (0), 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 16:38:22,342 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:38:22,342 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 145 [2023-08-30 16:38:22,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:38:25,919 INFO L130 PetriNetUnfolder]: 3870/6031 cut-off events. [2023-08-30 16:38:25,919 INFO L131 PetriNetUnfolder]: For 5004/5004 co-relation queries the response was YES. [2023-08-30 16:38:25,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17299 conditions, 6031 events. 3870/6031 cut-off events. For 5004/5004 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 33498 event pairs, 594 based on Foata normal form. 418/6449 useless extension candidates. Maximal degree in co-relation 16738. Up to 2095 conditions per place. [2023-08-30 16:38:25,941 INFO L137 encePairwiseOnDemand]: 115/145 looper letters, 241 selfloop transitions, 258 changer transitions 63/565 dead transitions. [2023-08-30 16:38:25,941 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 565 transitions, 3488 flow [2023-08-30 16:38:25,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-30 16:38:25,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-30 16:38:25,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 1912 transitions. [2023-08-30 16:38:25,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3296551724137931 [2023-08-30 16:38:25,948 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 1912 transitions. [2023-08-30 16:38:25,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 1912 transitions. [2023-08-30 16:38:25,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:38:25,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 1912 transitions. [2023-08-30 16:38:25,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 47.8) internal successors, (1912), 40 states have internal predecessors, (1912), 0 states have call successors, (0), 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 16:38:25,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 145.0) internal successors, (5945), 41 states have internal predecessors, (5945), 0 states have call successors, (0), 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 16:38:25,959 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 145.0) internal successors, (5945), 41 states have internal predecessors, (5945), 0 states have call successors, (0), 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 16:38:25,959 INFO L175 Difference]: Start difference. First operand has 55 places, 67 transitions, 317 flow. Second operand 40 states and 1912 transitions. [2023-08-30 16:38:25,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 565 transitions, 3488 flow [2023-08-30 16:38:25,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 565 transitions, 3339 flow, removed 22 selfloop flow, removed 3 redundant places. [2023-08-30 16:38:25,975 INFO L231 Difference]: Finished difference. Result has 120 places, 327 transitions, 2563 flow [2023-08-30 16:38:25,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=2563, PETRI_PLACES=120, PETRI_TRANSITIONS=327} [2023-08-30 16:38:25,977 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2023-08-30 16:38:25,977 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 327 transitions, 2563 flow [2023-08-30 16:38:25,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 35.95) internal successors, (719), 20 states have internal predecessors, (719), 0 states have call successors, (0), 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 16:38:25,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:25,978 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:38:25,994 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 16:38:26,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:38:26,183 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:38:26,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:26,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1995019904, now seen corresponding path program 3 times [2023-08-30 16:38:26,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:26,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293669752] [2023-08-30 16:38:26,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:26,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:26,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:26,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:38:26,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:26,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293669752] [2023-08-30 16:38:26,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293669752] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:38:26,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880482731] [2023-08-30 16:38:26,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 16:38:26,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:38:26,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:38:26,481 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:38:26,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 16:38:26,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 16:38:26,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:38:26,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 16:38:26,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:38:26,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 16:38:26,611 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-30 16:38:26,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 16:38:26,673 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 16:38:26,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 16:38:26,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 16:38:26,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-08-30 16:38:26,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:38:26,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:38:26,846 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:38:26,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2023-08-30 16:38:26,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2023-08-30 16:38:26,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-30 16:38:27,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:38:27,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880482731] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:38:27,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:38:27,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 18 [2023-08-30 16:38:27,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898092640] [2023-08-30 16:38:27,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:38:27,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 16:38:27,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:38:27,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 16:38:27,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=277, Unknown=4, NotChecked=0, Total=342 [2023-08-30 16:38:27,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 145 [2023-08-30 16:38:27,396 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 327 transitions, 2563 flow. Second operand has 19 states, 19 states have (on average 36.05263157894737) internal successors, (685), 19 states have internal predecessors, (685), 0 states have call successors, (0), 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 16:38:27,396 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:38:27,396 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 145 [2023-08-30 16:38:27,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:38:30,939 INFO L130 PetriNetUnfolder]: 4213/6696 cut-off events. [2023-08-30 16:38:30,940 INFO L131 PetriNetUnfolder]: For 77653/77653 co-relation queries the response was YES. [2023-08-30 16:38:30,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37405 conditions, 6696 events. 4213/6696 cut-off events. For 77653/77653 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 38538 event pairs, 227 based on Foata normal form. 97/6789 useless extension candidates. Maximal degree in co-relation 36172. Up to 1881 conditions per place. [2023-08-30 16:38:30,976 INFO L137 encePairwiseOnDemand]: 120/145 looper letters, 313 selfloop transitions, 355 changer transitions 184/855 dead transitions. [2023-08-30 16:38:30,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 855 transitions, 9311 flow [2023-08-30 16:38:30,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-30 16:38:30,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-30 16:38:30,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2071 transitions. [2023-08-30 16:38:30,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32460815047021946 [2023-08-30 16:38:30,993 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2071 transitions. [2023-08-30 16:38:30,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2071 transitions. [2023-08-30 16:38:30,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:38:30,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2071 transitions. [2023-08-30 16:38:30,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 47.06818181818182) internal successors, (2071), 44 states have internal predecessors, (2071), 0 states have call successors, (0), 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 16:38:31,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 145.0) internal successors, (6525), 45 states have internal predecessors, (6525), 0 states have call successors, (0), 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 16:38:31,003 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 145.0) internal successors, (6525), 45 states have internal predecessors, (6525), 0 states have call successors, (0), 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 16:38:31,003 INFO L175 Difference]: Start difference. First operand has 120 places, 327 transitions, 2563 flow. Second operand 44 states and 2071 transitions. [2023-08-30 16:38:31,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 855 transitions, 9311 flow [2023-08-30 16:38:31,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 855 transitions, 8902 flow, removed 179 selfloop flow, removed 4 redundant places. [2023-08-30 16:38:31,116 INFO L231 Difference]: Finished difference. Result has 182 places, 474 transitions, 4848 flow [2023-08-30 16:38:31,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=2347, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=4848, PETRI_PLACES=182, PETRI_TRANSITIONS=474} [2023-08-30 16:38:31,117 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2023-08-30 16:38:31,117 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 474 transitions, 4848 flow [2023-08-30 16:38:31,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 36.05263157894737) internal successors, (685), 19 states have internal predecessors, (685), 0 states have call successors, (0), 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 16:38:31,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:31,118 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:38:31,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 16:38:31,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-30 16:38:31,323 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:38:31,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:31,323 INFO L85 PathProgramCache]: Analyzing trace with hash 18394886, now seen corresponding path program 4 times [2023-08-30 16:38:31,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:31,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096055709] [2023-08-30 16:38:31,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:31,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:31,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:31,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:38:31,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:31,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096055709] [2023-08-30 16:38:31,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096055709] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:38:31,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444067093] [2023-08-30 16:38:31,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 16:38:31,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:38:31,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:38:31,475 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:38:31,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 16:38:31,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 16:38:31,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:38:31,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 16:38:31,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:38:31,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 16:38:31,585 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 16:38:31,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 16:38:31,702 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-08-30 16:38:31,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 28 [2023-08-30 16:38:31,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 16:38:31,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:38:31,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:38:31,775 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_190 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t~1#1.base| v_ArrVal_190) |c_thr1Thread1of2ForFork0_~#l~0#1.base|) |c_thr1Thread1of2ForFork0_~#l~0#1.offset|) 4294967296) (mod c_~s~0 4294967296)))) is different from false [2023-08-30 16:38:31,788 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_190 (Array Int Int))) (not (= (mod c_~s~0 4294967296) (mod (select (select (store (store |c_#memory_int| |c_thr1Thread1of2ForFork0_~#l~0#1.base| (store (select |c_#memory_int| |c_thr1Thread1of2ForFork0_~#l~0#1.base|) |c_thr1Thread1of2ForFork0_~#l~0#1.offset| c_~t~0)) |c_ULTIMATE.start_main_~#t~1#1.base| v_ArrVal_190) |c_thr1Thread1of2ForFork0_~#l~0#1.base|) |c_thr1Thread1of2ForFork0_~#l~0#1.offset|) 4294967296)))) is different from false [2023-08-30 16:38:31,807 INFO L321 Elim1Store]: treesize reduction 15, result has 64.3 percent of original size [2023-08-30 16:38:31,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 50 [2023-08-30 16:38:31,815 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:38:31,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 64 [2023-08-30 16:38:31,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-30 16:38:31,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2023-08-30 16:38:31,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444067093] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:38:31,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:38:31,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 9] total 19 [2023-08-30 16:38:31,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706956963] [2023-08-30 16:38:31,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:38:31,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 16:38:31,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:38:31,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 16:38:31,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=253, Unknown=2, NotChecked=66, Total=380 [2023-08-30 16:38:31,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 145 [2023-08-30 16:38:31,938 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 474 transitions, 4848 flow. Second operand has 20 states, 20 states have (on average 36.9) internal successors, (738), 20 states have internal predecessors, (738), 0 states have call successors, (0), 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 16:38:31,938 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:38:31,938 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 145 [2023-08-30 16:38:31,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:38:35,455 INFO L130 PetriNetUnfolder]: 7350/11596 cut-off events. [2023-08-30 16:38:35,456 INFO L131 PetriNetUnfolder]: For 203934/203934 co-relation queries the response was YES. [2023-08-30 16:38:35,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78945 conditions, 11596 events. 7350/11596 cut-off events. For 203934/203934 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 73223 event pairs, 419 based on Foata normal form. 416/11968 useless extension candidates. Maximal degree in co-relation 78223. Up to 3586 conditions per place. [2023-08-30 16:38:35,577 INFO L137 encePairwiseOnDemand]: 119/145 looper letters, 590 selfloop transitions, 705 changer transitions 191/1489 dead transitions. [2023-08-30 16:38:35,578 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 1489 transitions, 19054 flow [2023-08-30 16:38:35,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-30 16:38:35,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-30 16:38:35,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1713 transitions. [2023-08-30 16:38:35,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34746450304259635 [2023-08-30 16:38:35,582 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1713 transitions. [2023-08-30 16:38:35,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1713 transitions. [2023-08-30 16:38:35,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:38:35,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1713 transitions. [2023-08-30 16:38:35,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 50.38235294117647) internal successors, (1713), 34 states have internal predecessors, (1713), 0 states have call successors, (0), 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 16:38:35,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 145.0) internal successors, (5075), 35 states have internal predecessors, (5075), 0 states have call successors, (0), 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 16:38:35,611 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 145.0) internal successors, (5075), 35 states have internal predecessors, (5075), 0 states have call successors, (0), 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 16:38:35,611 INFO L175 Difference]: Start difference. First operand has 182 places, 474 transitions, 4848 flow. Second operand 34 states and 1713 transitions. [2023-08-30 16:38:35,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 1489 transitions, 19054 flow [2023-08-30 16:38:36,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 1489 transitions, 17391 flow, removed 579 selfloop flow, removed 17 redundant places. [2023-08-30 16:38:36,769 INFO L231 Difference]: Finished difference. Result has 219 places, 951 transitions, 12432 flow [2023-08-30 16:38:36,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=4350, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=12432, PETRI_PLACES=219, PETRI_TRANSITIONS=951} [2023-08-30 16:38:36,770 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2023-08-30 16:38:36,770 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 951 transitions, 12432 flow [2023-08-30 16:38:36,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 36.9) internal successors, (738), 20 states have internal predecessors, (738), 0 states have call successors, (0), 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 16:38:36,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:36,771 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:38:36,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 16:38:36,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:38:36,976 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:38:36,977 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:36,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1976963605, now seen corresponding path program 1 times [2023-08-30 16:38:36,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:36,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606380967] [2023-08-30 16:38:36,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:36,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:37,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:38:37,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:37,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606380967] [2023-08-30 16:38:37,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606380967] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:38:37,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452260971] [2023-08-30 16:38:37,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:37,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:38:37,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:38:37,301 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:38:37,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 16:38:37,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:37,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 16:38:37,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:38:37,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 16:38:37,425 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-30 16:38:37,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-30 16:38:37,473 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 16:38:37,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 16:38:37,526 INFO L321 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2023-08-30 16:38:37,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 32 [2023-08-30 16:38:37,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-08-30 16:38:37,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:38:37,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:38:37,666 WARN L839 $PredicateComparison]: unable to prove that (or (= 4294967295 (mod c_~t~0 4294967296)) (forall ((v_ArrVal_227 (Array Int Int))) (not (= (mod c_~s~0 4294967296) (mod (select (select (store (store |c_#memory_int| |c_thr1Thread1of2ForFork0_~#l~0#1.base| (store (select |c_#memory_int| |c_thr1Thread1of2ForFork0_~#l~0#1.base|) |c_thr1Thread1of2ForFork0_~#l~0#1.offset| c_~t~0)) |c_ULTIMATE.start_main_~#t~1#1.base| v_ArrVal_227) |c_thr1Thread1of2ForFork0_~#l~0#1.base|) |c_thr1Thread1of2ForFork0_~#l~0#1.offset|) 4294967296))))) is different from false [2023-08-30 16:38:37,710 INFO L321 Elim1Store]: treesize reduction 15, result has 64.3 percent of original size [2023-08-30 16:38:37,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 50 [2023-08-30 16:38:37,721 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:38:37,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 64 [2023-08-30 16:38:37,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2023-08-30 16:38:37,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:38:37,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452260971] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:38:37,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:38:37,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 20 [2023-08-30 16:38:37,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494955008] [2023-08-30 16:38:37,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:38:37,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 16:38:37,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:38:37,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 16:38:37,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=312, Unknown=5, NotChecked=36, Total=420 [2023-08-30 16:38:37,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 145 [2023-08-30 16:38:37,973 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 951 transitions, 12432 flow. Second operand has 21 states, 21 states have (on average 35.714285714285715) internal successors, (750), 21 states have internal predecessors, (750), 0 states have call successors, (0), 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 16:38:37,973 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:38:37,973 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 145 [2023-08-30 16:38:37,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:38:41,490 WARN L839 $PredicateComparison]: unable to prove that (and (not (= (mod c_~c~0 4294967296) 1)) (forall ((v_ArrVal_227 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t~1#1.base| v_ArrVal_227) |c_thr1Thread1of2ForFork0_~#l~0#1.base|) |c_thr1Thread1of2ForFork0_~#l~0#1.offset|) 4294967296) (mod c_~s~0 4294967296))))) is different from false [2023-08-30 16:38:43,728 INFO L130 PetriNetUnfolder]: 7986/12600 cut-off events. [2023-08-30 16:38:43,728 INFO L131 PetriNetUnfolder]: For 338684/338693 co-relation queries the response was YES. [2023-08-30 16:38:43,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107799 conditions, 12600 events. 7986/12600 cut-off events. For 338684/338693 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 80345 event pairs, 432 based on Foata normal form. 83/12662 useless extension candidates. Maximal degree in co-relation 107243. Up to 4476 conditions per place. [2023-08-30 16:38:43,814 INFO L137 encePairwiseOnDemand]: 116/145 looper letters, 521 selfloop transitions, 904 changer transitions 189/1616 dead transitions. [2023-08-30 16:38:43,814 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 1616 transitions, 25527 flow [2023-08-30 16:38:43,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-08-30 16:38:43,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-08-30 16:38:43,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2254 transitions. [2023-08-30 16:38:43,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31089655172413794 [2023-08-30 16:38:43,818 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2254 transitions. [2023-08-30 16:38:43,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2254 transitions. [2023-08-30 16:38:43,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:38:43,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2254 transitions. [2023-08-30 16:38:43,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 45.08) internal successors, (2254), 50 states have internal predecessors, (2254), 0 states have call successors, (0), 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 16:38:43,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 145.0) internal successors, (7395), 51 states have internal predecessors, (7395), 0 states have call successors, (0), 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 16:38:43,827 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 145.0) internal successors, (7395), 51 states have internal predecessors, (7395), 0 states have call successors, (0), 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 16:38:43,827 INFO L175 Difference]: Start difference. First operand has 219 places, 951 transitions, 12432 flow. Second operand 50 states and 2254 transitions. [2023-08-30 16:38:43,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 1616 transitions, 25527 flow [2023-08-30 16:38:45,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 1616 transitions, 25113 flow, removed 200 selfloop flow, removed 4 redundant places. [2023-08-30 16:38:45,563 INFO L231 Difference]: Finished difference. Result has 294 places, 1227 transitions, 19726 flow [2023-08-30 16:38:45,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=12114, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=948, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=635, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=19726, PETRI_PLACES=294, PETRI_TRANSITIONS=1227} [2023-08-30 16:38:45,564 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2023-08-30 16:38:45,564 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 1227 transitions, 19726 flow [2023-08-30 16:38:45,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 35.714285714285715) internal successors, (750), 21 states have internal predecessors, (750), 0 states have call successors, (0), 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 16:38:45,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:45,565 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:38:45,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 16:38:45,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:38:45,770 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:38:45,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:45,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1539344510, now seen corresponding path program 1 times [2023-08-30 16:38:45,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:45,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904760072] [2023-08-30 16:38:45,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:45,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:45,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:45,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 16:38:45,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:45,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904760072] [2023-08-30 16:38:45,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904760072] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:38:45,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:38:45,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 16:38:45,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727562863] [2023-08-30 16:38:45,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:38:45,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 16:38:45,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:38:45,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 16:38:45,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 16:38:46,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 145 [2023-08-30 16:38:46,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 1227 transitions, 19726 flow. Second operand has 8 states, 8 states have (on average 58.625) internal successors, (469), 8 states have internal predecessors, (469), 0 states have call successors, (0), 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 16:38:46,013 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:38:46,013 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 145 [2023-08-30 16:38:46,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:38:48,836 INFO L130 PetriNetUnfolder]: 6415/10637 cut-off events. [2023-08-30 16:38:48,836 INFO L131 PetriNetUnfolder]: For 465357/466199 co-relation queries the response was YES. [2023-08-30 16:38:48,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109722 conditions, 10637 events. 6415/10637 cut-off events. For 465357/466199 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 72051 event pairs, 658 based on Foata normal form. 17/10416 useless extension candidates. Maximal degree in co-relation 109260. Up to 7267 conditions per place. [2023-08-30 16:38:48,937 INFO L137 encePairwiseOnDemand]: 135/145 looper letters, 729 selfloop transitions, 149 changer transitions 0/1274 dead transitions. [2023-08-30 16:38:48,937 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 1274 transitions, 22596 flow [2023-08-30 16:38:48,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 16:38:48,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 16:38:48,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 548 transitions. [2023-08-30 16:38:48,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4724137931034483 [2023-08-30 16:38:48,939 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 548 transitions. [2023-08-30 16:38:48,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 548 transitions. [2023-08-30 16:38:48,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:38:48,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 548 transitions. [2023-08-30 16:38:48,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 68.5) internal successors, (548), 8 states have internal predecessors, (548), 0 states have call successors, (0), 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 16:38:48,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 145.0) internal successors, (1305), 9 states have internal predecessors, (1305), 0 states have call successors, (0), 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 16:38:48,941 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 145.0) internal successors, (1305), 9 states have internal predecessors, (1305), 0 states have call successors, (0), 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 16:38:48,941 INFO L175 Difference]: Start difference. First operand has 294 places, 1227 transitions, 19726 flow. Second operand 8 states and 548 transitions. [2023-08-30 16:38:48,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 1274 transitions, 22596 flow [2023-08-30 16:38:51,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 1274 transitions, 21507 flow, removed 335 selfloop flow, removed 17 redundant places. [2023-08-30 16:38:51,888 INFO L231 Difference]: Finished difference. Result has 281 places, 1227 transitions, 19018 flow [2023-08-30 16:38:51,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=18598, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1073, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=19018, PETRI_PLACES=281, PETRI_TRANSITIONS=1227} [2023-08-30 16:38:51,889 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2023-08-30 16:38:51,889 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 1227 transitions, 19018 flow [2023-08-30 16:38:51,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 58.625) internal successors, (469), 8 states have internal predecessors, (469), 0 states have call successors, (0), 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 16:38:51,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:51,889 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:38:51,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 16:38:51,889 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:38:51,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:51,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1480178390, now seen corresponding path program 2 times [2023-08-30 16:38:51,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:51,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206203532] [2023-08-30 16:38:51,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:51,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:51,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:52,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 16:38:52,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:52,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206203532] [2023-08-30 16:38:52,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206203532] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:38:52,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:38:52,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 16:38:52,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568717652] [2023-08-30 16:38:52,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:38:52,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 16:38:52,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:38:52,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 16:38:52,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 16:38:52,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 145 [2023-08-30 16:38:52,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 1227 transitions, 19018 flow. Second operand has 8 states, 8 states have (on average 58.625) internal successors, (469), 8 states have internal predecessors, (469), 0 states have call successors, (0), 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 16:38:52,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:38:52,133 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 145 [2023-08-30 16:38:52,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:38:54,929 INFO L130 PetriNetUnfolder]: 6489/10750 cut-off events. [2023-08-30 16:38:54,930 INFO L131 PetriNetUnfolder]: For 413548/414364 co-relation queries the response was YES. [2023-08-30 16:38:55,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106785 conditions, 10750 events. 6489/10750 cut-off events. For 413548/414364 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 72799 event pairs, 659 based on Foata normal form. 19/10528 useless extension candidates. Maximal degree in co-relation 106334. Up to 7349 conditions per place. [2023-08-30 16:38:55,114 INFO L137 encePairwiseOnDemand]: 135/145 looper letters, 735 selfloop transitions, 160 changer transitions 0/1291 dead transitions. [2023-08-30 16:38:55,115 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 1291 transitions, 22143 flow [2023-08-30 16:38:55,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 16:38:55,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 16:38:55,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 542 transitions. [2023-08-30 16:38:55,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4672413793103448 [2023-08-30 16:38:55,116 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 542 transitions. [2023-08-30 16:38:55,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 542 transitions. [2023-08-30 16:38:55,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:38:55,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 542 transitions. [2023-08-30 16:38:55,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 67.75) internal successors, (542), 8 states have internal predecessors, (542), 0 states have call successors, (0), 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 16:38:55,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 145.0) internal successors, (1305), 9 states have internal predecessors, (1305), 0 states have call successors, (0), 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 16:38:55,118 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 145.0) internal successors, (1305), 9 states have internal predecessors, (1305), 0 states have call successors, (0), 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 16:38:55,119 INFO L175 Difference]: Start difference. First operand has 281 places, 1227 transitions, 19018 flow. Second operand 8 states and 542 transitions. [2023-08-30 16:38:55,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 1291 transitions, 22143 flow [2023-08-30 16:38:57,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 1291 transitions, 21876 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 16:38:57,699 INFO L231 Difference]: Finished difference. Result has 285 places, 1243 transitions, 19477 flow [2023-08-30 16:38:57,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=18765, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1074, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=19477, PETRI_PLACES=285, PETRI_TRANSITIONS=1243} [2023-08-30 16:38:57,700 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2023-08-30 16:38:57,700 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 1243 transitions, 19477 flow [2023-08-30 16:38:57,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 58.625) internal successors, (469), 8 states have internal predecessors, (469), 0 states have call successors, (0), 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 16:38:57,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:38:57,701 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:38:57,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 16:38:57,701 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:38:57,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:38:57,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1826673774, now seen corresponding path program 3 times [2023-08-30 16:38:57,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:38:57,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674210280] [2023-08-30 16:38:57,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:38:57,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:38:57,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:38:57,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 16:38:57,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:38:57,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674210280] [2023-08-30 16:38:57,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674210280] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:38:57,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:38:57,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 16:38:57,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161197112] [2023-08-30 16:38:57,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:38:57,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 16:38:57,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:38:57,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 16:38:57,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 16:38:57,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 145 [2023-08-30 16:38:57,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 1243 transitions, 19477 flow. Second operand has 8 states, 8 states have (on average 58.625) internal successors, (469), 8 states have internal predecessors, (469), 0 states have call successors, (0), 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 16:38:57,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:38:57,920 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 145 [2023-08-30 16:38:57,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:39:00,778 INFO L130 PetriNetUnfolder]: 6452/10686 cut-off events. [2023-08-30 16:39:00,778 INFO L131 PetriNetUnfolder]: For 419720/420540 co-relation queries the response was YES. [2023-08-30 16:39:00,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106798 conditions, 10686 events. 6452/10686 cut-off events. For 419720/420540 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 72282 event pairs, 646 based on Foata normal form. 19/10467 useless extension candidates. Maximal degree in co-relation 106344. Up to 7312 conditions per place. [2023-08-30 16:39:00,913 INFO L137 encePairwiseOnDemand]: 135/145 looper letters, 736 selfloop transitions, 156 changer transitions 3/1289 dead transitions. [2023-08-30 16:39:00,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 1289 transitions, 22289 flow [2023-08-30 16:39:00,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 16:39:00,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 16:39:00,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 542 transitions. [2023-08-30 16:39:00,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4672413793103448 [2023-08-30 16:39:00,915 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 542 transitions. [2023-08-30 16:39:00,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 542 transitions. [2023-08-30 16:39:00,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:39:00,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 542 transitions. [2023-08-30 16:39:00,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 67.75) internal successors, (542), 8 states have internal predecessors, (542), 0 states have call successors, (0), 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 16:39:00,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 145.0) internal successors, (1305), 9 states have internal predecessors, (1305), 0 states have call successors, (0), 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 16:39:00,918 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 145.0) internal successors, (1305), 9 states have internal predecessors, (1305), 0 states have call successors, (0), 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 16:39:00,918 INFO L175 Difference]: Start difference. First operand has 285 places, 1243 transitions, 19477 flow. Second operand 8 states and 542 transitions. [2023-08-30 16:39:00,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 1289 transitions, 22289 flow [2023-08-30 16:39:03,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 1289 transitions, 22079 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-30 16:39:03,624 INFO L231 Difference]: Finished difference. Result has 290 places, 1237 transitions, 19490 flow [2023-08-30 16:39:03,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=19165, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1081, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=19490, PETRI_PLACES=290, PETRI_TRANSITIONS=1237} [2023-08-30 16:39:03,626 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2023-08-30 16:39:03,626 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 1237 transitions, 19490 flow [2023-08-30 16:39:03,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 58.625) internal successors, (469), 8 states have internal predecessors, (469), 0 states have call successors, (0), 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 16:39:03,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:39:03,626 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:39:03,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 16:39:03,627 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:39:03,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:39:03,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1907505694, now seen corresponding path program 4 times [2023-08-30 16:39:03,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:39:03,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277643412] [2023-08-30 16:39:03,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:39:03,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:39:03,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:39:03,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 16:39:03,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:39:03,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277643412] [2023-08-30 16:39:03,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277643412] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:39:03,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:39:03,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 16:39:03,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828545787] [2023-08-30 16:39:03,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:39:03,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 16:39:03,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:39:03,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 16:39:03,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-30 16:39:03,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 145 [2023-08-30 16:39:03,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 1237 transitions, 19490 flow. Second operand has 6 states, 6 states have (on average 65.16666666666667) internal successors, (391), 6 states have internal predecessors, (391), 0 states have call successors, (0), 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 16:39:03,820 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:39:03,820 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 145 [2023-08-30 16:39:03,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:39:06,593 INFO L130 PetriNetUnfolder]: 6805/11211 cut-off events. [2023-08-30 16:39:06,593 INFO L131 PetriNetUnfolder]: For 463716/464644 co-relation queries the response was YES. [2023-08-30 16:39:06,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114220 conditions, 11211 events. 6805/11211 cut-off events. For 463716/464644 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 75888 event pairs, 686 based on Foata normal form. 46/10988 useless extension candidates. Maximal degree in co-relation 113764. Up to 6494 conditions per place. [2023-08-30 16:39:06,851 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 614 selfloop transitions, 296 changer transitions 0/1300 dead transitions. [2023-08-30 16:39:06,851 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 1300 transitions, 22644 flow [2023-08-30 16:39:06,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 16:39:06,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 16:39:06,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 454 transitions. [2023-08-30 16:39:06,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5218390804597701 [2023-08-30 16:39:06,853 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 454 transitions. [2023-08-30 16:39:06,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 454 transitions. [2023-08-30 16:39:06,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:39:06,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 454 transitions. [2023-08-30 16:39:06,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 75.66666666666667) internal successors, (454), 6 states have internal predecessors, (454), 0 states have call successors, (0), 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 16:39:06,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 145.0) internal successors, (1015), 7 states have internal predecessors, (1015), 0 states have call successors, (0), 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 16:39:06,855 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 145.0) internal successors, (1015), 7 states have internal predecessors, (1015), 0 states have call successors, (0), 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 16:39:06,856 INFO L175 Difference]: Start difference. First operand has 290 places, 1237 transitions, 19490 flow. Second operand 6 states and 454 transitions. [2023-08-30 16:39:06,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 1300 transitions, 22644 flow [2023-08-30 16:39:09,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 1300 transitions, 22405 flow, removed 10 selfloop flow, removed 5 redundant places. [2023-08-30 16:39:09,808 INFO L231 Difference]: Finished difference. Result has 291 places, 1261 transitions, 20468 flow [2023-08-30 16:39:09,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=19077, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=931, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=20468, PETRI_PLACES=291, PETRI_TRANSITIONS=1261} [2023-08-30 16:39:09,809 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2023-08-30 16:39:09,809 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 1261 transitions, 20468 flow [2023-08-30 16:39:09,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 65.16666666666667) internal successors, (391), 6 states have internal predecessors, (391), 0 states have call successors, (0), 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 16:39:09,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:39:09,809 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:39:09,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 16:39:09,810 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:39:09,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:39:09,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1602221196, now seen corresponding path program 5 times [2023-08-30 16:39:09,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:39:09,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498360222] [2023-08-30 16:39:09,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:39:09,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:39:09,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:39:09,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 16:39:09,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:39:09,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498360222] [2023-08-30 16:39:09,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498360222] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:39:09,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:39:09,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 16:39:09,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431971877] [2023-08-30 16:39:09,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:39:09,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 16:39:09,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:39:09,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 16:39:09,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 16:39:10,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2023-08-30 16:39:10,048 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 1261 transitions, 20468 flow. Second operand has 8 states, 8 states have (on average 57.625) internal successors, (461), 8 states have internal predecessors, (461), 0 states have call successors, (0), 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 16:39:10,048 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:39:10,048 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2023-08-30 16:39:10,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:39:13,001 INFO L130 PetriNetUnfolder]: 6980/11483 cut-off events. [2023-08-30 16:39:13,001 INFO L131 PetriNetUnfolder]: For 476856/477936 co-relation queries the response was YES. [2023-08-30 16:39:13,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117762 conditions, 11483 events. 6980/11483 cut-off events. For 476856/477936 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 77982 event pairs, 775 based on Foata normal form. 25/11224 useless extension candidates. Maximal degree in co-relation 117288. Up to 8332 conditions per place. [2023-08-30 16:39:13,139 INFO L137 encePairwiseOnDemand]: 135/145 looper letters, 872 selfloop transitions, 119 changer transitions 6/1387 dead transitions. [2023-08-30 16:39:13,139 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 1387 transitions, 24777 flow [2023-08-30 16:39:13,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 16:39:13,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 16:39:13,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 462 transitions. [2023-08-30 16:39:13,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45517241379310347 [2023-08-30 16:39:13,157 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 462 transitions. [2023-08-30 16:39:13,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 462 transitions. [2023-08-30 16:39:13,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:39:13,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 462 transitions. [2023-08-30 16:39:13,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 66.0) internal successors, (462), 7 states have internal predecessors, (462), 0 states have call successors, (0), 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 16:39:13,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 145.0) internal successors, (1160), 8 states have internal predecessors, (1160), 0 states have call successors, (0), 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 16:39:13,159 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 145.0) internal successors, (1160), 8 states have internal predecessors, (1160), 0 states have call successors, (0), 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 16:39:13,159 INFO L175 Difference]: Start difference. First operand has 291 places, 1261 transitions, 20468 flow. Second operand 7 states and 462 transitions. [2023-08-30 16:39:13,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 1387 transitions, 24777 flow [2023-08-30 16:39:15,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 1387 transitions, 24057 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-08-30 16:39:15,904 INFO L231 Difference]: Finished difference. Result has 295 places, 1335 transitions, 21631 flow [2023-08-30 16:39:15,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=19897, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=21631, PETRI_PLACES=295, PETRI_TRANSITIONS=1335} [2023-08-30 16:39:15,905 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2023-08-30 16:39:15,905 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 1335 transitions, 21631 flow [2023-08-30 16:39:15,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 57.625) internal successors, (461), 8 states have internal predecessors, (461), 0 states have call successors, (0), 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 16:39:15,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:39:15,905 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:39:15,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 16:39:15,906 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:39:15,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:39:15,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1632500922, now seen corresponding path program 6 times [2023-08-30 16:39:15,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:39:15,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387704084] [2023-08-30 16:39:15,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:39:15,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:39:15,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:39:15,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 16:39:15,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:39:15,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387704084] [2023-08-30 16:39:15,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387704084] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:39:15,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:39:15,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 16:39:15,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946640290] [2023-08-30 16:39:15,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:39:15,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 16:39:15,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:39:15,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 16:39:15,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-30 16:39:16,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 145 [2023-08-30 16:39:16,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 1335 transitions, 21631 flow. Second operand has 6 states, 6 states have (on average 64.16666666666667) internal successors, (385), 6 states have internal predecessors, (385), 0 states have call successors, (0), 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 16:39:16,019 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:39:16,019 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 145 [2023-08-30 16:39:16,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:39:18,596 INFO L130 PetriNetUnfolder]: 6367/10457 cut-off events. [2023-08-30 16:39:18,597 INFO L131 PetriNetUnfolder]: For 436185/436948 co-relation queries the response was YES. [2023-08-30 16:39:18,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107917 conditions, 10457 events. 6367/10457 cut-off events. For 436185/436948 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 69446 event pairs, 603 based on Foata normal form. 88/10297 useless extension candidates. Maximal degree in co-relation 107461. Up to 6471 conditions per place. [2023-08-30 16:39:18,699 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 642 selfloop transitions, 303 changer transitions 22/1353 dead transitions. [2023-08-30 16:39:18,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 1353 transitions, 24069 flow [2023-08-30 16:39:18,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 16:39:18,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 16:39:18,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 448 transitions. [2023-08-30 16:39:18,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5149425287356322 [2023-08-30 16:39:18,701 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 448 transitions. [2023-08-30 16:39:18,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 448 transitions. [2023-08-30 16:39:18,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:39:18,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 448 transitions. [2023-08-30 16:39:18,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 74.66666666666667) internal successors, (448), 6 states have internal predecessors, (448), 0 states have call successors, (0), 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 16:39:18,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 145.0) internal successors, (1015), 7 states have internal predecessors, (1015), 0 states have call successors, (0), 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 16:39:18,703 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 145.0) internal successors, (1015), 7 states have internal predecessors, (1015), 0 states have call successors, (0), 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 16:39:18,703 INFO L175 Difference]: Start difference. First operand has 295 places, 1335 transitions, 21631 flow. Second operand 6 states and 448 transitions. [2023-08-30 16:39:18,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 1353 transitions, 24069 flow [2023-08-30 16:39:21,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 1353 transitions, 23974 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 16:39:21,529 INFO L231 Difference]: Finished difference. Result has 300 places, 1293 transitions, 21402 flow [2023-08-30 16:39:21,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=21003, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1005, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=21402, PETRI_PLACES=300, PETRI_TRANSITIONS=1293} [2023-08-30 16:39:21,530 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2023-08-30 16:39:21,530 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 1293 transitions, 21402 flow [2023-08-30 16:39:21,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 64.16666666666667) internal successors, (385), 6 states have internal predecessors, (385), 0 states have call successors, (0), 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 16:39:21,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:39:21,531 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:39:21,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 16:39:21,531 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:39:21,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:39:21,532 INFO L85 PathProgramCache]: Analyzing trace with hash -302915170, now seen corresponding path program 7 times [2023-08-30 16:39:21,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:39:21,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611013858] [2023-08-30 16:39:21,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:39:21,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:39:21,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:39:21,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 16:39:21,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:39:21,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611013858] [2023-08-30 16:39:21,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611013858] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:39:21,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:39:21,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 16:39:21,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901804687] [2023-08-30 16:39:21,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:39:21,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 16:39:21,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:39:21,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 16:39:21,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-30 16:39:21,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 145 [2023-08-30 16:39:21,775 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 1293 transitions, 21402 flow. Second operand has 8 states, 8 states have (on average 58.625) internal successors, (469), 8 states have internal predecessors, (469), 0 states have call successors, (0), 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 16:39:21,775 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:39:21,775 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 145 [2023-08-30 16:39:21,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:39:24,571 INFO L130 PetriNetUnfolder]: 6121/10097 cut-off events. [2023-08-30 16:39:24,571 INFO L131 PetriNetUnfolder]: For 426636/427361 co-relation queries the response was YES. [2023-08-30 16:39:24,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105298 conditions, 10097 events. 6121/10097 cut-off events. For 426636/427361 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 67116 event pairs, 657 based on Foata normal form. 27/9891 useless extension candidates. Maximal degree in co-relation 104848. Up to 7347 conditions per place. [2023-08-30 16:39:24,687 INFO L137 encePairwiseOnDemand]: 135/145 looper letters, 834 selfloop transitions, 108 changer transitions 11/1339 dead transitions. [2023-08-30 16:39:24,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 1339 transitions, 24346 flow [2023-08-30 16:39:24,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 16:39:24,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 16:39:24,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 542 transitions. [2023-08-30 16:39:24,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4672413793103448 [2023-08-30 16:39:24,688 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 542 transitions. [2023-08-30 16:39:24,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 542 transitions. [2023-08-30 16:39:24,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:39:24,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 542 transitions. [2023-08-30 16:39:24,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 67.75) internal successors, (542), 8 states have internal predecessors, (542), 0 states have call successors, (0), 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 16:39:24,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 145.0) internal successors, (1305), 9 states have internal predecessors, (1305), 0 states have call successors, (0), 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 16:39:24,691 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 145.0) internal successors, (1305), 9 states have internal predecessors, (1305), 0 states have call successors, (0), 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 16:39:24,691 INFO L175 Difference]: Start difference. First operand has 300 places, 1293 transitions, 21402 flow. Second operand 8 states and 542 transitions. [2023-08-30 16:39:24,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 1339 transitions, 24346 flow [2023-08-30 16:39:27,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 1339 transitions, 23730 flow, removed 19 selfloop flow, removed 4 redundant places. [2023-08-30 16:39:27,446 INFO L231 Difference]: Finished difference. Result has 304 places, 1283 transitions, 20888 flow [2023-08-30 16:39:27,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=20675, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=20888, PETRI_PLACES=304, PETRI_TRANSITIONS=1283} [2023-08-30 16:39:27,447 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2023-08-30 16:39:27,447 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 1283 transitions, 20888 flow [2023-08-30 16:39:27,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 58.625) internal successors, (469), 8 states have internal predecessors, (469), 0 states have call successors, (0), 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 16:39:27,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:39:27,448 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:39:27,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 16:39:27,448 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:39:27,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:39:27,448 INFO L85 PathProgramCache]: Analyzing trace with hash -254319476, now seen corresponding path program 8 times [2023-08-30 16:39:27,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:39:27,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542395321] [2023-08-30 16:39:27,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:39:27,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:39:27,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:39:27,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 16:39:27,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:39:27,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542395321] [2023-08-30 16:39:27,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542395321] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:39:27,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:39:27,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 16:39:27,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474666168] [2023-08-30 16:39:27,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:39:27,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 16:39:27,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:39:27,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 16:39:27,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-30 16:39:27,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2023-08-30 16:39:27,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 1283 transitions, 20888 flow. Second operand has 8 states, 8 states have (on average 57.625) internal successors, (461), 8 states have internal predecessors, (461), 0 states have call successors, (0), 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 16:39:27,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:39:27,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2023-08-30 16:39:27,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:39:30,304 INFO L130 PetriNetUnfolder]: 6053/10025 cut-off events. [2023-08-30 16:39:30,304 INFO L131 PetriNetUnfolder]: For 417387/418116 co-relation queries the response was YES. [2023-08-30 16:39:30,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103447 conditions, 10025 events. 6053/10025 cut-off events. For 417387/418116 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 66882 event pairs, 611 based on Foata normal form. 19/9819 useless extension candidates. Maximal degree in co-relation 103011. Up to 7425 conditions per place. [2023-08-30 16:39:30,402 INFO L137 encePairwiseOnDemand]: 135/145 looper letters, 830 selfloop transitions, 117 changer transitions 13/1346 dead transitions. [2023-08-30 16:39:30,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 1346 transitions, 24018 flow [2023-08-30 16:39:30,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 16:39:30,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 16:39:30,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 528 transitions. [2023-08-30 16:39:30,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45517241379310347 [2023-08-30 16:39:30,407 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 528 transitions. [2023-08-30 16:39:30,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 528 transitions. [2023-08-30 16:39:30,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:39:30,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 528 transitions. [2023-08-30 16:39:30,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 66.0) internal successors, (528), 8 states have internal predecessors, (528), 0 states have call successors, (0), 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 16:39:30,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 145.0) internal successors, (1305), 9 states have internal predecessors, (1305), 0 states have call successors, (0), 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 16:39:30,418 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 145.0) internal successors, (1305), 9 states have internal predecessors, (1305), 0 states have call successors, (0), 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 16:39:30,418 INFO L175 Difference]: Start difference. First operand has 304 places, 1283 transitions, 20888 flow. Second operand 8 states and 528 transitions. [2023-08-30 16:39:30,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 1346 transitions, 24018 flow [2023-08-30 16:39:33,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 1346 transitions, 23862 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-08-30 16:39:33,069 INFO L231 Difference]: Finished difference. Result has 310 places, 1287 transitions, 21152 flow [2023-08-30 16:39:33,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=20739, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=21152, PETRI_PLACES=310, PETRI_TRANSITIONS=1287} [2023-08-30 16:39:33,070 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2023-08-30 16:39:33,070 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 1287 transitions, 21152 flow [2023-08-30 16:39:33,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 57.625) internal successors, (461), 8 states have internal predecessors, (461), 0 states have call successors, (0), 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 16:39:33,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:39:33,071 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:39:33,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-30 16:39:33,071 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:39:33,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:39:33,071 INFO L85 PathProgramCache]: Analyzing trace with hash -296060260, now seen corresponding path program 9 times [2023-08-30 16:39:33,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:39:33,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10694611] [2023-08-30 16:39:33,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:39:33,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:39:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:39:33,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:39:33,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:39:33,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10694611] [2023-08-30 16:39:33,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10694611] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:39:33,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:39:33,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 16:39:33,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269943935] [2023-08-30 16:39:33,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:39:33,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 16:39:33,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:39:33,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 16:39:33,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 16:39:33,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2023-08-30 16:39:33,276 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 1287 transitions, 21152 flow. Second operand has 8 states, 8 states have (on average 57.625) internal successors, (461), 8 states have internal predecessors, (461), 0 states have call successors, (0), 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 16:39:33,276 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:39:33,276 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2023-08-30 16:39:33,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:39:36,033 INFO L130 PetriNetUnfolder]: 6291/10361 cut-off events. [2023-08-30 16:39:36,033 INFO L131 PetriNetUnfolder]: For 435861/436618 co-relation queries the response was YES. [2023-08-30 16:39:36,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107967 conditions, 10361 events. 6291/10361 cut-off events. For 435861/436618 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 68763 event pairs, 710 based on Foata normal form. 29/10168 useless extension candidates. Maximal degree in co-relation 107528. Up to 7816 conditions per place. [2023-08-30 16:39:36,148 INFO L137 encePairwiseOnDemand]: 135/145 looper letters, 926 selfloop transitions, 78 changer transitions 11/1401 dead transitions. [2023-08-30 16:39:36,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 1401 transitions, 25505 flow [2023-08-30 16:39:36,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 16:39:36,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 16:39:36,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 459 transitions. [2023-08-30 16:39:36,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4522167487684729 [2023-08-30 16:39:36,160 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 459 transitions. [2023-08-30 16:39:36,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 459 transitions. [2023-08-30 16:39:36,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:39:36,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 459 transitions. [2023-08-30 16:39:36,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 65.57142857142857) internal successors, (459), 7 states have internal predecessors, (459), 0 states have call successors, (0), 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 16:39:36,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 145.0) internal successors, (1160), 8 states have internal predecessors, (1160), 0 states have call successors, (0), 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 16:39:36,176 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 145.0) internal successors, (1160), 8 states have internal predecessors, (1160), 0 states have call successors, (0), 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 16:39:36,176 INFO L175 Difference]: Start difference. First operand has 310 places, 1287 transitions, 21152 flow. Second operand 7 states and 459 transitions. [2023-08-30 16:39:36,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 1401 transitions, 25505 flow [2023-08-30 16:39:39,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 1401 transitions, 25230 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-30 16:39:39,022 INFO L231 Difference]: Finished difference. Result has 315 places, 1350 transitions, 22648 flow [2023-08-30 16:39:39,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=20971, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=22648, PETRI_PLACES=315, PETRI_TRANSITIONS=1350} [2023-08-30 16:39:39,023 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2023-08-30 16:39:39,023 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 1350 transitions, 22648 flow [2023-08-30 16:39:39,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 57.625) internal successors, (461), 8 states have internal predecessors, (461), 0 states have call successors, (0), 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 16:39:39,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:39:39,024 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:39:39,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-30 16:39:39,024 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:39:39,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:39:39,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1112852816, now seen corresponding path program 10 times [2023-08-30 16:39:39,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:39:39,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941163239] [2023-08-30 16:39:39,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:39:39,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:39:39,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:39:39,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 16:39:39,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:39:39,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941163239] [2023-08-30 16:39:39,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941163239] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:39:39,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:39:39,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 16:39:39,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658702264] [2023-08-30 16:39:39,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:39:39,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 16:39:39,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:39:39,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 16:39:39,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 16:39:39,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2023-08-30 16:39:39,306 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 1350 transitions, 22648 flow. Second operand has 8 states, 8 states have (on average 57.625) internal successors, (461), 8 states have internal predecessors, (461), 0 states have call successors, (0), 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 16:39:39,306 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:39:39,306 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2023-08-30 16:39:39,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:39:42,097 INFO L130 PetriNetUnfolder]: 6276/10362 cut-off events. [2023-08-30 16:39:42,098 INFO L131 PetriNetUnfolder]: For 439796/440514 co-relation queries the response was YES. [2023-08-30 16:39:42,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107935 conditions, 10362 events. 6276/10362 cut-off events. For 439796/440514 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 69057 event pairs, 690 based on Foata normal form. 33/10190 useless extension candidates. Maximal degree in co-relation 107493. Up to 7827 conditions per place. [2023-08-30 16:39:42,223 INFO L137 encePairwiseOnDemand]: 135/145 looper letters, 930 selfloop transitions, 79 changer transitions 11/1406 dead transitions. [2023-08-30 16:39:42,224 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 1406 transitions, 25634 flow [2023-08-30 16:39:42,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 16:39:42,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 16:39:42,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 458 transitions. [2023-08-30 16:39:42,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45123152709359604 [2023-08-30 16:39:42,225 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 458 transitions. [2023-08-30 16:39:42,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 458 transitions. [2023-08-30 16:39:42,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:39:42,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 458 transitions. [2023-08-30 16:39:42,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 65.42857142857143) internal successors, (458), 7 states have internal predecessors, (458), 0 states have call successors, (0), 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 16:39:42,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 145.0) internal successors, (1160), 8 states have internal predecessors, (1160), 0 states have call successors, (0), 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 16:39:42,227 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 145.0) internal successors, (1160), 8 states have internal predecessors, (1160), 0 states have call successors, (0), 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 16:39:42,227 INFO L175 Difference]: Start difference. First operand has 315 places, 1350 transitions, 22648 flow. Second operand 7 states and 458 transitions. [2023-08-30 16:39:42,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 1406 transitions, 25634 flow [2023-08-30 16:39:45,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 1406 transitions, 25564 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 16:39:45,150 INFO L231 Difference]: Finished difference. Result has 321 places, 1353 transitions, 22830 flow [2023-08-30 16:39:45,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=22580, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=22830, PETRI_PLACES=321, PETRI_TRANSITIONS=1353} [2023-08-30 16:39:45,151 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2023-08-30 16:39:45,151 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 1353 transitions, 22830 flow [2023-08-30 16:39:45,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 57.625) internal successors, (461), 8 states have internal predecessors, (461), 0 states have call successors, (0), 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 16:39:45,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:39:45,152 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:39:45,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-30 16:39:45,152 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:39:45,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:39:45,152 INFO L85 PathProgramCache]: Analyzing trace with hash -453729481, now seen corresponding path program 1 times [2023-08-30 16:39:45,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:39:45,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940680496] [2023-08-30 16:39:45,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:39:45,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:39:45,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:39:45,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:39:45,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:39:45,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940680496] [2023-08-30 16:39:45,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940680496] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:39:45,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:39:45,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 16:39:45,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999615315] [2023-08-30 16:39:45,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:39:45,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 16:39:45,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:39:45,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 16:39:45,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 16:39:45,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2023-08-30 16:39:45,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 1353 transitions, 22830 flow. Second operand has 8 states, 8 states have (on average 57.625) internal successors, (461), 8 states have internal predecessors, (461), 0 states have call successors, (0), 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 16:39:45,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:39:45,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2023-08-30 16:39:45,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:39:48,434 INFO L130 PetriNetUnfolder]: 6551/10761 cut-off events. [2023-08-30 16:39:48,434 INFO L131 PetriNetUnfolder]: For 463036/463841 co-relation queries the response was YES. [2023-08-30 16:39:48,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113638 conditions, 10761 events. 6551/10761 cut-off events. For 463036/463841 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 71605 event pairs, 720 based on Foata normal form. 33/10563 useless extension candidates. Maximal degree in co-relation 113194. Up to 8113 conditions per place. [2023-08-30 16:39:48,541 INFO L137 encePairwiseOnDemand]: 135/145 looper letters, 970 selfloop transitions, 89 changer transitions 15/1460 dead transitions. [2023-08-30 16:39:48,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 1460 transitions, 27380 flow [2023-08-30 16:39:48,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 16:39:48,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 16:39:48,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 460 transitions. [2023-08-30 16:39:48,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45320197044334976 [2023-08-30 16:39:48,543 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 460 transitions. [2023-08-30 16:39:48,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 460 transitions. [2023-08-30 16:39:48,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:39:48,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 460 transitions. [2023-08-30 16:39:48,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 65.71428571428571) internal successors, (460), 7 states have internal predecessors, (460), 0 states have call successors, (0), 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 16:39:48,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 145.0) internal successors, (1160), 8 states have internal predecessors, (1160), 0 states have call successors, (0), 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 16:39:48,545 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 145.0) internal successors, (1160), 8 states have internal predecessors, (1160), 0 states have call successors, (0), 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 16:39:48,545 INFO L175 Difference]: Start difference. First operand has 321 places, 1353 transitions, 22830 flow. Second operand 7 states and 460 transitions. [2023-08-30 16:39:48,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 1460 transitions, 27380 flow [2023-08-30 16:39:51,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 1460 transitions, 27048 flow, removed 80 selfloop flow, removed 4 redundant places. [2023-08-30 16:39:51,732 INFO L231 Difference]: Finished difference. Result has 326 places, 1422 transitions, 24425 flow [2023-08-30 16:39:51,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=22591, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=24425, PETRI_PLACES=326, PETRI_TRANSITIONS=1422} [2023-08-30 16:39:51,733 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2023-08-30 16:39:51,733 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 1422 transitions, 24425 flow [2023-08-30 16:39:51,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 57.625) internal successors, (461), 8 states have internal predecessors, (461), 0 states have call successors, (0), 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 16:39:51,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:39:51,734 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:39:51,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-30 16:39:51,734 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:39:51,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:39:51,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1594246115, now seen corresponding path program 2 times [2023-08-30 16:39:51,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:39:51,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698025616] [2023-08-30 16:39:51,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:39:51,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:39:51,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:39:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 16:39:51,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:39:51,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698025616] [2023-08-30 16:39:51,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698025616] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:39:51,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:39:51,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 16:39:51,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154747901] [2023-08-30 16:39:51,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:39:51,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 16:39:51,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:39:51,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 16:39:51,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 16:39:51,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2023-08-30 16:39:51,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 1422 transitions, 24425 flow. Second operand has 8 states, 8 states have (on average 57.625) internal successors, (461), 8 states have internal predecessors, (461), 0 states have call successors, (0), 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 16:39:51,952 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:39:51,953 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2023-08-30 16:39:51,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:39:54,952 INFO L130 PetriNetUnfolder]: 6555/10795 cut-off events. [2023-08-30 16:39:54,953 INFO L131 PetriNetUnfolder]: For 468451/469217 co-relation queries the response was YES. [2023-08-30 16:39:55,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114263 conditions, 10795 events. 6555/10795 cut-off events. For 468451/469217 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 71976 event pairs, 704 based on Foata normal form. 26/10601 useless extension candidates. Maximal degree in co-relation 113817. Up to 8126 conditions per place. [2023-08-30 16:39:55,065 INFO L137 encePairwiseOnDemand]: 135/145 looper letters, 966 selfloop transitions, 91 changer transitions 17/1460 dead transitions. [2023-08-30 16:39:55,065 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 1460 transitions, 27411 flow [2023-08-30 16:39:55,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 16:39:55,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 16:39:55,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 458 transitions. [2023-08-30 16:39:55,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45123152709359604 [2023-08-30 16:39:55,066 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 458 transitions. [2023-08-30 16:39:55,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 458 transitions. [2023-08-30 16:39:55,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:39:55,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 458 transitions. [2023-08-30 16:39:55,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 65.42857142857143) internal successors, (458), 7 states have internal predecessors, (458), 0 states have call successors, (0), 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 16:39:55,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 145.0) internal successors, (1160), 8 states have internal predecessors, (1160), 0 states have call successors, (0), 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 16:39:55,068 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 145.0) internal successors, (1160), 8 states have internal predecessors, (1160), 0 states have call successors, (0), 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 16:39:55,068 INFO L175 Difference]: Start difference. First operand has 326 places, 1422 transitions, 24425 flow. Second operand 7 states and 458 transitions. [2023-08-30 16:39:55,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 1460 transitions, 27411 flow [2023-08-30 16:39:58,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 1460 transitions, 27337 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:39:58,073 INFO L231 Difference]: Finished difference. Result has 332 places, 1422 transitions, 24541 flow [2023-08-30 16:39:58,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=24353, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=24541, PETRI_PLACES=332, PETRI_TRANSITIONS=1422} [2023-08-30 16:39:58,074 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2023-08-30 16:39:58,074 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 1422 transitions, 24541 flow [2023-08-30 16:39:58,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 57.625) internal successors, (461), 8 states have internal predecessors, (461), 0 states have call successors, (0), 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 16:39:58,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:39:58,075 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:39:58,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-30 16:39:58,075 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:39:58,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:39:58,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1532964751, now seen corresponding path program 3 times [2023-08-30 16:39:58,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:39:58,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748321640] [2023-08-30 16:39:58,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:39:58,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:39:58,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:39:58,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 16:39:58,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:39:58,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748321640] [2023-08-30 16:39:58,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748321640] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:39:58,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:39:58,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 16:39:58,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445473364] [2023-08-30 16:39:58,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:39:58,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 16:39:58,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:39:58,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 16:39:58,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-30 16:39:58,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2023-08-30 16:39:58,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 1422 transitions, 24541 flow. Second operand has 8 states, 8 states have (on average 57.625) internal successors, (461), 8 states have internal predecessors, (461), 0 states have call successors, (0), 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 16:39:58,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:39:58,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2023-08-30 16:39:58,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:40:01,415 INFO L130 PetriNetUnfolder]: 6557/10805 cut-off events. [2023-08-30 16:40:01,415 INFO L131 PetriNetUnfolder]: For 477793/478489 co-relation queries the response was YES. [2023-08-30 16:40:01,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114874 conditions, 10805 events. 6557/10805 cut-off events. For 477793/478489 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 72025 event pairs, 631 based on Foata normal form. 25/10618 useless extension candidates. Maximal degree in co-relation 114426. Up to 7784 conditions per place. [2023-08-30 16:40:01,710 INFO L137 encePairwiseOnDemand]: 135/145 looper letters, 835 selfloop transitions, 237 changer transitions 18/1476 dead transitions. [2023-08-30 16:40:01,710 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 1476 transitions, 27828 flow [2023-08-30 16:40:01,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 16:40:01,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 16:40:01,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 528 transitions. [2023-08-30 16:40:01,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45517241379310347 [2023-08-30 16:40:01,711 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 528 transitions. [2023-08-30 16:40:01,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 528 transitions. [2023-08-30 16:40:01,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:40:01,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 528 transitions. [2023-08-30 16:40:01,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 66.0) internal successors, (528), 8 states have internal predecessors, (528), 0 states have call successors, (0), 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 16:40:01,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 145.0) internal successors, (1305), 9 states have internal predecessors, (1305), 0 states have call successors, (0), 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 16:40:01,713 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 145.0) internal successors, (1305), 9 states have internal predecessors, (1305), 0 states have call successors, (0), 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 16:40:01,713 INFO L175 Difference]: Start difference. First operand has 332 places, 1422 transitions, 24541 flow. Second operand 8 states and 528 transitions. [2023-08-30 16:40:01,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 1476 transitions, 27828 flow [2023-08-30 16:40:04,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 1476 transitions, 27586 flow, removed 59 selfloop flow, removed 3 redundant places. [2023-08-30 16:40:04,724 INFO L231 Difference]: Finished difference. Result has 338 places, 1424 transitions, 24931 flow [2023-08-30 16:40:04,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=24299, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=24931, PETRI_PLACES=338, PETRI_TRANSITIONS=1424} [2023-08-30 16:40:04,725 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2023-08-30 16:40:04,725 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 1424 transitions, 24931 flow [2023-08-30 16:40:04,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 57.625) internal successors, (461), 8 states have internal predecessors, (461), 0 states have call successors, (0), 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 16:40:04,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:40:04,725 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:40:04,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-30 16:40:04,725 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:40:04,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:40:04,726 INFO L85 PathProgramCache]: Analyzing trace with hash -367099713, now seen corresponding path program 4 times [2023-08-30 16:40:04,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:40:04,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339928955] [2023-08-30 16:40:04,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:40:04,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:40:04,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:40:04,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 16:40:04,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:40:04,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339928955] [2023-08-30 16:40:04,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339928955] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:40:04,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:40:04,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-30 16:40:04,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438420855] [2023-08-30 16:40:04,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:40:04,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 16:40:04,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:40:04,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 16:40:04,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-30 16:40:05,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 145 [2023-08-30 16:40:05,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 1424 transitions, 24931 flow. Second operand has 9 states, 9 states have (on average 55.44444444444444) internal successors, (499), 9 states have internal predecessors, (499), 0 states have call successors, (0), 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 16:40:05,025 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:40:05,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 145 [2023-08-30 16:40:05,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:40:08,019 INFO L130 PetriNetUnfolder]: 6633/10912 cut-off events. [2023-08-30 16:40:08,019 INFO L131 PetriNetUnfolder]: For 492990/493752 co-relation queries the response was YES. [2023-08-30 16:40:08,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116980 conditions, 10912 events. 6633/10912 cut-off events. For 492990/493752 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 72716 event pairs, 728 based on Foata normal form. 39/10739 useless extension candidates. Maximal degree in co-relation 116512. Up to 8144 conditions per place. [2023-08-30 16:40:08,133 INFO L137 encePairwiseOnDemand]: 134/145 looper letters, 983 selfloop transitions, 102 changer transitions 18/1489 dead transitions. [2023-08-30 16:40:08,133 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 1489 transitions, 28377 flow [2023-08-30 16:40:08,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 16:40:08,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 16:40:08,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 504 transitions. [2023-08-30 16:40:08,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43448275862068964 [2023-08-30 16:40:08,134 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 504 transitions. [2023-08-30 16:40:08,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 504 transitions. [2023-08-30 16:40:08,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:40:08,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 504 transitions. [2023-08-30 16:40:08,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 63.0) internal successors, (504), 8 states have internal predecessors, (504), 0 states have call successors, (0), 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 16:40:08,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 145.0) internal successors, (1305), 9 states have internal predecessors, (1305), 0 states have call successors, (0), 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 16:40:08,136 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 145.0) internal successors, (1305), 9 states have internal predecessors, (1305), 0 states have call successors, (0), 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 16:40:08,136 INFO L175 Difference]: Start difference. First operand has 338 places, 1424 transitions, 24931 flow. Second operand 8 states and 504 transitions. [2023-08-30 16:40:08,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 1489 transitions, 28377 flow [2023-08-30 16:40:11,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 1489 transitions, 28175 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 16:40:11,197 INFO L231 Difference]: Finished difference. Result has 344 places, 1428 transitions, 25038 flow [2023-08-30 16:40:11,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=24734, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=25038, PETRI_PLACES=344, PETRI_TRANSITIONS=1428} [2023-08-30 16:40:11,198 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2023-08-30 16:40:11,198 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 1428 transitions, 25038 flow [2023-08-30 16:40:11,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.44444444444444) internal successors, (499), 9 states have internal predecessors, (499), 0 states have call successors, (0), 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 16:40:11,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:40:11,198 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:40:11,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-30 16:40:11,198 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:40:11,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:40:11,199 INFO L85 PathProgramCache]: Analyzing trace with hash 300539326, now seen corresponding path program 1 times [2023-08-30 16:40:11,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:40:11,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093806702] [2023-08-30 16:40:11,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:40:11,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:40:11,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:40:11,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 16:40:11,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:40:11,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093806702] [2023-08-30 16:40:11,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093806702] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:40:11,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:40:11,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 16:40:11,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569128481] [2023-08-30 16:40:11,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:40:11,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 16:40:11,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:40:11,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 16:40:11,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-30 16:40:11,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2023-08-30 16:40:11,510 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 1428 transitions, 25038 flow. Second operand has 8 states, 8 states have (on average 57.625) internal successors, (461), 8 states have internal predecessors, (461), 0 states have call successors, (0), 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 16:40:11,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:40:11,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2023-08-30 16:40:11,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:40:14,563 INFO L130 PetriNetUnfolder]: 6637/10952 cut-off events. [2023-08-30 16:40:14,563 INFO L131 PetriNetUnfolder]: For 503977/504676 co-relation queries the response was YES. [2023-08-30 16:40:14,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117782 conditions, 10952 events. 6637/10952 cut-off events. For 503977/504676 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 73211 event pairs, 673 based on Foata normal form. 19/10779 useless extension candidates. Maximal degree in co-relation 117312. Up to 7934 conditions per place. [2023-08-30 16:40:14,671 INFO L137 encePairwiseOnDemand]: 135/145 looper letters, 853 selfloop transitions, 226 changer transitions 18/1483 dead transitions. [2023-08-30 16:40:14,671 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 1483 transitions, 28567 flow [2023-08-30 16:40:14,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 16:40:14,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 16:40:14,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 531 transitions. [2023-08-30 16:40:14,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45775862068965517 [2023-08-30 16:40:14,672 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 531 transitions. [2023-08-30 16:40:14,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 531 transitions. [2023-08-30 16:40:14,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:40:14,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 531 transitions. [2023-08-30 16:40:14,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 66.375) internal successors, (531), 8 states have internal predecessors, (531), 0 states have call successors, (0), 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 16:40:14,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 145.0) internal successors, (1305), 9 states have internal predecessors, (1305), 0 states have call successors, (0), 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 16:40:14,674 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 145.0) internal successors, (1305), 9 states have internal predecessors, (1305), 0 states have call successors, (0), 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 16:40:14,674 INFO L175 Difference]: Start difference. First operand has 344 places, 1428 transitions, 25038 flow. Second operand 8 states and 531 transitions. [2023-08-30 16:40:14,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 1483 transitions, 28567 flow [2023-08-30 16:40:17,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 1483 transitions, 28456 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-30 16:40:17,710 INFO L231 Difference]: Finished difference. Result has 349 places, 1433 transitions, 25595 flow [2023-08-30 16:40:17,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=24927, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=25595, PETRI_PLACES=349, PETRI_TRANSITIONS=1433} [2023-08-30 16:40:17,711 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2023-08-30 16:40:17,711 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 1433 transitions, 25595 flow [2023-08-30 16:40:17,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 57.625) internal successors, (461), 8 states have internal predecessors, (461), 0 states have call successors, (0), 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 16:40:17,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:40:17,711 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:40:17,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-30 16:40:17,711 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:40:17,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:40:17,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1196734402, now seen corresponding path program 11 times [2023-08-30 16:40:17,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:40:17,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380081743] [2023-08-30 16:40:17,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:40:17,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:40:17,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:40:17,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:40:17,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:40:17,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380081743] [2023-08-30 16:40:17,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380081743] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:40:17,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177458145] [2023-08-30 16:40:17,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 16:40:17,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:40:17,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:40:17,869 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:40:17,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 16:40:17,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 16:40:17,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:40:17,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 16:40:17,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:40:17,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 16:40:18,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 16:40:18,035 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 16:40:18,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 16:40:18,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-08-30 16:40:18,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:40:18,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:40:18,183 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:40:18,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2023-08-30 16:40:18,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2023-08-30 16:40:18,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2023-08-30 16:40:18,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:40:18,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177458145] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:40:18,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:40:18,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 19 [2023-08-30 16:40:18,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995818516] [2023-08-30 16:40:18,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:40:18,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 16:40:18,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:40:18,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 16:40:18,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=307, Unknown=4, NotChecked=0, Total=380 [2023-08-30 16:40:18,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 145 [2023-08-30 16:40:18,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 1433 transitions, 25595 flow. Second operand has 20 states, 20 states have (on average 41.05) internal successors, (821), 20 states have internal predecessors, (821), 0 states have call successors, (0), 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 16:40:18,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:40:18,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 145 [2023-08-30 16:40:18,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:40:25,054 INFO L130 PetriNetUnfolder]: 8648/13932 cut-off events. [2023-08-30 16:40:25,054 INFO L131 PetriNetUnfolder]: For 696325/696355 co-relation queries the response was YES. [2023-08-30 16:40:25,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151573 conditions, 13932 events. 8648/13932 cut-off events. For 696325/696355 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 91560 event pairs, 419 based on Foata normal form. 471/14384 useless extension candidates. Maximal degree in co-relation 151063. Up to 4640 conditions per place. [2023-08-30 16:40:25,184 INFO L137 encePairwiseOnDemand]: 126/145 looper letters, 548 selfloop transitions, 1135 changer transitions 497/2182 dead transitions. [2023-08-30 16:40:25,184 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 2182 transitions, 43641 flow [2023-08-30 16:40:25,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-30 16:40:25,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-30 16:40:25,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2010 transitions. [2023-08-30 16:40:25,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35543766578249336 [2023-08-30 16:40:25,186 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2010 transitions. [2023-08-30 16:40:25,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2010 transitions. [2023-08-30 16:40:25,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:40:25,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2010 transitions. [2023-08-30 16:40:25,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 51.53846153846154) internal successors, (2010), 39 states have internal predecessors, (2010), 0 states have call successors, (0), 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 16:40:25,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 145.0) internal successors, (5800), 40 states have internal predecessors, (5800), 0 states have call successors, (0), 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 16:40:25,192 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 145.0) internal successors, (5800), 40 states have internal predecessors, (5800), 0 states have call successors, (0), 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 16:40:25,192 INFO L175 Difference]: Start difference. First operand has 349 places, 1433 transitions, 25595 flow. Second operand 39 states and 2010 transitions. [2023-08-30 16:40:25,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 2182 transitions, 43641 flow [2023-08-30 16:40:29,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 2182 transitions, 43215 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-30 16:40:29,616 INFO L231 Difference]: Finished difference. Result has 408 places, 1450 transitions, 29708 flow [2023-08-30 16:40:29,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=24165, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=971, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=29708, PETRI_PLACES=408, PETRI_TRANSITIONS=1450} [2023-08-30 16:40:29,617 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 365 predicate places. [2023-08-30 16:40:29,617 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 1450 transitions, 29708 flow [2023-08-30 16:40:29,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 41.05) internal successors, (821), 20 states have internal predecessors, (821), 0 states have call successors, (0), 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 16:40:29,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:40:29,617 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:40:29,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 16:40:29,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-30 16:40:29,822 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:40:29,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:40:29,822 INFO L85 PathProgramCache]: Analyzing trace with hash -300023028, now seen corresponding path program 2 times [2023-08-30 16:40:29,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:40:29,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930778485] [2023-08-30 16:40:29,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:40:29,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:40:29,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:40:29,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:40:29,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:40:29,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930778485] [2023-08-30 16:40:29,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930778485] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:40:29,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839695585] [2023-08-30 16:40:29,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 16:40:29,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:40:29,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:40:29,990 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:40:29,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 16:40:30,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 16:40:30,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:40:30,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-30 16:40:30,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:40:30,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 16:40:30,180 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 16:40:30,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 16:40:30,223 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-08-30 16:40:30,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 28 [2023-08-30 16:40:30,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-08-30 16:40:30,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:40:30,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:40:30,322 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_577 (Array Int Int))) (not (= (mod (select (select (store (store |c_#memory_int| |c_thr1Thread1of2ForFork0_~#l~0#1.base| (store (select |c_#memory_int| |c_thr1Thread1of2ForFork0_~#l~0#1.base|) |c_thr1Thread1of2ForFork0_~#l~0#1.offset| c_~t~0)) |c_ULTIMATE.start_thr1_~#l~0#1.base| v_ArrVal_577) |c_thr1Thread1of2ForFork0_~#l~0#1.base|) |c_thr1Thread1of2ForFork0_~#l~0#1.offset|) 4294967296) (mod c_~s~0 4294967296)))) is different from false [2023-08-30 16:40:30,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-30 16:40:30,436 INFO L321 Elim1Store]: treesize reduction 15, result has 64.3 percent of original size [2023-08-30 16:40:30,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 50 [2023-08-30 16:40:30,446 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 16:40:30,451 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:40:30,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 44 [2023-08-30 16:40:30,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:40:30,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839695585] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:40:30,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:40:30,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 10] total 21 [2023-08-30 16:40:30,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451513336] [2023-08-30 16:40:30,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:40:30,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 16:40:30,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:40:30,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 16:40:30,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=4, NotChecked=38, Total=462 [2023-08-30 16:40:30,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 145 [2023-08-30 16:40:30,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 1450 transitions, 29708 flow. Second operand has 22 states, 22 states have (on average 36.77272727272727) internal successors, (809), 22 states have internal predecessors, (809), 0 states have call successors, (0), 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 16:40:30,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:40:30,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 145 [2023-08-30 16:40:30,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:40:37,490 INFO L130 PetriNetUnfolder]: 6906/11472 cut-off events. [2023-08-30 16:40:37,491 INFO L131 PetriNetUnfolder]: For 740010/740039 co-relation queries the response was YES. [2023-08-30 16:40:37,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140246 conditions, 11472 events. 6906/11472 cut-off events. For 740010/740039 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 75875 event pairs, 364 based on Foata normal form. 71/11534 useless extension candidates. Maximal degree in co-relation 139924. Up to 3646 conditions per place. [2023-08-30 16:40:37,607 INFO L137 encePairwiseOnDemand]: 123/145 looper letters, 442 selfloop transitions, 1157 changer transitions 281/1882 dead transitions. [2023-08-30 16:40:37,608 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 1882 transitions, 43075 flow [2023-08-30 16:40:37,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-30 16:40:37,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-30 16:40:37,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 1997 transitions. [2023-08-30 16:40:37,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3130094043887147 [2023-08-30 16:40:37,634 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 1997 transitions. [2023-08-30 16:40:37,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 1997 transitions. [2023-08-30 16:40:37,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:40:37,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 1997 transitions. [2023-08-30 16:40:37,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 45.38636363636363) internal successors, (1997), 44 states have internal predecessors, (1997), 0 states have call successors, (0), 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 16:40:37,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 145.0) internal successors, (6525), 45 states have internal predecessors, (6525), 0 states have call successors, (0), 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 16:40:37,640 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 145.0) internal successors, (6525), 45 states have internal predecessors, (6525), 0 states have call successors, (0), 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 16:40:37,640 INFO L175 Difference]: Start difference. First operand has 408 places, 1450 transitions, 29708 flow. Second operand 44 states and 1997 transitions. [2023-08-30 16:40:37,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 1882 transitions, 43075 flow [2023-08-30 16:40:43,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 1882 transitions, 41747 flow, removed 373 selfloop flow, removed 20 redundant places. [2023-08-30 16:40:43,166 INFO L231 Difference]: Finished difference. Result has 433 places, 1409 transitions, 31792 flow [2023-08-30 16:40:43,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=28456, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1089, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=31792, PETRI_PLACES=433, PETRI_TRANSITIONS=1409} [2023-08-30 16:40:43,170 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 390 predicate places. [2023-08-30 16:40:43,171 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 1409 transitions, 31792 flow [2023-08-30 16:40:43,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 36.77272727272727) internal successors, (809), 22 states have internal predecessors, (809), 0 states have call successors, (0), 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 16:40:43,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:40:43,179 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:40:43,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 16:40:43,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-30 16:40:43,384 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:40:43,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:40:43,384 INFO L85 PathProgramCache]: Analyzing trace with hash 2089631901, now seen corresponding path program 1 times [2023-08-30 16:40:43,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:40:43,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969261957] [2023-08-30 16:40:43,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:40:43,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:40:43,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:40:43,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 16:40:43,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:40:43,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969261957] [2023-08-30 16:40:43,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969261957] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:40:43,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:40:43,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 16:40:43,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367441078] [2023-08-30 16:40:43,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:40:43,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 16:40:43,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:40:43,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 16:40:43,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-30 16:40:43,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 145 [2023-08-30 16:40:43,550 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 1409 transitions, 31792 flow. Second operand has 7 states, 7 states have (on average 64.28571428571429) internal successors, (450), 7 states have internal predecessors, (450), 0 states have call successors, (0), 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 16:40:43,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:40:43,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 145 [2023-08-30 16:40:43,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:40:46,617 INFO L130 PetriNetUnfolder]: 5250/9247 cut-off events. [2023-08-30 16:40:46,617 INFO L131 PetriNetUnfolder]: For 602706/603279 co-relation queries the response was YES. [2023-08-30 16:40:46,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115181 conditions, 9247 events. 5250/9247 cut-off events. For 602706/603279 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 65001 event pairs, 577 based on Foata normal form. 41/9111 useless extension candidates. Maximal degree in co-relation 114505. Up to 4508 conditions per place. [2023-08-30 16:40:46,723 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 448 selfloop transitions, 412 changer transitions 219/1482 dead transitions. [2023-08-30 16:40:46,723 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 1482 transitions, 35653 flow [2023-08-30 16:40:46,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 16:40:46,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 16:40:46,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 584 transitions. [2023-08-30 16:40:46,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503448275862069 [2023-08-30 16:40:46,724 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 584 transitions. [2023-08-30 16:40:46,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 584 transitions. [2023-08-30 16:40:46,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:40:46,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 584 transitions. [2023-08-30 16:40:46,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 73.0) internal successors, (584), 8 states have internal predecessors, (584), 0 states have call successors, (0), 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 16:40:46,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 145.0) internal successors, (1305), 9 states have internal predecessors, (1305), 0 states have call successors, (0), 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 16:40:46,728 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 145.0) internal successors, (1305), 9 states have internal predecessors, (1305), 0 states have call successors, (0), 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 16:40:46,728 INFO L175 Difference]: Start difference. First operand has 433 places, 1409 transitions, 31792 flow. Second operand 8 states and 584 transitions. [2023-08-30 16:40:46,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 1482 transitions, 35653 flow [2023-08-30 16:40:50,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 1482 transitions, 35111 flow, removed 71 selfloop flow, removed 22 redundant places. [2023-08-30 16:40:50,683 INFO L231 Difference]: Finished difference. Result has 403 places, 1231 transitions, 27896 flow [2023-08-30 16:40:50,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=31315, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=412, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=997, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=27896, PETRI_PLACES=403, PETRI_TRANSITIONS=1231} [2023-08-30 16:40:50,685 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2023-08-30 16:40:50,685 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 1231 transitions, 27896 flow [2023-08-30 16:40:50,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 64.28571428571429) internal successors, (450), 7 states have internal predecessors, (450), 0 states have call successors, (0), 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 16:40:50,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:40:50,686 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:40:50,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-30 16:40:50,686 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:40:50,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:40:50,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1694029147, now seen corresponding path program 2 times [2023-08-30 16:40:50,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:40:50,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420785503] [2023-08-30 16:40:50,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:40:50,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:40:50,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:40:50,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 16:40:50,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:40:50,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420785503] [2023-08-30 16:40:50,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420785503] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:40:50,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:40:50,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 16:40:50,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874029371] [2023-08-30 16:40:50,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:40:50,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 16:40:50,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:40:50,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 16:40:50,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-30 16:40:50,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 145 [2023-08-30 16:40:50,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 1231 transitions, 27896 flow. Second operand has 7 states, 7 states have (on average 64.28571428571429) internal successors, (450), 7 states have internal predecessors, (450), 0 states have call successors, (0), 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 16:40:50,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:40:50,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 145 [2023-08-30 16:40:50,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:40:53,593 INFO L130 PetriNetUnfolder]: 4540/8217 cut-off events. [2023-08-30 16:40:53,594 INFO L131 PetriNetUnfolder]: For 494895/495484 co-relation queries the response was YES. [2023-08-30 16:40:53,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100675 conditions, 8217 events. 4540/8217 cut-off events. For 494895/495484 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 58490 event pairs, 488 based on Foata normal form. 31/8075 useless extension candidates. Maximal degree in co-relation 100038. Up to 3773 conditions per place. [2023-08-30 16:40:53,682 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 365 selfloop transitions, 390 changer transitions 207/1322 dead transitions. [2023-08-30 16:40:53,683 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 1322 transitions, 31881 flow [2023-08-30 16:40:53,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 16:40:53,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 16:40:53,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 596 transitions. [2023-08-30 16:40:53,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5137931034482759 [2023-08-30 16:40:53,684 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 596 transitions. [2023-08-30 16:40:53,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 596 transitions. [2023-08-30 16:40:53,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:40:53,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 596 transitions. [2023-08-30 16:40:53,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 74.5) internal successors, (596), 8 states have internal predecessors, (596), 0 states have call successors, (0), 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 16:40:53,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 145.0) internal successors, (1305), 9 states have internal predecessors, (1305), 0 states have call successors, (0), 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 16:40:53,713 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 145.0) internal successors, (1305), 9 states have internal predecessors, (1305), 0 states have call successors, (0), 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 16:40:53,713 INFO L175 Difference]: Start difference. First operand has 403 places, 1231 transitions, 27896 flow. Second operand 8 states and 596 transitions. [2023-08-30 16:40:53,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 1322 transitions, 31881 flow [2023-08-30 16:40:56,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 1322 transitions, 30302 flow, removed 254 selfloop flow, removed 23 redundant places. [2023-08-30 16:40:56,556 INFO L231 Difference]: Finished difference. Result has 380 places, 1069 transitions, 23919 flow [2023-08-30 16:40:56,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=26537, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=385, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=838, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=23919, PETRI_PLACES=380, PETRI_TRANSITIONS=1069} [2023-08-30 16:40:56,557 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 337 predicate places. [2023-08-30 16:40:56,557 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 1069 transitions, 23919 flow [2023-08-30 16:40:56,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 64.28571428571429) internal successors, (450), 7 states have internal predecessors, (450), 0 states have call successors, (0), 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 16:40:56,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:40:56,557 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:40:56,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-30 16:40:56,558 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:40:56,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:40:56,558 INFO L85 PathProgramCache]: Analyzing trace with hash 455635935, now seen corresponding path program 3 times [2023-08-30 16:40:56,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:40:56,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245774955] [2023-08-30 16:40:56,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:40:56,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:40:56,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:40:56,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 16:40:56,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:40:56,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245774955] [2023-08-30 16:40:56,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245774955] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:40:56,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:40:56,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 16:40:56,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389494357] [2023-08-30 16:40:56,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:40:56,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 16:40:56,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:40:56,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 16:40:56,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-30 16:40:56,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 145 [2023-08-30 16:40:56,757 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 1069 transitions, 23919 flow. Second operand has 7 states, 7 states have (on average 64.28571428571429) internal successors, (450), 7 states have internal predecessors, (450), 0 states have call successors, (0), 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 16:40:56,757 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:40:56,757 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 145 [2023-08-30 16:40:56,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:40:58,656 INFO L130 PetriNetUnfolder]: 3697/6729 cut-off events. [2023-08-30 16:40:58,657 INFO L131 PetriNetUnfolder]: For 296771/297113 co-relation queries the response was YES. [2023-08-30 16:40:58,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75167 conditions, 6729 events. 3697/6729 cut-off events. For 296771/297113 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 46711 event pairs, 428 based on Foata normal form. 45/6636 useless extension candidates. Maximal degree in co-relation 74668. Up to 3142 conditions per place. [2023-08-30 16:40:58,734 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 371 selfloop transitions, 265 changer transitions 212/1132 dead transitions. [2023-08-30 16:40:58,734 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 1132 transitions, 26786 flow [2023-08-30 16:40:58,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 16:40:58,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 16:40:58,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 578 transitions. [2023-08-30 16:40:58,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4982758620689655 [2023-08-30 16:40:58,736 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 578 transitions. [2023-08-30 16:40:58,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 578 transitions. [2023-08-30 16:40:58,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:40:58,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 578 transitions. [2023-08-30 16:40:58,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 72.25) internal successors, (578), 8 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:40:58,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 145.0) internal successors, (1305), 9 states have internal predecessors, (1305), 0 states have call successors, (0), 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 16:40:58,737 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 145.0) internal successors, (1305), 9 states have internal predecessors, (1305), 0 states have call successors, (0), 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 16:40:58,738 INFO L175 Difference]: Start difference. First operand has 380 places, 1069 transitions, 23919 flow. Second operand 8 states and 578 transitions. [2023-08-30 16:40:58,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 1132 transitions, 26786 flow [2023-08-30 16:41:00,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 1132 transitions, 24928 flow, removed 13 selfloop flow, removed 27 redundant places. [2023-08-30 16:41:00,687 INFO L231 Difference]: Finished difference. Result has 350 places, 892 transitions, 18326 flow [2023-08-30 16:41:00,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=22062, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1069, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=804, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=18326, PETRI_PLACES=350, PETRI_TRANSITIONS=892} [2023-08-30 16:41:00,688 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 307 predicate places. [2023-08-30 16:41:00,688 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 892 transitions, 18326 flow [2023-08-30 16:41:00,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 64.28571428571429) internal successors, (450), 7 states have internal predecessors, (450), 0 states have call successors, (0), 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 16:41:00,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:41:00,689 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:41:00,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-30 16:41:00,689 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:41:00,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:41:00,689 INFO L85 PathProgramCache]: Analyzing trace with hash -2071155999, now seen corresponding path program 4 times [2023-08-30 16:41:00,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:41:00,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452395607] [2023-08-30 16:41:00,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:41:00,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:41:00,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:41:00,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 16:41:00,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:41:00,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452395607] [2023-08-30 16:41:00,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452395607] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:41:00,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:41:00,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 16:41:00,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898724034] [2023-08-30 16:41:00,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:41:00,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 16:41:00,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:41:00,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 16:41:00,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-30 16:41:00,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 145 [2023-08-30 16:41:00,825 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 892 transitions, 18326 flow. Second operand has 7 states, 7 states have (on average 64.28571428571429) internal successors, (450), 7 states have internal predecessors, (450), 0 states have call successors, (0), 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 16:41:00,825 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:41:00,825 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 145 [2023-08-30 16:41:00,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:41:02,260 INFO L130 PetriNetUnfolder]: 2554/4915 cut-off events. [2023-08-30 16:41:02,260 INFO L131 PetriNetUnfolder]: For 215359/215549 co-relation queries the response was YES. [2023-08-30 16:41:02,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53310 conditions, 4915 events. 2554/4915 cut-off events. For 215359/215549 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 33848 event pairs, 286 based on Foata normal form. 49/4888 useless extension candidates. Maximal degree in co-relation 52942. Up to 1892 conditions per place. [2023-08-30 16:41:02,314 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 242 selfloop transitions, 200 changer transitions 315/955 dead transitions. [2023-08-30 16:41:02,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 955 transitions, 20892 flow [2023-08-30 16:41:02,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 16:41:02,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 16:41:02,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 586 transitions. [2023-08-30 16:41:02,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5051724137931034 [2023-08-30 16:41:02,315 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 586 transitions. [2023-08-30 16:41:02,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 586 transitions. [2023-08-30 16:41:02,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:41:02,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 586 transitions. [2023-08-30 16:41:02,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 73.25) internal successors, (586), 8 states have internal predecessors, (586), 0 states have call successors, (0), 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 16:41:02,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 145.0) internal successors, (1305), 9 states have internal predecessors, (1305), 0 states have call successors, (0), 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 16:41:02,317 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 145.0) internal successors, (1305), 9 states have internal predecessors, (1305), 0 states have call successors, (0), 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 16:41:02,317 INFO L175 Difference]: Start difference. First operand has 350 places, 892 transitions, 18326 flow. Second operand 8 states and 586 transitions. [2023-08-30 16:41:02,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 955 transitions, 20892 flow [2023-08-30 16:41:03,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 955 transitions, 20159 flow, removed 46 selfloop flow, removed 13 redundant places. [2023-08-30 16:41:03,587 INFO L231 Difference]: Finished difference. Result has 343 places, 619 transitions, 12603 flow [2023-08-30 16:41:03,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=17293, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=878, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=678, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12603, PETRI_PLACES=343, PETRI_TRANSITIONS=619} [2023-08-30 16:41:03,588 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 300 predicate places. [2023-08-30 16:41:03,589 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 619 transitions, 12603 flow [2023-08-30 16:41:03,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 64.28571428571429) internal successors, (450), 7 states have internal predecessors, (450), 0 states have call successors, (0), 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 16:41:03,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:41:03,589 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:41:03,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-30 16:41:03,589 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:41:03,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:41:03,589 INFO L85 PathProgramCache]: Analyzing trace with hash -555139671, now seen corresponding path program 5 times [2023-08-30 16:41:03,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:41:03,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614155553] [2023-08-30 16:41:03,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:41:03,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:41:03,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:41:03,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 16:41:03,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:41:03,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614155553] [2023-08-30 16:41:03,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614155553] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:41:03,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:41:03,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 16:41:03,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228795099] [2023-08-30 16:41:03,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:41:03,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 16:41:03,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:41:03,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 16:41:03,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-30 16:41:03,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 145 [2023-08-30 16:41:03,787 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 619 transitions, 12603 flow. Second operand has 7 states, 7 states have (on average 64.28571428571429) internal successors, (450), 7 states have internal predecessors, (450), 0 states have call successors, (0), 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 16:41:03,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:41:03,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 145 [2023-08-30 16:41:03,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:41:04,542 INFO L130 PetriNetUnfolder]: 1704/3455 cut-off events. [2023-08-30 16:41:04,543 INFO L131 PetriNetUnfolder]: For 138112/138296 co-relation queries the response was YES. [2023-08-30 16:41:04,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37067 conditions, 3455 events. 1704/3455 cut-off events. For 138112/138296 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 23499 event pairs, 196 based on Foata normal form. 31/3432 useless extension candidates. Maximal degree in co-relation 36892. Up to 1701 conditions per place. [2023-08-30 16:41:04,574 INFO L137 encePairwiseOnDemand]: 138/145 looper letters, 228 selfloop transitions, 97 changer transitions 175/661 dead transitions. [2023-08-30 16:41:04,574 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 661 transitions, 14278 flow [2023-08-30 16:41:04,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 16:41:04,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 16:41:04,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 506 transitions. [2023-08-30 16:41:04,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49852216748768474 [2023-08-30 16:41:04,575 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 506 transitions. [2023-08-30 16:41:04,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 506 transitions. [2023-08-30 16:41:04,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:41:04,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 506 transitions. [2023-08-30 16:41:04,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 72.28571428571429) internal successors, (506), 7 states have internal predecessors, (506), 0 states have call successors, (0), 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 16:41:04,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 145.0) internal successors, (1160), 8 states have internal predecessors, (1160), 0 states have call successors, (0), 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 16:41:04,579 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 145.0) internal successors, (1160), 8 states have internal predecessors, (1160), 0 states have call successors, (0), 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 16:41:04,579 INFO L175 Difference]: Start difference. First operand has 343 places, 619 transitions, 12603 flow. Second operand 7 states and 506 transitions. [2023-08-30 16:41:04,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 661 transitions, 14278 flow [2023-08-30 16:41:05,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 661 transitions, 13293 flow, removed 47 selfloop flow, removed 27 redundant places. [2023-08-30 16:41:05,137 INFO L231 Difference]: Finished difference. Result has 310 places, 477 transitions, 9119 flow [2023-08-30 16:41:05,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=11670, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9119, PETRI_PLACES=310, PETRI_TRANSITIONS=477} [2023-08-30 16:41:05,138 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2023-08-30 16:41:05,138 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 477 transitions, 9119 flow [2023-08-30 16:41:05,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 64.28571428571429) internal successors, (450), 7 states have internal predecessors, (450), 0 states have call successors, (0), 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 16:41:05,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:41:05,139 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:41:05,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-30 16:41:05,139 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:41:05,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:41:05,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1793462328, now seen corresponding path program 1 times [2023-08-30 16:41:05,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:41:05,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684353545] [2023-08-30 16:41:05,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:41:05,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:41:05,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:41:05,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 16:41:05,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:41:05,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684353545] [2023-08-30 16:41:05,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684353545] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:41:05,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:41:05,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 16:41:05,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266909178] [2023-08-30 16:41:05,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:41:05,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 16:41:05,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:41:05,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 16:41:05,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-30 16:41:05,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 145 [2023-08-30 16:41:05,343 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 477 transitions, 9119 flow. Second operand has 7 states, 7 states have (on average 63.285714285714285) internal successors, (443), 7 states have internal predecessors, (443), 0 states have call successors, (0), 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 16:41:05,343 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:41:05,343 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 145 [2023-08-30 16:41:05,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:41:05,797 INFO L130 PetriNetUnfolder]: 1109/2185 cut-off events. [2023-08-30 16:41:05,798 INFO L131 PetriNetUnfolder]: For 83702/83810 co-relation queries the response was YES. [2023-08-30 16:41:05,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23049 conditions, 2185 events. 1109/2185 cut-off events. For 83702/83810 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 13198 event pairs, 101 based on Foata normal form. 32/2184 useless extension candidates. Maximal degree in co-relation 22948. Up to 763 conditions per place. [2023-08-30 16:41:05,816 INFO L137 encePairwiseOnDemand]: 138/145 looper letters, 163 selfloop transitions, 98 changer transitions 139/511 dead transitions. [2023-08-30 16:41:05,816 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 511 transitions, 10638 flow [2023-08-30 16:41:05,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 16:41:05,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 16:41:05,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 550 transitions. [2023-08-30 16:41:05,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47413793103448276 [2023-08-30 16:41:05,817 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 550 transitions. [2023-08-30 16:41:05,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 550 transitions. [2023-08-30 16:41:05,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:41:05,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 550 transitions. [2023-08-30 16:41:05,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 68.75) internal successors, (550), 8 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:41:05,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 145.0) internal successors, (1305), 9 states have internal predecessors, (1305), 0 states have call successors, (0), 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 16:41:05,819 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 145.0) internal successors, (1305), 9 states have internal predecessors, (1305), 0 states have call successors, (0), 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 16:41:05,819 INFO L175 Difference]: Start difference. First operand has 310 places, 477 transitions, 9119 flow. Second operand 8 states and 550 transitions. [2023-08-30 16:41:05,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 511 transitions, 10638 flow [2023-08-30 16:41:06,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 511 transitions, 9811 flow, removed 70 selfloop flow, removed 22 redundant places. [2023-08-30 16:41:06,095 INFO L231 Difference]: Finished difference. Result has 282 places, 362 transitions, 6056 flow [2023-08-30 16:41:06,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=8341, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6056, PETRI_PLACES=282, PETRI_TRANSITIONS=362} [2023-08-30 16:41:06,096 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2023-08-30 16:41:06,096 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 362 transitions, 6056 flow [2023-08-30 16:41:06,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 63.285714285714285) internal successors, (443), 7 states have internal predecessors, (443), 0 states have call successors, (0), 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 16:41:06,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:41:06,097 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:41:06,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-30 16:41:06,097 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:41:06,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:41:06,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1753542902, now seen corresponding path program 1 times [2023-08-30 16:41:06,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:41:06,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396809099] [2023-08-30 16:41:06,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:41:06,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:41:06,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:41:06,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 16:41:06,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:41:06,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396809099] [2023-08-30 16:41:06,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396809099] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:41:06,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:41:06,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 16:41:06,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668261291] [2023-08-30 16:41:06,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:41:06,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 16:41:06,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:41:06,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 16:41:06,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-30 16:41:06,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 145 [2023-08-30 16:41:06,220 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 362 transitions, 6056 flow. Second operand has 7 states, 7 states have (on average 63.285714285714285) internal successors, (443), 7 states have internal predecessors, (443), 0 states have call successors, (0), 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 16:41:06,220 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:41:06,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 145 [2023-08-30 16:41:06,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:41:06,482 INFO L130 PetriNetUnfolder]: 593/1194 cut-off events. [2023-08-30 16:41:06,482 INFO L131 PetriNetUnfolder]: For 40409/40451 co-relation queries the response was YES. [2023-08-30 16:41:06,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11309 conditions, 1194 events. 593/1194 cut-off events. For 40409/40451 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7317 event pairs, 45 based on Foata normal form. 27/1206 useless extension candidates. Maximal degree in co-relation 11219. Up to 310 conditions per place. [2023-08-30 16:41:06,489 INFO L137 encePairwiseOnDemand]: 138/145 looper letters, 0 selfloop transitions, 0 changer transitions 335/335 dead transitions. [2023-08-30 16:41:06,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 335 transitions, 6240 flow [2023-08-30 16:41:06,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 16:41:06,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 16:41:06,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 538 transitions. [2023-08-30 16:41:06,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46379310344827585 [2023-08-30 16:41:06,491 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 538 transitions. [2023-08-30 16:41:06,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 538 transitions. [2023-08-30 16:41:06,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:41:06,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 538 transitions. [2023-08-30 16:41:06,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 67.25) internal successors, (538), 8 states have internal predecessors, (538), 0 states have call successors, (0), 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 16:41:06,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 145.0) internal successors, (1305), 9 states have internal predecessors, (1305), 0 states have call successors, (0), 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 16:41:06,492 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 145.0) internal successors, (1305), 9 states have internal predecessors, (1305), 0 states have call successors, (0), 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 16:41:06,492 INFO L175 Difference]: Start difference. First operand has 282 places, 362 transitions, 6056 flow. Second operand 8 states and 538 transitions. [2023-08-30 16:41:06,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 335 transitions, 6240 flow [2023-08-30 16:41:06,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 335 transitions, 5401 flow, removed 69 selfloop flow, removed 28 redundant places. [2023-08-30 16:41:06,591 INFO L231 Difference]: Finished difference. Result has 238 places, 0 transitions, 0 flow [2023-08-30 16:41:06,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=4552, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=238, PETRI_TRANSITIONS=0} [2023-08-30 16:41:06,592 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2023-08-30 16:41:06,592 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 0 transitions, 0 flow [2023-08-30 16:41:06,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 63.285714285714285) internal successors, (443), 7 states have internal predecessors, (443), 0 states have call successors, (0), 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 16:41:06,592 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-30 16:41:06,592 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-30 16:41:06,593 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-30 16:41:06,593 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-30 16:41:06,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-30 16:41:06,593 INFO L445 BasicCegarLoop]: Path program histogram: [11, 5, 4, 4, 2, 2, 1, 1, 1, 1] [2023-08-30 16:41:06,593 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 16:41:06,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 88 transitions, 188 flow [2023-08-30 16:41:06,599 INFO L130 PetriNetUnfolder]: 13/162 cut-off events. [2023-08-30 16:41:06,599 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:41:06,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 162 events. 13/162 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 410 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 107. Up to 6 conditions per place. [2023-08-30 16:41:06,600 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 88 transitions, 188 flow [2023-08-30 16:41:06,600 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 88 transitions, 188 flow [2023-08-30 16:41:06,600 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:41:06,600 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 88 transitions, 188 flow [2023-08-30 16:41:06,601 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 88 transitions, 188 flow [2023-08-30 16:41:06,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 88 transitions, 188 flow [2023-08-30 16:41:06,605 INFO L130 PetriNetUnfolder]: 13/162 cut-off events. [2023-08-30 16:41:06,606 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:41:06,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 162 events. 13/162 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 410 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 107. Up to 6 conditions per place. [2023-08-30 16:41:06,607 INFO L119 LiptonReduction]: Number of co-enabled transitions 3264 [2023-08-30 16:41:07,366 INFO L134 LiptonReduction]: Checked pairs total: 12084 [2023-08-30 16:41:07,366 INFO L136 LiptonReduction]: Total number of compositions: 57 [2023-08-30 16:41:07,367 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 16:41:07,368 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;@2db21795, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:41:07,368 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 16:41:07,370 INFO L130 PetriNetUnfolder]: 7/50 cut-off events. [2023-08-30 16:41:07,370 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:41:07,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:41:07,370 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 16:41:07,370 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:41:07,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:41:07,371 INFO L85 PathProgramCache]: Analyzing trace with hash -2043685391, now seen corresponding path program 1 times [2023-08-30 16:41:07,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:41:07,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3243700] [2023-08-30 16:41:07,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:41:07,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:41:07,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:41:07,375 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:41:07,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:41:07,380 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:41:07,380 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:41:07,380 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 16:41:07,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-08-30 16:41:07,380 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:41:07,380 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 16:41:07,381 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 16:41:07,381 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 16:41:07,400 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:41:07,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 106 transitions, 233 flow [2023-08-30 16:41:07,410 INFO L130 PetriNetUnfolder]: 18/218 cut-off events. [2023-08-30 16:41:07,411 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 16:41:07,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 218 events. 18/218 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 624 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 166. Up to 8 conditions per place. [2023-08-30 16:41:07,413 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 106 transitions, 233 flow [2023-08-30 16:41:07,414 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 106 transitions, 233 flow [2023-08-30 16:41:07,414 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:41:07,414 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 106 transitions, 233 flow [2023-08-30 16:41:07,414 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 106 transitions, 233 flow [2023-08-30 16:41:07,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 106 transitions, 233 flow [2023-08-30 16:41:07,423 INFO L130 PetriNetUnfolder]: 18/218 cut-off events. [2023-08-30 16:41:07,423 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 16:41:07,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 218 events. 18/218 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 624 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 166. Up to 8 conditions per place. [2023-08-30 16:41:07,426 INFO L119 LiptonReduction]: Number of co-enabled transitions 5814 [2023-08-30 16:41:08,118 INFO L134 LiptonReduction]: Checked pairs total: 21518 [2023-08-30 16:41:08,118 INFO L136 LiptonReduction]: Total number of compositions: 65 [2023-08-30 16:41:08,119 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:41:08,119 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;@2db21795, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:41:08,119 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-30 16:41:08,120 INFO L130 PetriNetUnfolder]: 3/19 cut-off events. [2023-08-30 16:41:08,120 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 16:41:08,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:41:08,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 16:41:08,121 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 16:41:08,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:41:08,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1546099564, now seen corresponding path program 1 times [2023-08-30 16:41:08,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:41:08,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893923565] [2023-08-30 16:41:08,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:41:08,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:41:08,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:41:08,154 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 16:41:08,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:41:08,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893923565] [2023-08-30 16:41:08,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893923565] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:41:08,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:41:08,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:41:08,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163196314] [2023-08-30 16:41:08,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:41:08,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:41:08,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:41:08,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:41:08,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:41:08,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 171 [2023-08-30 16:41:08,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 55 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 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 16:41:08,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:41:08,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 171 [2023-08-30 16:41:08,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:41:10,146 INFO L130 PetriNetUnfolder]: 35438/50764 cut-off events. [2023-08-30 16:41:10,146 INFO L131 PetriNetUnfolder]: For 637/637 co-relation queries the response was YES. [2023-08-30 16:41:10,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99666 conditions, 50764 events. 35438/50764 cut-off events. For 637/637 co-relation queries the response was YES. Maximal size of possible extension queue 1543. Compared 336441 event pairs, 18959 based on Foata normal form. 3744/47420 useless extension candidates. Maximal degree in co-relation 23209. Up to 34788 conditions per place. [2023-08-30 16:41:10,309 INFO L137 encePairwiseOnDemand]: 155/171 looper letters, 73 selfloop transitions, 8 changer transitions 0/87 dead transitions. [2023-08-30 16:41:10,309 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 87 transitions, 369 flow [2023-08-30 16:41:10,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:41:10,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:41:10,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 287 transitions. [2023-08-30 16:41:10,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5594541910331384 [2023-08-30 16:41:10,310 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 287 transitions. [2023-08-30 16:41:10,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 287 transitions. [2023-08-30 16:41:10,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:41:10,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 287 transitions. [2023-08-30 16:41:10,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 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 16:41:10,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 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 16:41:10,312 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 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 16:41:10,312 INFO L175 Difference]: Start difference. First operand has 55 places, 55 transitions, 131 flow. Second operand 3 states and 287 transitions. [2023-08-30 16:41:10,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 87 transitions, 369 flow [2023-08-30 16:41:10,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 87 transitions, 361 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-30 16:41:10,313 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 189 flow [2023-08-30 16:41:10,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=189, PETRI_PLACES=57, PETRI_TRANSITIONS=58} [2023-08-30 16:41:10,313 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2023-08-30 16:41:10,314 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 189 flow [2023-08-30 16:41:10,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 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 16:41:10,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:41:10,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:41:10,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-08-30 16:41:10,314 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 16:41:10,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:41:10,314 INFO L85 PathProgramCache]: Analyzing trace with hash 293791546, now seen corresponding path program 1 times [2023-08-30 16:41:10,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:41:10,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364240829] [2023-08-30 16:41:10,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:41:10,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:41:10,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:41:10,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:41:10,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:41:10,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364240829] [2023-08-30 16:41:10,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364240829] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:41:10,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:41:10,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:41:10,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121951342] [2023-08-30 16:41:10,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:41:10,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:41:10,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:41:10,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:41:10,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:41:10,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 171 [2023-08-30 16:41:10,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 58 transitions, 189 flow. Second operand has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 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 16:41:10,406 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:41:10,406 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 171 [2023-08-30 16:41:10,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:41:12,102 INFO L130 PetriNetUnfolder]: 20531/32621 cut-off events. [2023-08-30 16:41:12,103 INFO L131 PetriNetUnfolder]: For 6392/8439 co-relation queries the response was YES. [2023-08-30 16:41:12,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71272 conditions, 32621 events. 20531/32621 cut-off events. For 6392/8439 co-relation queries the response was YES. Maximal size of possible extension queue 1386. Compared 251631 event pairs, 8800 based on Foata normal form. 1097/28997 useless extension candidates. Maximal degree in co-relation 63976. Up to 23869 conditions per place. [2023-08-30 16:41:12,243 INFO L137 encePairwiseOnDemand]: 160/171 looper letters, 69 selfloop transitions, 20 changer transitions 0/112 dead transitions. [2023-08-30 16:41:12,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 112 transitions, 500 flow [2023-08-30 16:41:12,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 16:41:12,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 16:41:12,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 455 transitions. [2023-08-30 16:41:12,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5321637426900585 [2023-08-30 16:41:12,245 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 455 transitions. [2023-08-30 16:41:12,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 455 transitions. [2023-08-30 16:41:12,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:41:12,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 455 transitions. [2023-08-30 16:41:12,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 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 16:41:12,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 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 16:41:12,246 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 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 16:41:12,246 INFO L175 Difference]: Start difference. First operand has 57 places, 58 transitions, 189 flow. Second operand 5 states and 455 transitions. [2023-08-30 16:41:12,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 112 transitions, 500 flow [2023-08-30 16:41:12,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 112 transitions, 484 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:41:12,258 INFO L231 Difference]: Finished difference. Result has 61 places, 77 transitions, 291 flow [2023-08-30 16:41:12,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=291, PETRI_PLACES=61, PETRI_TRANSITIONS=77} [2023-08-30 16:41:12,259 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 6 predicate places. [2023-08-30 16:41:12,259 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 77 transitions, 291 flow [2023-08-30 16:41:12,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 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 16:41:12,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:41:12,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:41:12,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-08-30 16:41:12,260 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 16:41:12,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:41:12,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1314746088, now seen corresponding path program 2 times [2023-08-30 16:41:12,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:41:12,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426867749] [2023-08-30 16:41:12,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:41:12,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:41:12,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:41:12,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:41:12,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:41:12,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426867749] [2023-08-30 16:41:12,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426867749] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:41:12,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:41:12,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:41:12,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072498698] [2023-08-30 16:41:12,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:41:12,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:41:12,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:41:12,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:41:12,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:41:12,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 171 [2023-08-30 16:41:12,342 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 77 transitions, 291 flow. Second operand has 5 states, 5 states have (on average 74.0) internal successors, (370), 5 states have internal predecessors, (370), 0 states have call successors, (0), 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 16:41:12,342 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:41:12,342 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 171 [2023-08-30 16:41:12,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:41:14,012 INFO L130 PetriNetUnfolder]: 20527/32581 cut-off events. [2023-08-30 16:41:14,012 INFO L131 PetriNetUnfolder]: For 9803/12361 co-relation queries the response was YES. [2023-08-30 16:41:14,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75388 conditions, 32581 events. 20527/32581 cut-off events. For 9803/12361 co-relation queries the response was YES. Maximal size of possible extension queue 1415. Compared 251188 event pairs, 8802 based on Foata normal form. 1184/30413 useless extension candidates. Maximal degree in co-relation 67718. Up to 23876 conditions per place. [2023-08-30 16:41:14,211 INFO L137 encePairwiseOnDemand]: 161/171 looper letters, 75 selfloop transitions, 19 changer transitions 0/117 dead transitions. [2023-08-30 16:41:14,211 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 117 transitions, 599 flow [2023-08-30 16:41:14,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 16:41:14,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 16:41:14,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 448 transitions. [2023-08-30 16:41:14,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5239766081871345 [2023-08-30 16:41:14,212 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 448 transitions. [2023-08-30 16:41:14,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 448 transitions. [2023-08-30 16:41:14,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:41:14,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 448 transitions. [2023-08-30 16:41:14,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 89.6) internal successors, (448), 5 states have internal predecessors, (448), 0 states have call successors, (0), 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 16:41:14,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 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 16:41:14,214 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 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 16:41:14,214 INFO L175 Difference]: Start difference. First operand has 61 places, 77 transitions, 291 flow. Second operand 5 states and 448 transitions. [2023-08-30 16:41:14,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 117 transitions, 599 flow [2023-08-30 16:41:14,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 117 transitions, 599 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 16:41:14,217 INFO L231 Difference]: Finished difference. Result has 66 places, 83 transitions, 374 flow [2023-08-30 16:41:14,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=374, PETRI_PLACES=66, PETRI_TRANSITIONS=83} [2023-08-30 16:41:14,218 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 11 predicate places. [2023-08-30 16:41:14,218 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 83 transitions, 374 flow [2023-08-30 16:41:14,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.0) internal successors, (370), 5 states have internal predecessors, (370), 0 states have call successors, (0), 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 16:41:14,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:41:14,218 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:41:14,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-08-30 16:41:14,219 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 16:41:14,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:41:14,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1550746096, now seen corresponding path program 1 times [2023-08-30 16:41:14,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:41:14,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60062371] [2023-08-30 16:41:14,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:41:14,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:41:14,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:41:14,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:41:14,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:41:14,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60062371] [2023-08-30 16:41:14,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60062371] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:41:14,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:41:14,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:41:14,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232982872] [2023-08-30 16:41:14,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:41:14,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:41:14,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:41:14,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:41:14,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:41:14,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 171 [2023-08-30 16:41:14,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 83 transitions, 374 flow. Second operand has 5 states, 5 states have (on average 75.2) internal successors, (376), 5 states have internal predecessors, (376), 0 states have call successors, (0), 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 16:41:14,320 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:41:14,320 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 171 [2023-08-30 16:41:14,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:41:15,988 INFO L130 PetriNetUnfolder]: 20271/32215 cut-off events. [2023-08-30 16:41:15,988 INFO L131 PetriNetUnfolder]: For 18707/21735 co-relation queries the response was YES. [2023-08-30 16:41:16,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80067 conditions, 32215 events. 20271/32215 cut-off events. For 18707/21735 co-relation queries the response was YES. Maximal size of possible extension queue 1400. Compared 248337 event pairs, 8771 based on Foata normal form. 1130/30573 useless extension candidates. Maximal degree in co-relation 72369. Up to 23228 conditions per place. [2023-08-30 16:41:16,154 INFO L137 encePairwiseOnDemand]: 160/171 looper letters, 81 selfloop transitions, 20 changer transitions 0/124 dead transitions. [2023-08-30 16:41:16,155 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 124 transitions, 717 flow [2023-08-30 16:41:16,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 16:41:16,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 16:41:16,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 454 transitions. [2023-08-30 16:41:16,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5309941520467836 [2023-08-30 16:41:16,156 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 454 transitions. [2023-08-30 16:41:16,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 454 transitions. [2023-08-30 16:41:16,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:41:16,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 454 transitions. [2023-08-30 16:41:16,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 90.8) internal successors, (454), 5 states have internal predecessors, (454), 0 states have call successors, (0), 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 16:41:16,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 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 16:41:16,157 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 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 16:41:16,157 INFO L175 Difference]: Start difference. First operand has 66 places, 83 transitions, 374 flow. Second operand 5 states and 454 transitions. [2023-08-30 16:41:16,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 124 transitions, 717 flow [2023-08-30 16:41:16,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 124 transitions, 674 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-30 16:41:16,163 INFO L231 Difference]: Finished difference. Result has 68 places, 90 transitions, 431 flow [2023-08-30 16:41:16,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=431, PETRI_PLACES=68, PETRI_TRANSITIONS=90} [2023-08-30 16:41:16,164 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 13 predicate places. [2023-08-30 16:41:16,164 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 90 transitions, 431 flow [2023-08-30 16:41:16,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.2) internal successors, (376), 5 states have internal predecessors, (376), 0 states have call successors, (0), 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 16:41:16,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:41:16,164 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:41:16,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-08-30 16:41:16,164 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 16:41:16,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:41:16,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1002799668, now seen corresponding path program 2 times [2023-08-30 16:41:16,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:41:16,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790362018] [2023-08-30 16:41:16,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:41:16,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:41:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:41:16,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:41:16,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:41:16,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790362018] [2023-08-30 16:41:16,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790362018] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:41:16,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816612148] [2023-08-30 16:41:16,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 16:41:16,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:41:16,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:41:16,331 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:41:16,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 16:41:16,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 16:41:16,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:41:16,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-30 16:41:16,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:41:16,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 16:41:16,467 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-30 16:41:16,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-30 16:41:16,482 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 16:41:16,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 16:41:16,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 16:41:16,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 16:41:16,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:41:16,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:41:16,646 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:41:16,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2023-08-30 16:41:16,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2023-08-30 16:41:16,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-30 16:41:16,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:41:16,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816612148] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:41:16,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:41:16,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 8] total 19 [2023-08-30 16:41:16,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239956055] [2023-08-30 16:41:16,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:41:16,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 16:41:16,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:41:16,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 16:41:16,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=316, Unknown=3, NotChecked=0, Total=380 [2023-08-30 16:41:17,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 171 [2023-08-30 16:41:17,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 90 transitions, 431 flow. Second operand has 20 states, 20 states have (on average 40.95) internal successors, (819), 20 states have internal predecessors, (819), 0 states have call successors, (0), 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 16:41:17,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:41:17,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 171 [2023-08-30 16:41:17,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:41:26,046 INFO L130 PetriNetUnfolder]: 68871/94937 cut-off events. [2023-08-30 16:41:26,046 INFO L131 PetriNetUnfolder]: For 100651/100689 co-relation queries the response was YES. [2023-08-30 16:41:26,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278583 conditions, 94937 events. 68871/94937 cut-off events. For 100651/100689 co-relation queries the response was YES. Maximal size of possible extension queue 2611. Compared 616736 event pairs, 13248 based on Foata normal form. 7287/99034 useless extension candidates. Maximal degree in co-relation 278021. Up to 40718 conditions per place. [2023-08-30 16:41:26,490 INFO L137 encePairwiseOnDemand]: 138/171 looper letters, 507 selfloop transitions, 400 changer transitions 0/910 dead transitions. [2023-08-30 16:41:26,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 910 transitions, 5815 flow [2023-08-30 16:41:26,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-30 16:41:26,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-30 16:41:26,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2406 transitions. [2023-08-30 16:41:26,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35175438596491226 [2023-08-30 16:41:26,493 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2406 transitions. [2023-08-30 16:41:26,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2406 transitions. [2023-08-30 16:41:26,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:41:26,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2406 transitions. [2023-08-30 16:41:26,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 60.15) internal successors, (2406), 40 states have internal predecessors, (2406), 0 states have call successors, (0), 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 16:41:26,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 171.0) internal successors, (7011), 41 states have internal predecessors, (7011), 0 states have call successors, (0), 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 16:41:26,512 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 171.0) internal successors, (7011), 41 states have internal predecessors, (7011), 0 states have call successors, (0), 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 16:41:26,512 INFO L175 Difference]: Start difference. First operand has 68 places, 90 transitions, 431 flow. Second operand 40 states and 2406 transitions. [2023-08-30 16:41:26,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 910 transitions, 5815 flow [2023-08-30 16:41:26,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 910 transitions, 5614 flow, removed 27 selfloop flow, removed 3 redundant places. [2023-08-30 16:41:26,552 INFO L231 Difference]: Finished difference. Result has 136 places, 480 transitions, 4212 flow [2023-08-30 16:41:26,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=4212, PETRI_PLACES=136, PETRI_TRANSITIONS=480} [2023-08-30 16:41:26,553 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 81 predicate places. [2023-08-30 16:41:26,553 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 480 transitions, 4212 flow [2023-08-30 16:41:26,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 40.95) internal successors, (819), 20 states have internal predecessors, (819), 0 states have call successors, (0), 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 16:41:26,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:41:26,554 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:41:26,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 16:41:26,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:41:26,760 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 16:41:26,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:41:26,760 INFO L85 PathProgramCache]: Analyzing trace with hash -315585790, now seen corresponding path program 3 times [2023-08-30 16:41:26,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:41:26,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785311159] [2023-08-30 16:41:26,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:41:26,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:41:26,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:41:26,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:41:26,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:41:26,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785311159] [2023-08-30 16:41:26,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785311159] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:41:26,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337714771] [2023-08-30 16:41:26,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 16:41:26,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:41:26,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:41:26,910 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:41:26,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 16:41:26,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 16:41:26,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:41:27,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-30 16:41:27,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:41:27,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 16:41:27,048 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-30 16:41:27,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-30 16:41:27,104 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 16:41:27,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 16:41:27,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 16:41:27,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 16:41:27,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:41:27,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:41:27,205 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_836 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t~1#1.base| v_ArrVal_836) |c_thr1Thread2of3ForFork0_~#l~0#1.base|) |c_thr1Thread2of3ForFork0_~#l~0#1.offset|) 4294967296) (mod c_~s~0 4294967296)))) is different from false [2023-08-30 16:41:27,212 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:41:27,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2023-08-30 16:41:27,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2023-08-30 16:41:27,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-30 16:41:27,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2023-08-30 16:41:27,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337714771] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:41:27,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:41:27,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 20 [2023-08-30 16:41:27,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120905334] [2023-08-30 16:41:27,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:41:27,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 16:41:27,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:41:27,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 16:41:27,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=311, Unknown=1, NotChecked=36, Total=420 [2023-08-30 16:41:27,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 171 [2023-08-30 16:41:27,678 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 480 transitions, 4212 flow. Second operand has 21 states, 21 states have (on average 40.904761904761905) internal successors, (859), 21 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:41:27,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:41:27,678 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 171 [2023-08-30 16:41:27,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:41:48,121 INFO L130 PetriNetUnfolder]: 109302/150798 cut-off events. [2023-08-30 16:41:48,121 INFO L131 PetriNetUnfolder]: For 2071899/2071917 co-relation queries the response was YES. [2023-08-30 16:41:48,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 826739 conditions, 150798 events. 109302/150798 cut-off events. For 2071899/2071917 co-relation queries the response was YES. Maximal size of possible extension queue 4384. Compared 1029844 event pairs, 3744 based on Foata normal form. 2420/148131 useless extension candidates. Maximal degree in co-relation 825608. Up to 38097 conditions per place. [2023-08-30 16:41:49,365 INFO L137 encePairwiseOnDemand]: 128/171 looper letters, 707 selfloop transitions, 1221 changer transitions 23/1954 dead transitions. [2023-08-30 16:41:49,365 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 1954 transitions, 21183 flow [2023-08-30 16:41:49,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-08-30 16:41:49,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-08-30 16:41:49,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 3213 transitions. [2023-08-30 16:41:49,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3757894736842105 [2023-08-30 16:41:49,368 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 3213 transitions. [2023-08-30 16:41:49,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 3213 transitions. [2023-08-30 16:41:49,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:41:49,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 3213 transitions. [2023-08-30 16:41:49,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 64.26) internal successors, (3213), 50 states have internal predecessors, (3213), 0 states have call successors, (0), 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 16:41:49,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 171.0) internal successors, (8721), 51 states have internal predecessors, (8721), 0 states have call successors, (0), 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 16:41:49,376 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 171.0) internal successors, (8721), 51 states have internal predecessors, (8721), 0 states have call successors, (0), 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 16:41:49,376 INFO L175 Difference]: Start difference. First operand has 136 places, 480 transitions, 4212 flow. Second operand 50 states and 3213 transitions. [2023-08-30 16:41:49,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 1954 transitions, 21183 flow [2023-08-30 16:42:14,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 1954 transitions, 20037 flow, removed 527 selfloop flow, removed 3 redundant places. [2023-08-30 16:42:14,160 INFO L231 Difference]: Finished difference. Result has 217 places, 1385 transitions, 16292 flow [2023-08-30 16:42:14,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=3821, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=404, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=16292, PETRI_PLACES=217, PETRI_TRANSITIONS=1385} [2023-08-30 16:42:14,161 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 162 predicate places. [2023-08-30 16:42:14,161 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 1385 transitions, 16292 flow [2023-08-30 16:42:14,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 40.904761904761905) internal successors, (859), 21 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:42:14,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:42:14,162 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:42:14,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 16:42:14,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-08-30 16:42:14,366 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 16:42:14,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:42:14,367 INFO L85 PathProgramCache]: Analyzing trace with hash -50692596, now seen corresponding path program 4 times [2023-08-30 16:42:14,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:42:14,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997617476] [2023-08-30 16:42:14,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:42:14,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:42:14,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:42:14,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:42:14,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:42:14,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997617476] [2023-08-30 16:42:14,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997617476] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:42:14,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534015855] [2023-08-30 16:42:14,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 16:42:14,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:42:14,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:42:14,474 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:42:14,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 16:42:14,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 16:42:14,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:42:14,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 16:42:14,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:42:14,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 16:42:14,611 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 16:42:14,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 16:42:14,689 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-08-30 16:42:14,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 28 [2023-08-30 16:42:14,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 16:42:14,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:42:14,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:42:14,772 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_872 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t~1#1.base| v_ArrVal_872) |c_thr1Thread1of3ForFork0_~#l~0#1.base|) |c_thr1Thread1of3ForFork0_~#l~0#1.offset|) 4294967296) (mod c_~s~0 4294967296)))) is different from false [2023-08-30 16:42:14,780 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_872 (Array Int Int))) (not (= (mod (select (select (store (store |c_#memory_int| |c_thr1Thread1of3ForFork0_~#l~0#1.base| (store (select |c_#memory_int| |c_thr1Thread1of3ForFork0_~#l~0#1.base|) |c_thr1Thread1of3ForFork0_~#l~0#1.offset| c_~t~0)) |c_ULTIMATE.start_main_~#t~1#1.base| v_ArrVal_872) |c_thr1Thread1of3ForFork0_~#l~0#1.base|) |c_thr1Thread1of3ForFork0_~#l~0#1.offset|) 4294967296) (mod c_~s~0 4294967296)))) is different from false [2023-08-30 16:42:14,801 INFO L321 Elim1Store]: treesize reduction 15, result has 64.3 percent of original size [2023-08-30 16:42:14,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 50 [2023-08-30 16:42:14,817 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:42:14,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 64 [2023-08-30 16:42:14,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-30 16:42:14,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2023-08-30 16:42:14,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534015855] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:42:14,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:42:14,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 9] total 20 [2023-08-30 16:42:14,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127906724] [2023-08-30 16:42:14,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:42:14,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 16:42:14,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:42:14,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 16:42:14,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=285, Unknown=2, NotChecked=70, Total=420 [2023-08-30 16:42:14,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 171 [2023-08-30 16:42:14,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 1385 transitions, 16292 flow. Second operand has 21 states, 21 states have (on average 42.0) internal successors, (882), 21 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:42:14,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:42:14,969 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 171 [2023-08-30 16:42:14,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:43:16,130 INFO L130 PetriNetUnfolder]: 181511/250234 cut-off events. [2023-08-30 16:43:16,131 INFO L131 PetriNetUnfolder]: For 7495979/7497329 co-relation queries the response was YES. [2023-08-30 16:43:18,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2081572 conditions, 250234 events. 181511/250234 cut-off events. For 7495979/7497329 co-relation queries the response was YES. Maximal size of possible extension queue 6937. Compared 1802151 event pairs, 12856 based on Foata normal form. 6426/248900 useless extension candidates. Maximal degree in co-relation 2078165. Up to 97775 conditions per place. [2023-08-30 16:43:19,797 INFO L137 encePairwiseOnDemand]: 133/171 looper letters, 1815 selfloop transitions, 2577 changer transitions 25/4420 dead transitions. [2023-08-30 16:43:19,797 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 4420 transitions, 63388 flow [2023-08-30 16:43:19,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-30 16:43:19,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-30 16:43:19,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2170 transitions. [2023-08-30 16:43:19,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37323701410388715 [2023-08-30 16:43:19,800 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2170 transitions. [2023-08-30 16:43:19,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2170 transitions. [2023-08-30 16:43:19,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:43:19,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2170 transitions. [2023-08-30 16:43:19,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 63.8235294117647) internal successors, (2170), 34 states have internal predecessors, (2170), 0 states have call successors, (0), 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 16:43:19,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 171.0) internal successors, (5985), 35 states have internal predecessors, (5985), 0 states have call successors, (0), 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 16:43:19,829 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 171.0) internal successors, (5985), 35 states have internal predecessors, (5985), 0 states have call successors, (0), 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 16:43:19,829 INFO L175 Difference]: Start difference. First operand has 217 places, 1385 transitions, 16292 flow. Second operand 34 states and 2170 transitions. [2023-08-30 16:43:19,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 4420 transitions, 63388 flow