./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 TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/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 TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 23:04:41,657 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 23:04:41,659 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 23:04:41,699 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 23:04:41,699 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 23:04:41,703 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 23:04:41,705 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 23:04:41,708 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 23:04:41,710 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 23:04:41,716 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 23:04:41,717 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 23:04:41,720 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 23:04:41,720 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 23:04:41,722 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 23:04:41,723 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 23:04:41,730 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 23:04:41,731 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 23:04:41,732 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 23:04:41,734 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 23:04:41,738 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 23:04:41,740 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 23:04:41,741 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 23:04:41,742 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 23:04:41,743 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 23:04:41,747 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 23:04:41,747 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 23:04:41,748 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 23:04:41,749 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 23:04:41,750 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 23:04:41,751 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 23:04:41,751 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 23:04:41,753 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 23:04:41,754 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 23:04:41,755 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 23:04:41,756 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 23:04:41,756 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 23:04:41,756 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 23:04:41,757 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 23:04:41,757 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 23:04:41,757 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 23:04:41,758 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 23:04:41,760 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 23:04:41,792 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 23:04:41,792 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 23:04:41,793 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 23:04:41,793 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 23:04:41,794 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 23:04:41,794 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 23:04:41,795 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 23:04:41,795 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 23:04:41,795 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 23:04:41,796 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 23:04:41,796 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 23:04:41,796 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 23:04:41,797 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 23:04:41,797 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 23:04:41,797 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 23:04:41,797 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 23:04:41,797 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 23:04:41,798 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 23:04:41,798 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 23:04:41,798 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 23:04:41,798 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 23:04:41,798 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 23:04:41,798 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 23:04:41,799 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 23:04:41,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 23:04:41,799 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 23:04:41,799 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 23:04:41,799 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 23:04:41,800 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 23:04:41,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 23:04:41,800 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 23:04:41,800 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 23:04:41,800 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 23:04:41,801 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 23:04:41,801 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 23:04:41,801 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31f5db4bc5916150a86a586587dbeca1bc7aa37b414274f5dc02856908270171 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 23:04:42,080 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 23:04:42,097 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 23:04:42,100 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 23:04:42,101 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 23:04:42,101 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 23:04:42,102 INFO L432 ainManager$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 23:04:43,348 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 23:04:43,639 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 23:04:43,640 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/48_ticket_lock_low_contention_vs.i [2023-08-30 23:04:43,657 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1214db98c/993cd784687042b383b48bc1ea44e199/FLAG4e4fe6421 [2023-08-30 23:04:43,670 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1214db98c/993cd784687042b383b48bc1ea44e199 [2023-08-30 23:04:43,672 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 23:04:43,673 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 23:04:43,674 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 23:04:43,675 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 23:04:43,677 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 23:04:43,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:04:43" (1/1) ... [2023-08-30 23:04:43,679 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2222a97a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:04:43, skipping insertion in model container [2023-08-30 23:04:43,679 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:04:43" (1/1) ... [2023-08-30 23:04:43,684 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 23:04:43,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 23:04:43,835 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-30 23:04:43,932 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 23:04:43,940 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 23:04:43,947 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 23:04:43,960 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-30 23:04:43,985 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 23:04:43,987 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 23:04:44,015 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 23:04:44,015 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 23:04:44,015 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 23:04:44,021 INFO L208 MainTranslator]: Completed translation [2023-08-30 23:04:44,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:04:44 WrapperNode [2023-08-30 23:04:44,022 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 23:04:44,023 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 23:04:44,023 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 23:04:44,023 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 23:04:44,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:04:44" (1/1) ... [2023-08-30 23:04:44,040 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:04:44" (1/1) ... [2023-08-30 23:04:44,058 INFO L138 Inliner]: procedures = 173, calls = 24, calls flagged for inlining = 5, calls inlined = 7, statements flattened = 109 [2023-08-30 23:04:44,059 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 23:04:44,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 23:04:44,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 23:04:44,060 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 23:04:44,066 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:04:44" (1/1) ... [2023-08-30 23:04:44,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:04:44" (1/1) ... [2023-08-30 23:04:44,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:04:44" (1/1) ... [2023-08-30 23:04:44,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:04:44" (1/1) ... [2023-08-30 23:04:44,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:04:44" (1/1) ... [2023-08-30 23:04:44,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:04:44" (1/1) ... [2023-08-30 23:04:44,078 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:04:44" (1/1) ... [2023-08-30 23:04:44,079 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:04:44" (1/1) ... [2023-08-30 23:04:44,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 23:04:44,082 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 23:04:44,082 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 23:04:44,082 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 23:04:44,083 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:04:44" (1/1) ... [2023-08-30 23:04:44,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 23:04:44,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 23:04:44,112 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 23:04:44,134 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 23:04:44,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 23:04:44,151 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-30 23:04:44,151 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-30 23:04:44,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 23:04:44,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 23:04:44,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 23:04:44,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 23:04:44,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 23:04:44,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 23:04:44,152 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 23:04:44,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 23:04:44,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 23:04:44,153 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 23:04:44,334 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 23:04:44,336 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 23:04:44,516 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 23:04:44,617 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 23:04:44,618 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 23:04:44,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:04:44 BoogieIcfgContainer [2023-08-30 23:04:44,620 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 23:04:44,622 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 23:04:44,622 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 23:04:44,625 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 23:04:44,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 11:04:43" (1/3) ... [2023-08-30 23:04:44,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1148a97f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:04:44, skipping insertion in model container [2023-08-30 23:04:44,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:04:44" (2/3) ... [2023-08-30 23:04:44,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1148a97f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:04:44, skipping insertion in model container [2023-08-30 23:04:44,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:04:44" (3/3) ... [2023-08-30 23:04:44,628 INFO L112 eAbstractionObserver]: Analyzing ICFG 48_ticket_lock_low_contention_vs.i [2023-08-30 23:04:44,635 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 23:04:44,643 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 23:04:44,643 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-30 23:04:44,643 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 23:04:44,718 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:04:44,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 70 transitions, 145 flow [2023-08-30 23:04:44,799 INFO L130 PetriNetUnfolder]: 8/106 cut-off events. [2023-08-30 23:04:44,800 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:04:44,805 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 23:04:44,805 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 70 transitions, 145 flow [2023-08-30 23:04:44,808 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 70 transitions, 145 flow [2023-08-30 23:04:44,811 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:04:44,819 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 70 transitions, 145 flow [2023-08-30 23:04:44,822 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 70 transitions, 145 flow [2023-08-30 23:04:44,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 70 transitions, 145 flow [2023-08-30 23:04:44,862 INFO L130 PetriNetUnfolder]: 8/106 cut-off events. [2023-08-30 23:04:44,863 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:04:44,864 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 23:04:44,867 INFO L119 LiptonReduction]: Number of co-enabled transitions 1326 [2023-08-30 23:04:46,109 INFO L134 LiptonReduction]: Checked pairs total: 3786 [2023-08-30 23:04:46,110 INFO L136 LiptonReduction]: Total number of compositions: 50 [2023-08-30 23:04:46,122 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:04:46,128 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;@eba83be, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:04:46,128 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 23:04:46,137 INFO L130 PetriNetUnfolder]: 2/16 cut-off events. [2023-08-30 23:04:46,137 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:04:46,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:04:46,138 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 23:04:46,139 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 23:04:46,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:04:46,146 INFO L85 PathProgramCache]: Analyzing trace with hash 2028104312, now seen corresponding path program 1 times [2023-08-30 23:04:46,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:04:46,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296776164] [2023-08-30 23:04:46,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:04:46,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:04:46,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:04:46,262 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 23:04:46,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:04:46,316 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 23:04:46,320 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 23:04:46,321 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-30 23:04:46,324 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-30 23:04:46,324 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-30 23:04:46,324 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-30 23:04:46,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 23:04:46,325 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 23:04:46,337 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 23:04:46,338 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 23:04:46,374 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:04:46,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 88 transitions, 188 flow [2023-08-30 23:04:46,425 INFO L130 PetriNetUnfolder]: 13/162 cut-off events. [2023-08-30 23:04:46,425 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 23:04:46,427 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 23:04:46,427 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 88 transitions, 188 flow [2023-08-30 23:04:46,428 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 88 transitions, 188 flow [2023-08-30 23:04:46,428 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:04:46,429 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 88 transitions, 188 flow [2023-08-30 23:04:46,429 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 88 transitions, 188 flow [2023-08-30 23:04:46,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 88 transitions, 188 flow [2023-08-30 23:04:46,458 INFO L130 PetriNetUnfolder]: 13/162 cut-off events. [2023-08-30 23:04:46,458 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 23:04:46,462 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 23:04:46,477 INFO L119 LiptonReduction]: Number of co-enabled transitions 3264 [2023-08-30 23:04:47,598 INFO L134 LiptonReduction]: Checked pairs total: 10424 [2023-08-30 23:04:47,598 INFO L136 LiptonReduction]: Total number of compositions: 57 [2023-08-30 23:04:47,600 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:04:47,601 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;@eba83be, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:04:47,601 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-30 23:04:47,604 INFO L130 PetriNetUnfolder]: 3/19 cut-off events. [2023-08-30 23:04:47,604 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 23:04:47,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:04:47,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 23:04:47,605 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 23:04:47,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:04:47,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1768402372, now seen corresponding path program 1 times [2023-08-30 23:04:47,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:04:47,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630975195] [2023-08-30 23:04:47,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:04:47,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:04:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:04:47,760 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 23:04:47,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:04:47,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630975195] [2023-08-30 23:04:47,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630975195] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:04:47,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:04:47,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:04:47,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33408504] [2023-08-30 23:04:47,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:04:47,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:04:47,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:04:47,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:04:47,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:04:47,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 145 [2023-08-30 23:04:47,816 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 23:04:47,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:04:47,817 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 145 [2023-08-30 23:04:47,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:04:48,180 INFO L130 PetriNetUnfolder]: 1886/3179 cut-off events. [2023-08-30 23:04:48,180 INFO L131 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2023-08-30 23:04:48,184 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 17984 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 23:04:48,196 INFO L137 encePairwiseOnDemand]: 133/145 looper letters, 53 selfloop transitions, 6 changer transitions 0/65 dead transitions. [2023-08-30 23:04:48,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 65 transitions, 265 flow [2023-08-30 23:04:48,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:04:48,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:04:48,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 239 transitions. [2023-08-30 23:04:48,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5494252873563218 [2023-08-30 23:04:48,211 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 239 transitions. [2023-08-30 23:04:48,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 239 transitions. [2023-08-30 23:04:48,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:04:48,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 239 transitions. [2023-08-30 23:04:48,219 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 23:04:48,223 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 23:04:48,224 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 23:04:48,226 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 100 flow. Second operand 3 states and 239 transitions. [2023-08-30 23:04:48,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 65 transitions, 265 flow [2023-08-30 23:04:48,229 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 23:04:48,240 INFO L231 Difference]: Finished difference. Result has 44 places, 44 transitions, 140 flow [2023-08-30 23:04:48,242 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 23:04:48,245 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2023-08-30 23:04:48,245 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 44 transitions, 140 flow [2023-08-30 23:04:48,245 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 23:04:48,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:04:48,246 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 23:04:48,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 23:04:48,246 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 23:04:48,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:04:48,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1537516535, now seen corresponding path program 1 times [2023-08-30 23:04:48,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:04:48,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19040407] [2023-08-30 23:04:48,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:04:48,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:04:48,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:04:48,279 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 23:04:48,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:04:48,296 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 23:04:48,301 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 23:04:48,302 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-30 23:04:48,302 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-30 23:04:48,302 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-30 23:04:48,302 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-30 23:04:48,303 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-30 23:04:48,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 23:04:48,303 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 23:04:48,304 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 23:04:48,304 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 23:04:48,326 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:04:48,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 106 transitions, 233 flow [2023-08-30 23:04:48,348 INFO L130 PetriNetUnfolder]: 18/218 cut-off events. [2023-08-30 23:04:48,348 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 23:04:48,350 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 23:04:48,350 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 106 transitions, 233 flow [2023-08-30 23:04:48,351 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 106 transitions, 233 flow [2023-08-30 23:04:48,351 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:04:48,351 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 106 transitions, 233 flow [2023-08-30 23:04:48,352 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 106 transitions, 233 flow [2023-08-30 23:04:48,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 106 transitions, 233 flow [2023-08-30 23:04:48,370 INFO L130 PetriNetUnfolder]: 18/218 cut-off events. [2023-08-30 23:04:48,370 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 23:04:48,372 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 23:04:48,375 INFO L119 LiptonReduction]: Number of co-enabled transitions 5814 [2023-08-30 23:04:49,558 INFO L134 LiptonReduction]: Checked pairs total: 18567 [2023-08-30 23:04:49,558 INFO L136 LiptonReduction]: Total number of compositions: 65 [2023-08-30 23:04:49,560 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:04:49,561 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;@eba83be, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:04:49,561 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-30 23:04:49,563 INFO L130 PetriNetUnfolder]: 3/19 cut-off events. [2023-08-30 23:04:49,563 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 23:04:49,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:04:49,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 23:04:49,563 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-30 23:04:49,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:04:49,564 INFO L85 PathProgramCache]: Analyzing trace with hash -472896841, now seen corresponding path program 1 times [2023-08-30 23:04:49,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:04:49,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345509783] [2023-08-30 23:04:49,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:04:49,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:04:49,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:04:49,636 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 23:04:49,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:04:49,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345509783] [2023-08-30 23:04:49,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345509783] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:04:49,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:04:49,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:04:49,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611205724] [2023-08-30 23:04:49,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:04:49,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:04:49,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:04:49,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:04:49,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:04:49,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 171 [2023-08-30 23:04:49,659 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 23:04:49,659 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:04:49,659 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 171 [2023-08-30 23:04:49,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:04:53,460 INFO L130 PetriNetUnfolder]: 35438/50764 cut-off events. [2023-08-30 23:04:53,460 INFO L131 PetriNetUnfolder]: For 637/637 co-relation queries the response was YES. [2023-08-30 23:04:53,515 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 336476 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 23:04:53,717 INFO L137 encePairwiseOnDemand]: 155/171 looper letters, 73 selfloop transitions, 8 changer transitions 0/87 dead transitions. [2023-08-30 23:04:53,718 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 87 transitions, 369 flow [2023-08-30 23:04:53,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:04:53,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:04:53,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 287 transitions. [2023-08-30 23:04:53,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5594541910331384 [2023-08-30 23:04:53,724 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 287 transitions. [2023-08-30 23:04:53,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 287 transitions. [2023-08-30 23:04:53,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:04:53,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 287 transitions. [2023-08-30 23:04:53,728 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 23:04:53,731 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 23:04:53,732 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 23:04:53,732 INFO L175 Difference]: Start difference. First operand has 55 places, 55 transitions, 131 flow. Second operand 3 states and 287 transitions. [2023-08-30 23:04:53,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 87 transitions, 369 flow [2023-08-30 23:04:53,737 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 23:04:53,739 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 189 flow [2023-08-30 23:04:53,739 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 23:04:53,741 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2023-08-30 23:04:53,741 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 189 flow [2023-08-30 23:04:53,745 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 23:04:53,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:04:53,745 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 23:04:53,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 23:04:53,745 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-30 23:04:53,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:04:53,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1245068768, now seen corresponding path program 1 times [2023-08-30 23:04:53,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:04:53,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60316863] [2023-08-30 23:04:53,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:04:53,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:04:53,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:04:53,778 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 23:04:53,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:04:53,802 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 23:04:53,803 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 23:04:53,803 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-30 23:04:53,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-30 23:04:53,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-30 23:04:53,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-30 23:04:53,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-30 23:04:53,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-30 23:04:53,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 23:04:53,807 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 23:04:53,808 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 23:04:53,808 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 23:04:53,842 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:04:53,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 124 transitions, 280 flow [2023-08-30 23:04:53,873 INFO L130 PetriNetUnfolder]: 23/274 cut-off events. [2023-08-30 23:04:53,873 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 23:04:53,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 274 events. 23/274 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 822 event pairs, 0 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 226. Up to 10 conditions per place. [2023-08-30 23:04:53,875 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 124 transitions, 280 flow [2023-08-30 23:04:53,877 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 124 transitions, 280 flow [2023-08-30 23:04:53,877 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:04:53,877 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 124 transitions, 280 flow [2023-08-30 23:04:53,877 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 124 transitions, 280 flow [2023-08-30 23:04:53,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 124 transitions, 280 flow [2023-08-30 23:04:53,896 INFO L130 PetriNetUnfolder]: 23/274 cut-off events. [2023-08-30 23:04:53,896 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 23:04:53,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 274 events. 23/274 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 822 event pairs, 0 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 226. Up to 10 conditions per place. [2023-08-30 23:04:53,904 INFO L119 LiptonReduction]: Number of co-enabled transitions 8976 [2023-08-30 23:04:55,132 INFO L134 LiptonReduction]: Checked pairs total: 31692 [2023-08-30 23:04:55,132 INFO L136 LiptonReduction]: Total number of compositions: 74 [2023-08-30 23:04:55,138 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:04:55,139 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;@eba83be, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:04:55,140 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 23:04:55,142 INFO L130 PetriNetUnfolder]: 3/19 cut-off events. [2023-08-30 23:04:55,142 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 23:04:55,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:04:55,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 23:04:55,142 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 23:04:55,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:04:55,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1649960361, now seen corresponding path program 1 times [2023-08-30 23:04:55,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:04:55,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214925344] [2023-08-30 23:04:55,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:04:55,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:04:55,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:04:55,228 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 23:04:55,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:04:55,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214925344] [2023-08-30 23:04:55,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214925344] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:04:55,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:04:55,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:04:55,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70208764] [2023-08-30 23:04:55,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:04:55,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:04:55,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:04:55,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:04:55,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:04:55,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 198 [2023-08-30 23:04:55,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:04:55,259 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:04:55,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 198 [2023-08-30 23:04:55,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:05:25,150 INFO L130 PetriNetUnfolder]: 382713/517813 cut-off events. [2023-08-30 23:05:25,150 INFO L131 PetriNetUnfolder]: For 9396/9396 co-relation queries the response was YES. [2023-08-30 23:05:25,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008788 conditions, 517813 events. 382713/517813 cut-off events. For 9396/9396 co-relation queries the response was YES. Maximal size of possible extension queue 12545. Compared 3876813 event pairs, 209126 based on Foata normal form. 38186/497927 useless extension candidates. Maximal degree in co-relation 81844. Up to 348018 conditions per place. [2023-08-30 23:05:27,761 INFO L137 encePairwiseOnDemand]: 178/198 looper letters, 87 selfloop transitions, 10 changer transitions 0/105 dead transitions. [2023-08-30 23:05:27,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 105 transitions, 457 flow [2023-08-30 23:05:27,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:05:27,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:05:27,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 331 transitions. [2023-08-30 23:05:27,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5572390572390572 [2023-08-30 23:05:27,766 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 331 transitions. [2023-08-30 23:05:27,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 331 transitions. [2023-08-30 23:05:27,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:05:27,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 331 transitions. [2023-08-30 23:05:27,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:05:27,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:05:27,772 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:05:27,772 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 172 flow. Second operand 3 states and 331 transitions. [2023-08-30 23:05:27,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 105 transitions, 457 flow [2023-08-30 23:05:27,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 105 transitions, 439 flow, removed 9 selfloop flow, removed 0 redundant places. [2023-08-30 23:05:27,782 INFO L231 Difference]: Finished difference. Result has 68 places, 70 transitions, 230 flow [2023-08-30 23:05:27,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=230, PETRI_PLACES=68, PETRI_TRANSITIONS=70} [2023-08-30 23:05:27,785 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -1 predicate places. [2023-08-30 23:05:27,786 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 70 transitions, 230 flow [2023-08-30 23:05:27,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:05:27,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:05:27,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:05:27,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 23:05:27,787 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 23:05:27,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:05:27,787 INFO L85 PathProgramCache]: Analyzing trace with hash -710619570, now seen corresponding path program 1 times [2023-08-30 23:05:27,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:05:27,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165824478] [2023-08-30 23:05:27,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:05:27,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:05:27,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:05:28,036 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 23:05:28,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:05:28,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165824478] [2023-08-30 23:05:28,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165824478] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:05:28,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:05:28,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 23:05:28,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442344423] [2023-08-30 23:05:28,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:05:28,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 23:05:28,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:05:28,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 23:05:28,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 23:05:28,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 198 [2023-08-30 23:05:28,069 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 70 transitions, 230 flow. Second operand has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:05:28,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:05:28,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 198 [2023-08-30 23:05:28,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:05:46,588 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([860] L718-->thr1Err0ASSERT_VIOLATIONERROR_FUNCTION: Formula: (not (= (mod v_~c~0_118 4294967296) 1)) InVars {~c~0=v_~c~0_118} OutVars{~c~0=v_~c~0_118} AuxVars[] AssignedVars[][131], [34#thr1Err0ASSERT_VIOLATIONERROR_FUNCTIONtrue, Black: 127#(= ~c~0 1), 74#thr1EXITtrue, thr1Thread1of4ForFork0InUse, thr1Thread2of4ForFork0InUse, 131#true, thr1Thread3of4ForFork0InUse, 56#L719true, 22#L716-2true, thr1Thread4of4ForFork0InUse, 54#L719true, 125#true]) [2023-08-30 23:05:46,588 INFO L383 tUnfolder$Statistics]: this new event has 49 ancestors and is cut-off event [2023-08-30 23:05:46,589 INFO L386 tUnfolder$Statistics]: existing Event has 49 ancestors and is cut-off event [2023-08-30 23:05:46,589 INFO L386 tUnfolder$Statistics]: existing Event has 49 ancestors and is cut-off event [2023-08-30 23:05:46,589 INFO L386 tUnfolder$Statistics]: existing Event has 49 ancestors and is cut-off event [2023-08-30 23:05:46,734 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([860] L718-->thr1Err0ASSERT_VIOLATIONERROR_FUNCTION: Formula: (not (= (mod v_~c~0_118 4294967296) 1)) InVars {~c~0=v_~c~0_118} OutVars{~c~0=v_~c~0_118} AuxVars[] AssignedVars[][131], [34#thr1Err0ASSERT_VIOLATIONERROR_FUNCTIONtrue, Black: 127#(= ~c~0 1), 74#thr1EXITtrue, thr1Thread1of4ForFork0InUse, 78#thr1EXITtrue, thr1Thread2of4ForFork0InUse, 131#true, thr1Thread3of4ForFork0InUse, 56#L719true, thr1Thread4of4ForFork0InUse, 54#L719true, 125#true]) [2023-08-30 23:05:46,734 INFO L383 tUnfolder$Statistics]: this new event has 50 ancestors and is cut-off event [2023-08-30 23:05:46,734 INFO L386 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2023-08-30 23:05:46,734 INFO L386 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2023-08-30 23:05:46,735 INFO L386 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2023-08-30 23:05:47,151 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([825] L719-->L716-2: Formula: (and (= |v_thr1Thread3of4ForFork0_#res#1.base_5| 0) (= v_~s~0_86 (+ v_~s~0_87 1)) (= |v_thr1Thread3of4ForFork0_#res#1.offset_5| 0)) InVars {~s~0=v_~s~0_87} OutVars{thr1Thread3of4ForFork0_#res#1.offset=|v_thr1Thread3of4ForFork0_#res#1.offset_5|, thr1Thread3of4ForFork0_#t~post5#1=|v_thr1Thread3of4ForFork0_#t~post5#1_5|, thr1Thread3of4ForFork0_#res#1.base=|v_thr1Thread3of4ForFork0_#res#1.base_5|, ~s~0=v_~s~0_86} AuxVars[] AssignedVars[thr1Thread3of4ForFork0_#res#1.offset, thr1Thread3of4ForFork0_#t~post5#1, thr1Thread3of4ForFork0_#res#1.base, ~s~0][124], [Black: 127#(= ~c~0 1), 42#L716-2true, 74#thr1EXITtrue, thr1Thread1of4ForFork0InUse, thr1Thread2of4ForFork0InUse, thr1Thread3of4ForFork0InUse, 131#true, 22#L716-2true, 56#L719true, thr1Thread4of4ForFork0InUse, 54#L719true, 125#true]) [2023-08-30 23:05:47,153 INFO L383 tUnfolder$Statistics]: this new event has 51 ancestors and is cut-off event [2023-08-30 23:05:47,153 INFO L386 tUnfolder$Statistics]: existing Event has 51 ancestors and is cut-off event [2023-08-30 23:05:47,153 INFO L386 tUnfolder$Statistics]: existing Event has 51 ancestors and is cut-off event [2023-08-30 23:05:47,153 INFO L386 tUnfolder$Statistics]: existing Event has 51 ancestors and is cut-off event [2023-08-30 23:05:47,231 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([825] L719-->L716-2: Formula: (and (= |v_thr1Thread3of4ForFork0_#res#1.base_5| 0) (= v_~s~0_86 (+ v_~s~0_87 1)) (= |v_thr1Thread3of4ForFork0_#res#1.offset_5| 0)) InVars {~s~0=v_~s~0_87} OutVars{thr1Thread3of4ForFork0_#res#1.offset=|v_thr1Thread3of4ForFork0_#res#1.offset_5|, thr1Thread3of4ForFork0_#t~post5#1=|v_thr1Thread3of4ForFork0_#t~post5#1_5|, thr1Thread3of4ForFork0_#res#1.base=|v_thr1Thread3of4ForFork0_#res#1.base_5|, ~s~0=v_~s~0_86} AuxVars[] AssignedVars[thr1Thread3of4ForFork0_#res#1.offset, thr1Thread3of4ForFork0_#t~post5#1, thr1Thread3of4ForFork0_#res#1.base, ~s~0][124], [Black: 127#(= ~c~0 1), 42#L716-2true, 74#thr1EXITtrue, thr1Thread1of4ForFork0InUse, 78#thr1EXITtrue, thr1Thread2of4ForFork0InUse, 131#true, thr1Thread3of4ForFork0InUse, 56#L719true, thr1Thread4of4ForFork0InUse, 54#L719true, 125#true]) [2023-08-30 23:05:47,231 INFO L383 tUnfolder$Statistics]: this new event has 52 ancestors and is cut-off event [2023-08-30 23:05:47,232 INFO L386 tUnfolder$Statistics]: existing Event has 52 ancestors and is cut-off event [2023-08-30 23:05:47,232 INFO L386 tUnfolder$Statistics]: existing Event has 52 ancestors and is cut-off event [2023-08-30 23:05:47,232 INFO L386 tUnfolder$Statistics]: existing Event has 52 ancestors and is cut-off event [2023-08-30 23:05:47,306 INFO L130 PetriNetUnfolder]: 214012/314249 cut-off events. [2023-08-30 23:05:47,306 INFO L131 PetriNetUnfolder]: For 64987/82854 co-relation queries the response was YES. [2023-08-30 23:05:48,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 690337 conditions, 314249 events. 214012/314249 cut-off events. For 64987/82854 co-relation queries the response was YES. Maximal size of possible extension queue 10484. Compared 2730196 event pairs, 98760 based on Foata normal form. 11371/278583 useless extension candidates. Maximal degree in co-relation 621105. Up to 229101 conditions per place. [2023-08-30 23:05:49,499 INFO L137 encePairwiseOnDemand]: 185/198 looper letters, 84 selfloop transitions, 25 changer transitions 0/137 dead transitions. [2023-08-30 23:05:49,500 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 137 transitions, 622 flow [2023-08-30 23:05:49,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 23:05:49,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 23:05:49,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 535 transitions. [2023-08-30 23:05:49,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5404040404040404 [2023-08-30 23:05:49,502 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 535 transitions. [2023-08-30 23:05:49,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 535 transitions. [2023-08-30 23:05:49,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:05:49,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 535 transitions. [2023-08-30 23:05:49,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:05:49,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 198.0) internal successors, (1188), 6 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:05:49,506 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 198.0) internal successors, (1188), 6 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:05:49,506 INFO L175 Difference]: Start difference. First operand has 68 places, 70 transitions, 230 flow. Second operand 5 states and 535 transitions. [2023-08-30 23:05:49,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 137 transitions, 622 flow [2023-08-30 23:05:49,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 137 transitions, 602 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 23:05:49,720 INFO L231 Difference]: Finished difference. Result has 72 places, 94 transitions, 357 flow [2023-08-30 23:05:49,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=357, PETRI_PLACES=72, PETRI_TRANSITIONS=94} [2023-08-30 23:05:49,721 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 3 predicate places. [2023-08-30 23:05:49,721 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 94 transitions, 357 flow [2023-08-30 23:05:49,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:05:49,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:05:49,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:05:49,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 23:05:49,722 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 23:05:49,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:05:49,723 INFO L85 PathProgramCache]: Analyzing trace with hash -722332370, now seen corresponding path program 2 times [2023-08-30 23:05:49,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:05:49,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070861758] [2023-08-30 23:05:49,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:05:49,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:05:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:05:49,895 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 23:05:49,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:05:49,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070861758] [2023-08-30 23:05:49,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070861758] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:05:49,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:05:49,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 23:05:49,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17693460] [2023-08-30 23:05:49,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:05:49,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 23:05:49,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:05:49,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 23:05:49,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 23:05:49,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 198 [2023-08-30 23:05:49,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 94 transitions, 357 flow. Second operand has 5 states, 5 states have (on average 86.0) internal successors, (430), 5 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:05:49,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:05:49,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 198 [2023-08-30 23:05:49,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:06:10,223 INFO L130 PetriNetUnfolder]: 214472/314654 cut-off events. [2023-08-30 23:06:10,224 INFO L131 PetriNetUnfolder]: For 97203/128704 co-relation queries the response was YES. [2023-08-30 23:06:11,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728407 conditions, 314654 events. 214472/314654 cut-off events. For 97203/128704 co-relation queries the response was YES. Maximal size of possible extension queue 10853. Compared 2734227 event pairs, 99127 based on Foata normal form. 11784/289398 useless extension candidates. Maximal degree in co-relation 656095. Up to 229695 conditions per place. [2023-08-30 23:06:12,484 INFO L137 encePairwiseOnDemand]: 186/198 looper letters, 91 selfloop transitions, 24 changer transitions 0/143 dead transitions. [2023-08-30 23:06:12,485 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 143 transitions, 739 flow [2023-08-30 23:06:12,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 23:06:12,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 23:06:12,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 527 transitions. [2023-08-30 23:06:12,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5323232323232323 [2023-08-30 23:06:12,487 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 527 transitions. [2023-08-30 23:06:12,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 527 transitions. [2023-08-30 23:06:12,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:06:12,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 527 transitions. [2023-08-30 23:06:12,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:06:12,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 198.0) internal successors, (1188), 6 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:06:12,492 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 198.0) internal successors, (1188), 6 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:06:12,492 INFO L175 Difference]: Start difference. First operand has 72 places, 94 transitions, 357 flow. Second operand 5 states and 527 transitions. [2023-08-30 23:06:12,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 143 transitions, 739 flow [2023-08-30 23:06:12,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 143 transitions, 739 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 23:06:12,513 INFO L231 Difference]: Finished difference. Result has 77 places, 102 transitions, 464 flow [2023-08-30 23:06:12,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=464, PETRI_PLACES=77, PETRI_TRANSITIONS=102} [2023-08-30 23:06:12,514 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 8 predicate places. [2023-08-30 23:06:12,514 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 102 transitions, 464 flow [2023-08-30 23:06:12,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 86.0) internal successors, (430), 5 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:06:12,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:06:12,514 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 23:06:12,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 23:06:12,515 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 23:06:12,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:06:12,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1755268447, now seen corresponding path program 1 times [2023-08-30 23:06:12,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:06:12,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106725067] [2023-08-30 23:06:12,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:06:12,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:06:12,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:06:12,669 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 23:06:12,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:06:12,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106725067] [2023-08-30 23:06:12,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106725067] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:06:12,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:06:12,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 23:06:12,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101236188] [2023-08-30 23:06:12,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:06:12,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 23:06:12,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:06:12,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 23:06:12,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 23:06:12,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 198 [2023-08-30 23:06:12,700 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 102 transitions, 464 flow. Second operand has 5 states, 5 states have (on average 87.2) internal successors, (436), 5 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:06:12,700 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:06:12,700 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 198 [2023-08-30 23:06:12,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:06:34,141 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([860] L718-->thr1Err0ASSERT_VIOLATIONERROR_FUNCTION: Formula: (not (= (mod v_~c~0_118 4294967296) 1)) InVars {~c~0=v_~c~0_118} OutVars{~c~0=v_~c~0_118} AuxVars[] AssignedVars[][145], [Black: 127#(= ~c~0 1), 139#true, Black: 135#(and (<= 1 (select (select |#memory_int| |thr1Thread1of4ForFork0_~#l~0#1.base|) |thr1Thread1of4ForFork0_~#l~0#1.offset|)) (< (div (select (select |#memory_int| |thr1Thread1of4ForFork0_~#l~0#1.base|) |thr1Thread1of4ForFork0_~#l~0#1.offset|) 4294967296) 1) (= ~s~0 0)), 131#true, 56#L719true, Black: 134#(and (<= ~t~0 1) (<= 1 ~t~0) (= ~s~0 0)), 54#L719true, 146#true, 34#thr1Err0ASSERT_VIOLATIONERROR_FUNCTIONtrue, Black: 143#(and (<= 1 (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|)) (< (div (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296) 1) (= ~s~0 0)), 74#thr1EXITtrue, thr1Thread1of4ForFork0InUse, thr1Thread2of4ForFork0InUse, thr1Thread3of4ForFork0InUse, 22#L716-2true, thr1Thread4of4ForFork0InUse]) [2023-08-30 23:06:34,142 INFO L383 tUnfolder$Statistics]: this new event has 49 ancestors and is cut-off event [2023-08-30 23:06:34,142 INFO L386 tUnfolder$Statistics]: existing Event has 49 ancestors and is cut-off event [2023-08-30 23:06:34,142 INFO L386 tUnfolder$Statistics]: existing Event has 49 ancestors and is cut-off event [2023-08-30 23:06:34,142 INFO L386 tUnfolder$Statistics]: existing Event has 49 ancestors and is cut-off event [2023-08-30 23:06:34,294 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([860] L718-->thr1Err0ASSERT_VIOLATIONERROR_FUNCTION: Formula: (not (= (mod v_~c~0_118 4294967296) 1)) InVars {~c~0=v_~c~0_118} OutVars{~c~0=v_~c~0_118} AuxVars[] AssignedVars[][145], [Black: 127#(= ~c~0 1), 139#true, Black: 135#(and (<= 1 (select (select |#memory_int| |thr1Thread1of4ForFork0_~#l~0#1.base|) |thr1Thread1of4ForFork0_~#l~0#1.offset|)) (< (div (select (select |#memory_int| |thr1Thread1of4ForFork0_~#l~0#1.base|) |thr1Thread1of4ForFork0_~#l~0#1.offset|) 4294967296) 1) (= ~s~0 0)), 131#true, 56#L719true, Black: 134#(and (<= ~t~0 1) (<= 1 ~t~0) (= ~s~0 0)), 54#L719true, 146#true, 34#thr1Err0ASSERT_VIOLATIONERROR_FUNCTIONtrue, Black: 143#(and (<= 1 (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|)) (< (div (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296) 1) (= ~s~0 0)), 74#thr1EXITtrue, thr1Thread1of4ForFork0InUse, 78#thr1EXITtrue, thr1Thread2of4ForFork0InUse, thr1Thread3of4ForFork0InUse, thr1Thread4of4ForFork0InUse]) [2023-08-30 23:06:34,294 INFO L383 tUnfolder$Statistics]: this new event has 50 ancestors and is cut-off event [2023-08-30 23:06:34,294 INFO L386 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2023-08-30 23:06:34,294 INFO L386 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2023-08-30 23:06:34,294 INFO L386 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2023-08-30 23:06:34,401 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([825] L719-->L716-2: Formula: (and (= |v_thr1Thread3of4ForFork0_#res#1.base_5| 0) (= v_~s~0_86 (+ v_~s~0_87 1)) (= |v_thr1Thread3of4ForFork0_#res#1.offset_5| 0)) InVars {~s~0=v_~s~0_87} OutVars{thr1Thread3of4ForFork0_#res#1.offset=|v_thr1Thread3of4ForFork0_#res#1.offset_5|, thr1Thread3of4ForFork0_#t~post5#1=|v_thr1Thread3of4ForFork0_#t~post5#1_5|, thr1Thread3of4ForFork0_#res#1.base=|v_thr1Thread3of4ForFork0_#res#1.base_5|, ~s~0=v_~s~0_86} AuxVars[] AssignedVars[thr1Thread3of4ForFork0_#res#1.offset, thr1Thread3of4ForFork0_#t~post5#1, thr1Thread3of4ForFork0_#res#1.base, ~s~0][130], [Black: 127#(= ~c~0 1), 139#true, 42#L716-2true, Black: 135#(and (<= 1 (select (select |#memory_int| |thr1Thread1of4ForFork0_~#l~0#1.base|) |thr1Thread1of4ForFork0_~#l~0#1.offset|)) (< (div (select (select |#memory_int| |thr1Thread1of4ForFork0_~#l~0#1.base|) |thr1Thread1of4ForFork0_~#l~0#1.offset|) 4294967296) 1) (= ~s~0 0)), 131#true, Black: 134#(and (<= ~t~0 1) (<= 1 ~t~0) (= ~s~0 0)), 56#L719true, 54#L719true, 146#true, Black: 143#(and (<= 1 (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|)) (< (div (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296) 1) (= ~s~0 0)), 74#thr1EXITtrue, thr1Thread1of4ForFork0InUse, thr1Thread2of4ForFork0InUse, thr1Thread3of4ForFork0InUse, 22#L716-2true, thr1Thread4of4ForFork0InUse]) [2023-08-30 23:06:34,402 INFO L383 tUnfolder$Statistics]: this new event has 51 ancestors and is cut-off event [2023-08-30 23:06:34,402 INFO L386 tUnfolder$Statistics]: existing Event has 51 ancestors and is cut-off event [2023-08-30 23:06:34,402 INFO L386 tUnfolder$Statistics]: existing Event has 51 ancestors and is cut-off event [2023-08-30 23:06:34,402 INFO L386 tUnfolder$Statistics]: existing Event has 51 ancestors and is cut-off event [2023-08-30 23:06:34,462 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([825] L719-->L716-2: Formula: (and (= |v_thr1Thread3of4ForFork0_#res#1.base_5| 0) (= v_~s~0_86 (+ v_~s~0_87 1)) (= |v_thr1Thread3of4ForFork0_#res#1.offset_5| 0)) InVars {~s~0=v_~s~0_87} OutVars{thr1Thread3of4ForFork0_#res#1.offset=|v_thr1Thread3of4ForFork0_#res#1.offset_5|, thr1Thread3of4ForFork0_#t~post5#1=|v_thr1Thread3of4ForFork0_#t~post5#1_5|, thr1Thread3of4ForFork0_#res#1.base=|v_thr1Thread3of4ForFork0_#res#1.base_5|, ~s~0=v_~s~0_86} AuxVars[] AssignedVars[thr1Thread3of4ForFork0_#res#1.offset, thr1Thread3of4ForFork0_#t~post5#1, thr1Thread3of4ForFork0_#res#1.base, ~s~0][130], [Black: 127#(= ~c~0 1), 139#true, 42#L716-2true, Black: 135#(and (<= 1 (select (select |#memory_int| |thr1Thread1of4ForFork0_~#l~0#1.base|) |thr1Thread1of4ForFork0_~#l~0#1.offset|)) (< (div (select (select |#memory_int| |thr1Thread1of4ForFork0_~#l~0#1.base|) |thr1Thread1of4ForFork0_~#l~0#1.offset|) 4294967296) 1) (= ~s~0 0)), 131#true, 56#L719true, Black: 134#(and (<= ~t~0 1) (<= 1 ~t~0) (= ~s~0 0)), 54#L719true, 146#true, Black: 143#(and (<= 1 (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|)) (< (div (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296) 1) (= ~s~0 0)), 74#thr1EXITtrue, thr1Thread1of4ForFork0InUse, thr1Thread2of4ForFork0InUse, 78#thr1EXITtrue, thr1Thread3of4ForFork0InUse, thr1Thread4of4ForFork0InUse]) [2023-08-30 23:06:34,462 INFO L383 tUnfolder$Statistics]: this new event has 52 ancestors and is cut-off event [2023-08-30 23:06:34,462 INFO L386 tUnfolder$Statistics]: existing Event has 52 ancestors and is cut-off event [2023-08-30 23:06:34,462 INFO L386 tUnfolder$Statistics]: existing Event has 52 ancestors and is cut-off event [2023-08-30 23:06:34,462 INFO L386 tUnfolder$Statistics]: existing Event has 52 ancestors and is cut-off event [2023-08-30 23:06:34,835 INFO L130 PetriNetUnfolder]: 214920/316110 cut-off events. [2023-08-30 23:06:34,835 INFO L131 PetriNetUnfolder]: For 191155/234750 co-relation queries the response was YES. [2023-08-30 23:06:35,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 789285 conditions, 316110 events. 214920/316110 cut-off events. For 191155/234750 co-relation queries the response was YES. Maximal size of possible extension queue 11066. Compared 2761820 event pairs, 98036 based on Foata normal form. 11030/295118 useless extension candidates. Maximal degree in co-relation 712359. Up to 227292 conditions per place. [2023-08-30 23:06:37,178 INFO L137 encePairwiseOnDemand]: 185/198 looper letters, 101 selfloop transitions, 25 changer transitions 0/154 dead transitions. [2023-08-30 23:06:37,179 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 154 transitions, 902 flow [2023-08-30 23:06:37,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 23:06:37,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 23:06:37,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 535 transitions. [2023-08-30 23:06:37,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5404040404040404 [2023-08-30 23:06:37,182 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 535 transitions. [2023-08-30 23:06:37,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 535 transitions. [2023-08-30 23:06:37,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:06:37,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 535 transitions. [2023-08-30 23:06:37,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:06:37,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 198.0) internal successors, (1188), 6 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:06:37,187 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 198.0) internal successors, (1188), 6 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:06:37,187 INFO L175 Difference]: Start difference. First operand has 77 places, 102 transitions, 464 flow. Second operand 5 states and 535 transitions. [2023-08-30 23:06:37,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 154 transitions, 902 flow [2023-08-30 23:06:37,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 154 transitions, 847 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-30 23:06:37,245 INFO L231 Difference]: Finished difference. Result has 79 places, 111 transitions, 537 flow [2023-08-30 23:06:37,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=537, PETRI_PLACES=79, PETRI_TRANSITIONS=111} [2023-08-30 23:06:37,245 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 10 predicate places. [2023-08-30 23:06:37,245 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 111 transitions, 537 flow [2023-08-30 23:06:37,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.2) internal successors, (436), 5 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:06:37,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:06:37,246 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 23:06:37,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 23:06:37,247 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 23:06:37,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:06:37,247 INFO L85 PathProgramCache]: Analyzing trace with hash -925350526, now seen corresponding path program 1 times [2023-08-30 23:06:37,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:06:37,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028290222] [2023-08-30 23:06:37,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:06:37,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:06:37,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:06:37,268 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 23:06:37,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:06:37,293 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 23:06:37,293 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 23:06:37,293 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 23:06:37,294 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-08-30 23:06:37,294 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-08-30 23:06:37,294 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-08-30 23:06:37,294 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-08-30 23:06:37,294 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-08-30 23:06:37,294 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-08-30 23:06:37,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 23:06:37,295 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2023-08-30 23:06:37,296 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 23:06:37,296 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-30 23:06:37,322 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:06:37,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 142 transitions, 329 flow [2023-08-30 23:06:37,349 INFO L130 PetriNetUnfolder]: 28/330 cut-off events. [2023-08-30 23:06:37,350 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 23:06:37,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 330 events. 28/330 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1028 event pairs, 0 based on Foata normal form. 0/285 useless extension candidates. Maximal degree in co-relation 287. Up to 12 conditions per place. [2023-08-30 23:06:37,351 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 142 transitions, 329 flow [2023-08-30 23:06:37,353 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 142 transitions, 329 flow [2023-08-30 23:06:37,353 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:06:37,353 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 140 places, 142 transitions, 329 flow [2023-08-30 23:06:37,353 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 140 places, 142 transitions, 329 flow [2023-08-30 23:06:37,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 142 transitions, 329 flow [2023-08-30 23:06:37,376 INFO L130 PetriNetUnfolder]: 28/330 cut-off events. [2023-08-30 23:06:37,377 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 23:06:37,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 330 events. 28/330 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1028 event pairs, 0 based on Foata normal form. 0/285 useless extension candidates. Maximal degree in co-relation 287. Up to 12 conditions per place. [2023-08-30 23:06:37,388 INFO L119 LiptonReduction]: Number of co-enabled transitions 12750 [2023-08-30 23:06:38,669 INFO L134 LiptonReduction]: Checked pairs total: 53630 [2023-08-30 23:06:38,669 INFO L136 LiptonReduction]: Total number of compositions: 82 [2023-08-30 23:06:38,671 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:06:38,671 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;@eba83be, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:06:38,671 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-30 23:06:38,673 INFO L130 PetriNetUnfolder]: 3/19 cut-off events. [2023-08-30 23:06:38,673 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 23:06:38,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:06:38,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 23:06:38,673 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-08-30 23:06:38,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:06:38,674 INFO L85 PathProgramCache]: Analyzing trace with hash 246127397, now seen corresponding path program 1 times [2023-08-30 23:06:38,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:06:38,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571514683] [2023-08-30 23:06:38,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:06:38,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:06:38,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:06:38,710 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 23:06:38,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:06:38,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571514683] [2023-08-30 23:06:38,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571514683] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:06:38,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:06:38,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:06:38,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25595015] [2023-08-30 23:06:38,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:06:38,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:06:38,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:06:38,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:06:38,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:06:38,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 224 [2023-08-30 23:06:38,741 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 83 transitions, 211 flow. Second operand has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:06:38,742 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:06:38,742 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 224 [2023-08-30 23:06:38,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand