./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/pthread-complex/safestack_relacy.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows 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-complex/safestack_relacy.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-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 ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1d61eb304445c3cb39dfadfa4748d680ea5f0f4958f8bc176e8bc3c77c47e674 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 05:33:03,682 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 05:33:03,683 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 05:33:03,721 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 05:33:03,721 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 05:33:03,725 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 05:33:03,728 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 05:33:03,731 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 05:33:03,733 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 05:33:03,739 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 05:33:03,741 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 05:33:03,742 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 05:33:03,742 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 05:33:03,744 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 05:33:03,746 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 05:33:03,748 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 05:33:03,751 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 05:33:03,752 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 05:33:03,754 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 05:33:03,756 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 05:33:03,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 05:33:03,766 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 05:33:03,767 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 05:33:03,768 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 05:33:03,771 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 05:33:03,773 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 05:33:03,773 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 05:33:03,775 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 05:33:03,776 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 05:33:03,777 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 05:33:03,778 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 05:33:03,779 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 05:33:03,781 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 05:33:03,782 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 05:33:03,783 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 05:33:03,783 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 05:33:03,783 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 05:33:03,784 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 05:33:03,784 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 05:33:03,785 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 05:33:03,785 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 05:33:03,787 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-09-01 05:33:03,821 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 05:33:03,822 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 05:33:03,823 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 05:33:03,823 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 05:33:03,824 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 05:33:03,824 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 05:33:03,825 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 05:33:03,825 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 05:33:03,825 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 05:33:03,826 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 05:33:03,826 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 05:33:03,827 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 05:33:03,827 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 05:33:03,827 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 05:33:03,827 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 05:33:03,827 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 05:33:03,828 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 05:33:03,828 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 05:33:03,828 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-09-01 05:33:03,828 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 05:33:03,828 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 05:33:03,829 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 05:33:03,829 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 05:33:03,829 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 05:33:03,829 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 05:33:03,829 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 05:33:03,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 05:33:03,830 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 05:33:03,830 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 05:33:03,830 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 05:33:03,830 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 05:33:03,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 05:33:03,831 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 05:33:03,831 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 05:33:03,831 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 05:33:03,832 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 05:33:03,832 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 05:33:03,832 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d61eb304445c3cb39dfadfa4748d680ea5f0f4958f8bc176e8bc3c77c47e674 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 05:33:04,161 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 05:33:04,187 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 05:33:04,189 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 05:33:04,190 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 05:33:04,190 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 05:33:04,192 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-complex/safestack_relacy.i [2023-09-01 05:33:05,391 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 05:33:05,773 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 05:33:05,773 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/safestack_relacy.i [2023-09-01 05:33:05,799 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e280d219/04ed67e4c7b249859e5b6f14911b241e/FLAG89d61a54c [2023-09-01 05:33:05,812 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e280d219/04ed67e4c7b249859e5b6f14911b241e [2023-09-01 05:33:05,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 05:33:05,817 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 05:33:05,820 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 05:33:05,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 05:33:05,823 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 05:33:05,824 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 05:33:05" (1/1) ... [2023-09-01 05:33:05,827 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c4d5ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:33:05, skipping insertion in model container [2023-09-01 05:33:05,827 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 05:33:05" (1/1) ... [2023-09-01 05:33:05,832 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 05:33:05,904 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 05:33:06,502 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-complex/safestack_relacy.i[78860,78873] [2023-09-01 05:33:06,512 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 05:33:06,522 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 05:33:06,574 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-complex/safestack_relacy.i[78860,78873] [2023-09-01 05:33:06,576 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 05:33:06,704 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 05:33:06,704 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 05:33:06,711 INFO L208 MainTranslator]: Completed translation [2023-09-01 05:33:06,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:33:06 WrapperNode [2023-09-01 05:33:06,711 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 05:33:06,713 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 05:33:06,713 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 05:33:06,713 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 05:33:06,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:33:06" (1/1) ... [2023-09-01 05:33:06,767 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:33:06" (1/1) ... [2023-09-01 05:33:06,821 INFO L138 Inliner]: procedures = 481, calls = 74, calls flagged for inlining = 19, calls inlined = 19, statements flattened = 299 [2023-09-01 05:33:06,824 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 05:33:06,825 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 05:33:06,826 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 05:33:06,826 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 05:33:06,834 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:33:06" (1/1) ... [2023-09-01 05:33:06,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:33:06" (1/1) ... [2023-09-01 05:33:06,848 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:33:06" (1/1) ... [2023-09-01 05:33:06,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:33:06" (1/1) ... [2023-09-01 05:33:06,872 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:33:06" (1/1) ... [2023-09-01 05:33:06,877 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:33:06" (1/1) ... [2023-09-01 05:33:06,881 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:33:06" (1/1) ... [2023-09-01 05:33:06,884 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:33:06" (1/1) ... [2023-09-01 05:33:06,890 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 05:33:06,891 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 05:33:06,892 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 05:33:06,892 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 05:33:06,893 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:33:06" (1/1) ... [2023-09-01 05:33:06,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 05:33:06,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 05:33:06,927 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 05:33:06,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 05:33:06,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 05:33:06,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 05:33:06,964 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 05:33:06,964 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 05:33:06,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 05:33:06,964 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2023-09-01 05:33:06,964 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2023-09-01 05:33:06,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 05:33:06,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 05:33:06,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 05:33:06,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 05:33:06,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 05:33:06,967 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 05:33:07,341 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 05:33:07,343 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 05:33:07,685 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 05:33:07,761 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 05:33:07,761 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-09-01 05:33:07,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 05:33:07 BoogieIcfgContainer [2023-09-01 05:33:07,764 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 05:33:07,767 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 05:33:07,767 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 05:33:07,769 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 05:33:07,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 05:33:05" (1/3) ... [2023-09-01 05:33:07,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5411cdd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 05:33:07, skipping insertion in model container [2023-09-01 05:33:07,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:33:06" (2/3) ... [2023-09-01 05:33:07,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5411cdd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 05:33:07, skipping insertion in model container [2023-09-01 05:33:07,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 05:33:07" (3/3) ... [2023-09-01 05:33:07,772 INFO L112 eAbstractionObserver]: Analyzing ICFG safestack_relacy.i [2023-09-01 05:33:07,779 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 05:33:07,788 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 05:33:07,788 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-09-01 05:33:07,788 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 05:33:07,901 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-09-01 05:33:07,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 261 places, 275 transitions, 558 flow [2023-09-01 05:33:08,087 INFO L130 PetriNetUnfolder]: 19/289 cut-off events. [2023-09-01 05:33:08,089 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 05:33:08,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 295 conditions, 289 events. 19/289 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 520 event pairs, 0 based on Foata normal form. 0/251 useless extension candidates. Maximal degree in co-relation 189. Up to 4 conditions per place. [2023-09-01 05:33:08,098 INFO L82 GeneralOperation]: Start removeDead. Operand has 261 places, 275 transitions, 558 flow [2023-09-01 05:33:08,106 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 245 places, 258 transitions, 521 flow [2023-09-01 05:33:08,109 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:33:08,120 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 245 places, 258 transitions, 521 flow [2023-09-01 05:33:08,124 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 245 places, 258 transitions, 521 flow [2023-09-01 05:33:08,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 245 places, 258 transitions, 521 flow [2023-09-01 05:33:08,175 INFO L130 PetriNetUnfolder]: 18/272 cut-off events. [2023-09-01 05:33:08,175 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 05:33:08,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 272 events. 18/272 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 433 event pairs, 0 based on Foata normal form. 0/244 useless extension candidates. Maximal degree in co-relation 189. Up to 4 conditions per place. [2023-09-01 05:33:08,184 INFO L119 LiptonReduction]: Number of co-enabled transitions 7968 [2023-09-01 05:33:15,732 INFO L134 LiptonReduction]: Checked pairs total: 8570 [2023-09-01 05:33:15,732 INFO L136 LiptonReduction]: Total number of compositions: 258 [2023-09-01 05:33:15,743 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:33:15,748 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;@12896e19, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:33:15,748 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:33:15,751 INFO L130 PetriNetUnfolder]: 1/18 cut-off events. [2023-09-01 05:33:15,751 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 05:33:15,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:33:15,752 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-09-01 05:33:15,752 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:33:15,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:33:15,757 INFO L85 PathProgramCache]: Analyzing trace with hash 2089319939, now seen corresponding path program 1 times [2023-09-01 05:33:15,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:33:15,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851960531] [2023-09-01 05:33:15,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:33:15,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:33:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 05:33:16,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 05:33:16,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 05:33:16,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851960531] [2023-09-01 05:33:16,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851960531] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 05:33:16,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 05:33:16,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 05:33:16,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817208219] [2023-09-01 05:33:16,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 05:33:16,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 05:33:16,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 05:33:16,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 05:33:16,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 05:33:16,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 533 [2023-09-01 05:33:16,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 41 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 243.66666666666666) internal successors, (731), 3 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:33:16,276 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 05:33:16,276 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 533 [2023-09-01 05:33:16,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 05:33:16,402 INFO L130 PetriNetUnfolder]: 147/291 cut-off events. [2023-09-01 05:33:16,403 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 05:33:16,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 587 conditions, 291 events. 147/291 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 964 event pairs, 110 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 566. Up to 290 conditions per place. [2023-09-01 05:33:16,405 INFO L137 encePairwiseOnDemand]: 527/533 looper letters, 33 selfloop transitions, 2 changer transitions 3/39 dead transitions. [2023-09-01 05:33:16,405 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 39 transitions, 159 flow [2023-09-01 05:33:16,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 05:33:16,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 05:33:16,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 768 transitions. [2023-09-01 05:33:16,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4803001876172608 [2023-09-01 05:33:16,429 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 768 transitions. [2023-09-01 05:33:16,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 768 transitions. [2023-09-01 05:33:16,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 05:33:16,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 768 transitions. [2023-09-01 05:33:16,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 256.0) internal successors, (768), 3 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:33:16,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:33:16,449 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:33:16,451 INFO L175 Difference]: Start difference. First operand has 35 places, 41 transitions, 87 flow. Second operand 3 states and 768 transitions. [2023-09-01 05:33:16,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 39 transitions, 159 flow [2023-09-01 05:33:16,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 39 transitions, 159 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 05:33:16,456 INFO L231 Difference]: Finished difference. Result has 37 places, 36 transitions, 87 flow [2023-09-01 05:33:16,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=37, PETRI_TRANSITIONS=36} [2023-09-01 05:33:16,460 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2023-09-01 05:33:16,461 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 36 transitions, 87 flow [2023-09-01 05:33:16,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 243.66666666666666) internal successors, (731), 3 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:33:16,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:33:16,462 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-09-01 05:33:16,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 05:33:16,462 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:33:16,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:33:16,463 INFO L85 PathProgramCache]: Analyzing trace with hash -757942200, now seen corresponding path program 1 times [2023-09-01 05:33:16,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:33:16,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144397528] [2023-09-01 05:33:16,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:33:16,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:33:16,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 05:33:16,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 05:33:16,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 05:33:16,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144397528] [2023-09-01 05:33:16,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144397528] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 05:33:16,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703833364] [2023-09-01 05:33:16,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:33:16,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 05:33:16,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 05:33:16,597 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 05:33:16,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 05:33:16,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 05:33:16,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 05:33:16,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 05:33:16,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 05:33:16,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 05:33:16,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 05:33:16,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703833364] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 05:33:16,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 05:33:16,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-09-01 05:33:16,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856578083] [2023-09-01 05:33:16,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 05:33:16,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 05:33:16,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 05:33:16,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 05:33:16,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-09-01 05:33:16,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 533 [2023-09-01 05:33:16,973 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 87 flow. Second operand has 8 states, 8 states have (on average 241.5) internal successors, (1932), 8 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:33:16,973 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 05:33:16,973 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 533 [2023-09-01 05:33:16,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 05:33:17,090 INFO L130 PetriNetUnfolder]: 63/138 cut-off events. [2023-09-01 05:33:17,091 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 05:33:17,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289 conditions, 138 events. 63/138 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 332 event pairs, 44 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 277. Up to 136 conditions per place. [2023-09-01 05:33:17,092 INFO L137 encePairwiseOnDemand]: 530/533 looper letters, 33 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2023-09-01 05:33:17,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 37 transitions, 163 flow [2023-09-01 05:33:17,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 05:33:17,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 05:33:17,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 997 transitions. [2023-09-01 05:33:17,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46763602251407127 [2023-09-01 05:33:17,096 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 997 transitions. [2023-09-01 05:33:17,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 997 transitions. [2023-09-01 05:33:17,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 05:33:17,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 997 transitions. [2023-09-01 05:33:17,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 249.25) internal successors, (997), 4 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:33:17,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 533.0) internal successors, (2665), 5 states have internal predecessors, (2665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:33:17,105 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 533.0) internal successors, (2665), 5 states have internal predecessors, (2665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:33:17,105 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 87 flow. Second operand 4 states and 997 transitions. [2023-09-01 05:33:17,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 37 transitions, 163 flow [2023-09-01 05:33:17,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 37 transitions, 159 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 05:33:17,107 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 99 flow [2023-09-01 05:33:17,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=99, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2023-09-01 05:33:17,108 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2023-09-01 05:33:17,108 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 99 flow [2023-09-01 05:33:17,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 241.5) internal successors, (1932), 8 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:33:17,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:33:17,109 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-09-01 05:33:17,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 05:33:17,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 05:33:17,317 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:33:17,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:33:17,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1171244707, now seen corresponding path program 2 times [2023-09-01 05:33:17,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:33:17,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023229582] [2023-09-01 05:33:17,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:33:17,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:33:17,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:33:17,352 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:33:17,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:33:17,413 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:33:17,414 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:33:17,415 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:33:17,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 05:33:17,417 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-09-01 05:33:17,421 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:33:17,422 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:33:17,422 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 05:33:17,480 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 05:33:17,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 418 places, 443 transitions, 904 flow [2023-09-01 05:33:17,575 INFO L130 PetriNetUnfolder]: 36/505 cut-off events. [2023-09-01 05:33:17,575 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 05:33:17,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 505 events. 36/505 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1646 event pairs, 0 based on Foata normal form. 0/439 useless extension candidates. Maximal degree in co-relation 372. Up to 8 conditions per place. [2023-09-01 05:33:17,582 INFO L82 GeneralOperation]: Start removeDead. Operand has 418 places, 443 transitions, 904 flow [2023-09-01 05:33:17,586 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 410 places, 435 transitions, 888 flow [2023-09-01 05:33:17,586 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:33:17,586 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 410 places, 435 transitions, 888 flow [2023-09-01 05:33:17,587 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 410 places, 435 transitions, 888 flow [2023-09-01 05:33:17,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 410 places, 435 transitions, 888 flow [2023-09-01 05:33:17,682 INFO L130 PetriNetUnfolder]: 36/497 cut-off events. [2023-09-01 05:33:17,682 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 05:33:17,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 511 conditions, 497 events. 36/497 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1610 event pairs, 0 based on Foata normal form. 0/439 useless extension candidates. Maximal degree in co-relation 372. Up to 8 conditions per place. [2023-09-01 05:33:17,719 INFO L119 LiptonReduction]: Number of co-enabled transitions 77356 [2023-09-01 05:33:27,735 INFO L134 LiptonReduction]: Checked pairs total: 83531 [2023-09-01 05:33:27,736 INFO L136 LiptonReduction]: Total number of compositions: 418 [2023-09-01 05:33:27,738 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:33:27,738 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;@12896e19, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:33:27,738 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:33:27,744 INFO L130 PetriNetUnfolder]: 6/53 cut-off events. [2023-09-01 05:33:27,744 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-09-01 05:33:27,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:33:27,744 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 05:33:27,745 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:33:27,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:33:27,745 INFO L85 PathProgramCache]: Analyzing trace with hash 10428683, now seen corresponding path program 1 times [2023-09-01 05:33:27,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:33:27,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278655382] [2023-09-01 05:33:27,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:33:27,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:33:27,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 05:33:27,893 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 05:33:27,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 05:33:27,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278655382] [2023-09-01 05:33:27,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278655382] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 05:33:27,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 05:33:27,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 05:33:27,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205526005] [2023-09-01 05:33:27,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 05:33:27,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 05:33:27,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 05:33:27,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 05:33:27,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 05:33:27,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 393 out of 861 [2023-09-01 05:33:27,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 92 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 395.0) internal successors, (1185), 3 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:33:27,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 05:33:27,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 393 of 861 [2023-09-01 05:33:27,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 05:33:29,983 INFO L130 PetriNetUnfolder]: 14527/21295 cut-off events. [2023-09-01 05:33:29,983 INFO L131 PetriNetUnfolder]: For 237/237 co-relation queries the response was YES. [2023-09-01 05:33:30,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42681 conditions, 21295 events. 14527/21295 cut-off events. For 237/237 co-relation queries the response was YES. Maximal size of possible extension queue 645. Compared 129341 event pairs, 11718 based on Foata normal form. 0/13328 useless extension candidates. Maximal degree in co-relation 35395. Up to 21228 conditions per place. [2023-09-01 05:33:30,062 INFO L137 encePairwiseOnDemand]: 852/861 looper letters, 72 selfloop transitions, 2 changer transitions 11/87 dead transitions. [2023-09-01 05:33:30,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 87 transitions, 358 flow [2023-09-01 05:33:30,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 05:33:30,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 05:33:30,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1269 transitions. [2023-09-01 05:33:30,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4912891986062718 [2023-09-01 05:33:30,070 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1269 transitions. [2023-09-01 05:33:30,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1269 transitions. [2023-09-01 05:33:30,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 05:33:30,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1269 transitions. [2023-09-01 05:33:30,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 423.0) internal successors, (1269), 3 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:33:30,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 861.0) internal successors, (3444), 4 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:33:30,081 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 861.0) internal successors, (3444), 4 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:33:30,081 INFO L175 Difference]: Start difference. First operand has 76 places, 92 transitions, 202 flow. Second operand 3 states and 1269 transitions. [2023-09-01 05:33:30,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 87 transitions, 358 flow [2023-09-01 05:33:30,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 87 transitions, 358 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 05:33:30,086 INFO L231 Difference]: Finished difference. Result has 79 places, 76 transitions, 174 flow [2023-09-01 05:33:30,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=861, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=79, PETRI_TRANSITIONS=76} [2023-09-01 05:33:30,088 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 3 predicate places. [2023-09-01 05:33:30,089 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 76 transitions, 174 flow [2023-09-01 05:33:30,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 395.0) internal successors, (1185), 3 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:33:30,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:33:30,090 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-09-01 05:33:30,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 05:33:30,091 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:33:30,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:33:30,092 INFO L85 PathProgramCache]: Analyzing trace with hash 868373450, now seen corresponding path program 1 times [2023-09-01 05:33:30,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:33:30,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756596597] [2023-09-01 05:33:30,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:33:30,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:33:30,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 05:33:30,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 05:33:30,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 05:33:30,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756596597] [2023-09-01 05:33:30,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756596597] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 05:33:30,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396577940] [2023-09-01 05:33:30,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:33:30,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 05:33:30,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 05:33:30,229 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 05:33:30,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 05:33:30,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 05:33:30,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 05:33:30,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 05:33:30,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 05:33:30,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 05:33:30,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 05:33:30,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396577940] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 05:33:30,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 05:33:30,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 05:33:30,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746165287] [2023-09-01 05:33:30,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 05:33:30,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 05:33:30,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 05:33:30,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 05:33:30,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-09-01 05:33:30,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 389 out of 861 [2023-09-01 05:33:30,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 76 transitions, 174 flow. Second operand has 7 states, 7 states have (on average 390.7142857142857) internal successors, (2735), 7 states have internal predecessors, (2735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:33:30,485 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 05:33:30,485 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 389 of 861 [2023-09-01 05:33:30,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 05:33:31,320 INFO L130 PetriNetUnfolder]: 4861/7313 cut-off events. [2023-09-01 05:33:31,321 INFO L131 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2023-09-01 05:33:31,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14723 conditions, 7313 events. 4861/7313 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 38829 event pairs, 3834 based on Foata normal form. 0/5602 useless extension candidates. Maximal degree in co-relation 14710. Up to 7301 conditions per place. [2023-09-01 05:33:31,371 INFO L137 encePairwiseOnDemand]: 858/861 looper letters, 72 selfloop transitions, 3 changer transitions 0/77 dead transitions. [2023-09-01 05:33:31,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 77 transitions, 328 flow [2023-09-01 05:33:31,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 05:33:31,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 05:33:31,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1632 transitions. [2023-09-01 05:33:31,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2023-09-01 05:33:31,378 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1632 transitions. [2023-09-01 05:33:31,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1632 transitions. [2023-09-01 05:33:31,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 05:33:31,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1632 transitions. [2023-09-01 05:33:31,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:33:31,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 861.0) internal successors, (4305), 5 states have internal predecessors, (4305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:33:31,392 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 861.0) internal successors, (4305), 5 states have internal predecessors, (4305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:33:31,392 INFO L175 Difference]: Start difference. First operand has 79 places, 76 transitions, 174 flow. Second operand 4 states and 1632 transitions. [2023-09-01 05:33:31,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 77 transitions, 328 flow [2023-09-01 05:33:31,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 77 transitions, 322 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 05:33:31,396 INFO L231 Difference]: Finished difference. Result has 73 places, 77 transitions, 184 flow [2023-09-01 05:33:31,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=861, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=184, PETRI_PLACES=73, PETRI_TRANSITIONS=77} [2023-09-01 05:33:31,398 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -3 predicate places. [2023-09-01 05:33:31,398 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 77 transitions, 184 flow [2023-09-01 05:33:31,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 390.7142857142857) internal successors, (2735), 7 states have internal predecessors, (2735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:33:31,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:33:31,401 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 05:33:31,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-09-01 05:33:31,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 05:33:31,607 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:33:31,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:33:31,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1694857451, now seen corresponding path program 2 times [2023-09-01 05:33:31,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:33:31,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459987847] [2023-09-01 05:33:31,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:33:31,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:33:31,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:33:31,641 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:33:31,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:33:31,666 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:33:31,666 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:33:31,667 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:33:31,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 05:33:31,667 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-09-01 05:33:31,668 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:33:31,668 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:33:31,668 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-09-01 05:33:31,756 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 05:33:31,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 575 places, 611 transitions, 1252 flow [2023-09-01 05:33:31,965 INFO L130 PetriNetUnfolder]: 58/756 cut-off events. [2023-09-01 05:33:31,965 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-09-01 05:33:31,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 784 conditions, 756 events. 58/756 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3286 event pairs, 1 based on Foata normal form. 0/654 useless extension candidates. Maximal degree in co-relation 574. Up to 16 conditions per place. [2023-09-01 05:33:31,987 INFO L82 GeneralOperation]: Start removeDead. Operand has 575 places, 611 transitions, 1252 flow [2023-09-01 05:33:31,994 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 567 places, 603 transitions, 1236 flow [2023-09-01 05:33:31,994 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:33:31,994 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 567 places, 603 transitions, 1236 flow [2023-09-01 05:33:31,995 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 567 places, 603 transitions, 1236 flow [2023-09-01 05:33:31,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 567 places, 603 transitions, 1236 flow [2023-09-01 05:33:32,152 INFO L130 PetriNetUnfolder]: 58/748 cut-off events. [2023-09-01 05:33:32,152 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-09-01 05:33:32,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 776 conditions, 748 events. 58/748 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3239 event pairs, 1 based on Foata normal form. 0/654 useless extension candidates. Maximal degree in co-relation 574. Up to 16 conditions per place. [2023-09-01 05:33:32,229 INFO L119 LiptonReduction]: Number of co-enabled transitions 200196 [2023-09-01 05:33:44,982 INFO L134 LiptonReduction]: Checked pairs total: 216438 [2023-09-01 05:33:44,983 INFO L136 LiptonReduction]: Total number of compositions: 585 [2023-09-01 05:33:44,989 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:33:44,989 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;@12896e19, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:33:44,989 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:33:45,002 INFO L130 PetriNetUnfolder]: 16/105 cut-off events. [2023-09-01 05:33:45,002 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-09-01 05:33:45,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:33:45,003 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 05:33:45,003 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:33:45,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:33:45,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1521173936, now seen corresponding path program 1 times [2023-09-01 05:33:45,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:33:45,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630796154] [2023-09-01 05:33:45,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:33:45,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:33:45,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 05:33:45,079 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 05:33:45,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 05:33:45,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630796154] [2023-09-01 05:33:45,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630796154] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 05:33:45,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 05:33:45,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 05:33:45,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788838973] [2023-09-01 05:33:45,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 05:33:45,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 05:33:45,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 05:33:45,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 05:33:45,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 05:33:45,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 540 out of 1196 [2023-09-01 05:33:45,118 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 128 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 542.3333333333334) internal successors, (1627), 3 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:33:45,118 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 05:33:45,118 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 540 of 1196 [2023-09-01 05:33:45,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 05:34:36,724 INFO L130 PetriNetUnfolder]: 596082/776548 cut-off events. [2023-09-01 05:34:36,725 INFO L131 PetriNetUnfolder]: For 11562/11562 co-relation queries the response was YES. [2023-09-01 05:34:38,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1557188 conditions, 776548 events. 596082/776548 cut-off events. For 11562/11562 co-relation queries the response was YES. Maximal size of possible extension queue 14165. Compared 5278139 event pairs, 480981 based on Foata normal form. 0/497466 useless extension candidates. Maximal degree in co-relation 396156. Up to 774922 conditions per place. [2023-09-01 05:34:39,346 INFO L137 encePairwiseOnDemand]: 1184/1196 looper letters, 104 selfloop transitions, 2 changer transitions 12/120 dead transitions. [2023-09-01 05:34:39,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 120 transitions, 502 flow [2023-09-01 05:34:39,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 05:34:39,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 05:34:39,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1746 transitions. [2023-09-01 05:34:39,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4866220735785953 [2023-09-01 05:34:39,351 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1746 transitions. [2023-09-01 05:34:39,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1746 transitions. [2023-09-01 05:34:39,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 05:34:39,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1746 transitions. [2023-09-01 05:34:39,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 582.0) internal successors, (1746), 3 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:34:39,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1196.0) internal successors, (4784), 4 states have internal predecessors, (4784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:34:39,364 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1196.0) internal successors, (4784), 4 states have internal predecessors, (4784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:34:39,364 INFO L175 Difference]: Start difference. First operand has 104 places, 128 transitions, 286 flow. Second operand 3 states and 1746 transitions. [2023-09-01 05:34:39,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 120 transitions, 502 flow [2023-09-01 05:34:39,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 120 transitions, 502 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 05:34:39,374 INFO L231 Difference]: Finished difference. Result has 107 places, 108 transitions, 247 flow [2023-09-01 05:34:39,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1196, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=247, PETRI_PLACES=107, PETRI_TRANSITIONS=108} [2023-09-01 05:34:39,375 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 3 predicate places. [2023-09-01 05:34:39,375 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 108 transitions, 247 flow [2023-09-01 05:34:39,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 542.3333333333334) internal successors, (1627), 3 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:34:39,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:34:39,376 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:34:39,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 05:34:39,376 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:34:39,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:34:39,377 INFO L85 PathProgramCache]: Analyzing trace with hash 946234279, now seen corresponding path program 1 times [2023-09-01 05:34:39,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:34:39,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806151135] [2023-09-01 05:34:39,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:34:39,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:34:39,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 05:34:39,461 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 05:34:39,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 05:34:39,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806151135] [2023-09-01 05:34:39,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806151135] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 05:34:39,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415149937] [2023-09-01 05:34:39,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:34:39,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 05:34:39,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 05:34:39,467 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 05:34:39,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 05:34:39,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 05:34:39,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 05:34:39,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 05:34:39,676 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 05:34:39,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 05:34:39,701 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 05:34:39,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415149937] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 05:34:39,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 05:34:39,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-09-01 05:34:39,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643497689] [2023-09-01 05:34:39,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 05:34:39,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 05:34:39,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 05:34:39,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 05:34:39,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-09-01 05:34:39,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 538 out of 1196 [2023-09-01 05:34:39,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 108 transitions, 247 flow. Second operand has 8 states, 8 states have (on average 539.75) internal successors, (4318), 8 states have internal predecessors, (4318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:34:39,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 05:34:39,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 538 of 1196 [2023-09-01 05:34:39,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 05:34:57,361 INFO L130 PetriNetUnfolder]: 202373/266102 cut-off events. [2023-09-01 05:34:57,361 INFO L131 PetriNetUnfolder]: For 4798/4798 co-relation queries the response was YES. [2023-09-01 05:34:57,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535386 conditions, 266102 events. 202373/266102 cut-off events. For 4798/4798 co-relation queries the response was YES. Maximal size of possible extension queue 4863. Compared 1650712 event pairs, 161026 based on Foata normal form. 0/197190 useless extension candidates. Maximal degree in co-relation 535372. Up to 265965 conditions per place. [2023-09-01 05:34:58,559 INFO L137 encePairwiseOnDemand]: 1193/1196 looper letters, 104 selfloop transitions, 3 changer transitions 0/109 dead transitions. [2023-09-01 05:34:58,559 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 109 transitions, 465 flow [2023-09-01 05:34:58,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 05:34:58,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 05:34:58,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2260 transitions. [2023-09-01 05:34:58,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47240802675585286 [2023-09-01 05:34:58,565 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2260 transitions. [2023-09-01 05:34:58,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2260 transitions. [2023-09-01 05:34:58,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 05:34:58,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2260 transitions. [2023-09-01 05:34:58,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 565.0) internal successors, (2260), 4 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:34:58,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1196.0) internal successors, (5980), 5 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:34:58,579 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1196.0) internal successors, (5980), 5 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:34:58,580 INFO L175 Difference]: Start difference. First operand has 107 places, 108 transitions, 247 flow. Second operand 4 states and 2260 transitions. [2023-09-01 05:34:58,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 109 transitions, 465 flow [2023-09-01 05:34:58,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 109 transitions, 455 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 05:34:58,589 INFO L231 Difference]: Finished difference. Result has 101 places, 109 transitions, 253 flow [2023-09-01 05:34:58,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1196, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=253, PETRI_PLACES=101, PETRI_TRANSITIONS=109} [2023-09-01 05:34:58,590 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, -3 predicate places. [2023-09-01 05:34:58,590 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 109 transitions, 253 flow [2023-09-01 05:34:58,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 539.75) internal successors, (4318), 8 states have internal predecessors, (4318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:34:58,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:34:58,605 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2023-09-01 05:34:58,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 05:34:58,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 05:34:58,811 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:34:58,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:34:58,812 INFO L85 PathProgramCache]: Analyzing trace with hash 126477616, now seen corresponding path program 2 times [2023-09-01 05:34:58,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:34:58,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57626379] [2023-09-01 05:34:58,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:34:58,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:34:58,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 05:34:58,923 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 05:34:58,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 05:34:58,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57626379] [2023-09-01 05:34:58,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57626379] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 05:34:58,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574943773] [2023-09-01 05:34:58,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 05:34:58,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 05:34:58,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 05:34:58,929 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 05:34:58,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 05:34:59,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 05:34:59,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 05:34:59,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 05:34:59,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 05:34:59,354 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 05:34:59,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 05:34:59,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574943773] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 05:34:59,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 05:34:59,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2023-09-01 05:34:59,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691222080] [2023-09-01 05:34:59,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 05:34:59,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 05:34:59,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 05:34:59,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 05:34:59,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-09-01 05:34:59,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 537 out of 1196 [2023-09-01 05:34:59,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 109 transitions, 253 flow. Second operand has 6 states, 6 states have (on average 539.1666666666666) internal successors, (3235), 6 states have internal predecessors, (3235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:34:59,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 05:34:59,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 537 of 1196 [2023-09-01 05:34:59,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 05:35:10,844 INFO L130 PetriNetUnfolder]: 129932/173898 cut-off events. [2023-09-01 05:35:10,844 INFO L131 PetriNetUnfolder]: For 784/784 co-relation queries the response was YES. [2023-09-01 05:35:11,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349383 conditions, 173898 events. 129932/173898 cut-off events. For 784/784 co-relation queries the response was YES. Maximal size of possible extension queue 3638. Compared 1063408 event pairs, 0 based on Foata normal form. 20412/147808 useless extension candidates. Maximal degree in co-relation 349363. Up to 92853 conditions per place. [2023-09-01 05:35:11,260 INFO L137 encePairwiseOnDemand]: 1193/1196 looper letters, 0 selfloop transitions, 0 changer transitions 307/307 dead transitions. [2023-09-01 05:35:11,261 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 307 transitions, 1259 flow [2023-09-01 05:35:11,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 05:35:11,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 05:35:11,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 3527 transitions. [2023-09-01 05:35:11,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4914994425863991 [2023-09-01 05:35:11,268 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 3527 transitions. [2023-09-01 05:35:11,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 3527 transitions. [2023-09-01 05:35:11,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 05:35:11,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 3527 transitions. [2023-09-01 05:35:11,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 587.8333333333334) internal successors, (3527), 6 states have internal predecessors, (3527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:35:11,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1196.0) internal successors, (8372), 7 states have internal predecessors, (8372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:35:11,286 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1196.0) internal successors, (8372), 7 states have internal predecessors, (8372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:35:11,287 INFO L175 Difference]: Start difference. First operand has 101 places, 109 transitions, 253 flow. Second operand 6 states and 3527 transitions. [2023-09-01 05:35:11,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 307 transitions, 1259 flow [2023-09-01 05:35:11,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 307 transitions, 1250 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-09-01 05:35:11,403 INFO L231 Difference]: Finished difference. Result has 102 places, 0 transitions, 0 flow [2023-09-01 05:35:11,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1196, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=102, PETRI_TRANSITIONS=0} [2023-09-01 05:35:11,405 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, -2 predicate places. [2023-09-01 05:35:11,405 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 0 transitions, 0 flow [2023-09-01 05:35:11,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 539.1666666666666) internal successors, (3235), 6 states have internal predecessors, (3235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:35:11,406 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:35:11,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 05:35:11,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 05:35:11,612 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-09-01 05:35:11,613 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE (1/2) [2023-09-01 05:35:11,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 575 places, 611 transitions, 1252 flow [2023-09-01 05:35:11,758 INFO L130 PetriNetUnfolder]: 58/756 cut-off events. [2023-09-01 05:35:11,759 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-09-01 05:35:11,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 784 conditions, 756 events. 58/756 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3286 event pairs, 1 based on Foata normal form. 0/654 useless extension candidates. Maximal degree in co-relation 574. Up to 16 conditions per place. [2023-09-01 05:35:11,779 INFO L82 GeneralOperation]: Start removeDead. Operand has 575 places, 611 transitions, 1252 flow [2023-09-01 05:35:11,787 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 575 places, 611 transitions, 1252 flow [2023-09-01 05:35:11,787 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:35:11,787 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 575 places, 611 transitions, 1252 flow [2023-09-01 05:35:11,787 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 575 places, 611 transitions, 1252 flow [2023-09-01 05:35:11,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 575 places, 611 transitions, 1252 flow [2023-09-01 05:35:12,086 INFO L130 PetriNetUnfolder]: 58/756 cut-off events. [2023-09-01 05:35:12,087 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-09-01 05:35:12,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 784 conditions, 756 events. 58/756 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3286 event pairs, 1 based on Foata normal form. 0/654 useless extension candidates. Maximal degree in co-relation 574. Up to 16 conditions per place. [2023-09-01 05:35:12,150 INFO L119 LiptonReduction]: Number of co-enabled transitions 200196 [2023-09-01 05:35:25,517 INFO L134 LiptonReduction]: Checked pairs total: 231244 [2023-09-01 05:35:25,517 INFO L136 LiptonReduction]: Total number of compositions: 594 [2023-09-01 05:35:25,518 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 05:35:25,519 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;@12896e19, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:35:25,519 INFO L358 AbstractCegarLoop]: Starting to check reachability of 28 error locations. [2023-09-01 05:35:25,520 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 05:35:25,520 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 05:35:25,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:35:25,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 05:35:25,520 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 25 more)] === [2023-09-01 05:35:25,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:35:25,521 INFO L85 PathProgramCache]: Analyzing trace with hash 132349, now seen corresponding path program 1 times [2023-09-01 05:35:25,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:35:25,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879246025] [2023-09-01 05:35:25,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:35:25,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:35:25,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 05:35:25,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 05:35:25,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 05:35:25,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879246025] [2023-09-01 05:35:25,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879246025] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 05:35:25,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 05:35:25,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 05:35:25,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213648301] [2023-09-01 05:35:25,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 05:35:25,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 05:35:25,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 05:35:25,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 05:35:25,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 05:35:25,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 545 out of 1205 [2023-09-01 05:35:25,578 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 137 transitions, 304 flow. Second operand has 3 states, 3 states have (on average 545.6666666666666) internal successors, (1637), 3 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:35:25,578 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 05:35:25,578 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 545 of 1205 [2023-09-01 05:35:25,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 05:36:16,421 INFO L130 PetriNetUnfolder]: 616609/803600 cut-off events. [2023-09-01 05:36:16,421 INFO L131 PetriNetUnfolder]: For 11901/11901 co-relation queries the response was YES. [2023-09-01 05:36:17,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1611405 conditions, 803600 events. 616609/803600 cut-off events. For 11901/11901 co-relation queries the response was YES. Maximal size of possible extension queue 14752. Compared 5489487 event pairs, 498749 based on Foata normal form. 0/516746 useless extension candidates. Maximal degree in co-relation 412531. Up to 801918 conditions per place. [2023-09-01 05:36:20,394 INFO L137 encePairwiseOnDemand]: 1189/1205 looper letters, 117 selfloop transitions, 1 changer transitions 0/122 dead transitions. [2023-09-01 05:36:20,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 122 transitions, 510 flow [2023-09-01 05:36:20,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 05:36:20,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 05:36:20,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1768 transitions. [2023-09-01 05:36:20,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.489073305670816 [2023-09-01 05:36:20,398 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1768 transitions. [2023-09-01 05:36:20,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1768 transitions. [2023-09-01 05:36:20,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 05:36:20,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1768 transitions. [2023-09-01 05:36:20,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 589.3333333333334) internal successors, (1768), 3 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:36:20,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1205.0) internal successors, (4820), 4 states have internal predecessors, (4820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:36:20,407 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1205.0) internal successors, (4820), 4 states have internal predecessors, (4820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:36:20,407 INFO L175 Difference]: Start difference. First operand has 113 places, 137 transitions, 304 flow. Second operand 3 states and 1768 transitions. [2023-09-01 05:36:20,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 122 transitions, 510 flow [2023-09-01 05:36:20,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 122 transitions, 510 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 05:36:20,416 INFO L231 Difference]: Finished difference. Result has 109 places, 122 transitions, 276 flow [2023-09-01 05:36:20,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1205, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=276, PETRI_PLACES=109, PETRI_TRANSITIONS=122} [2023-09-01 05:36:20,416 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -4 predicate places. [2023-09-01 05:36:20,416 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 122 transitions, 276 flow [2023-09-01 05:36:20,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 545.6666666666666) internal successors, (1637), 3 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:36:20,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:36:20,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 05:36:20,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 05:36:20,417 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 25 more)] === [2023-09-01 05:36:20,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:36:20,418 INFO L85 PathProgramCache]: Analyzing trace with hash 133816, now seen corresponding path program 1 times [2023-09-01 05:36:20,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:36:20,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994336983] [2023-09-01 05:36:20,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:36:20,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:36:20,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 05:36:20,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 05:36:20,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 05:36:20,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994336983] [2023-09-01 05:36:20,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994336983] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 05:36:20,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 05:36:20,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 05:36:20,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574518449] [2023-09-01 05:36:20,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 05:36:20,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 05:36:20,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 05:36:20,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 05:36:20,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 05:36:20,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 545 out of 1205 [2023-09-01 05:36:20,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 122 transitions, 276 flow. Second operand has 3 states, 3 states have (on average 545.6666666666666) internal successors, (1637), 3 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:36:20,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 05:36:20,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 545 of 1205 [2023-09-01 05:36:20,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 05:37:16,704 INFO L130 PetriNetUnfolder]: 616609/803599 cut-off events. [2023-09-01 05:37:16,704 INFO L131 PetriNetUnfolder]: For 11901/11901 co-relation queries the response was YES. [2023-09-01 05:37:17,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1611405 conditions, 803599 events. 616609/803599 cut-off events. For 11901/11901 co-relation queries the response was YES. Maximal size of possible extension queue 14752. Compared 5489901 event pairs, 498749 based on Foata normal form. 0/516746 useless extension candidates. Maximal degree in co-relation 1611396. Up to 801917 conditions per place. [2023-09-01 05:37:20,827 INFO L137 encePairwiseOnDemand]: 1203/1205 looper letters, 116 selfloop transitions, 1 changer transitions 0/121 dead transitions. [2023-09-01 05:37:20,828 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 121 transitions, 508 flow [2023-09-01 05:37:20,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 05:37:20,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 05:37:20,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1753 transitions. [2023-09-01 05:37:20,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48492392807745505 [2023-09-01 05:37:20,831 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1753 transitions. [2023-09-01 05:37:20,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1753 transitions. [2023-09-01 05:37:20,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 05:37:20,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1753 transitions. [2023-09-01 05:37:20,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 584.3333333333334) internal successors, (1753), 3 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:37:20,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1205.0) internal successors, (4820), 4 states have internal predecessors, (4820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:37:20,840 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1205.0) internal successors, (4820), 4 states have internal predecessors, (4820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:37:20,840 INFO L175 Difference]: Start difference. First operand has 109 places, 122 transitions, 276 flow. Second operand 3 states and 1753 transitions. [2023-09-01 05:37:20,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 121 transitions, 508 flow [2023-09-01 05:37:20,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 121 transitions, 507 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 05:37:20,846 INFO L231 Difference]: Finished difference. Result has 109 places, 121 transitions, 275 flow [2023-09-01 05:37:20,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1205, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=275, PETRI_PLACES=109, PETRI_TRANSITIONS=121} [2023-09-01 05:37:20,847 INFO L281 CegarLoopForPetriNet]: 113 programPoint places, -4 predicate places. [2023-09-01 05:37:20,847 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 121 transitions, 275 flow [2023-09-01 05:37:20,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 545.6666666666666) internal successors, (1637), 3 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:37:20,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:37:20,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 05:37:20,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 05:37:20,849 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 25 more)] === [2023-09-01 05:37:20,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:37:20,849 INFO L85 PathProgramCache]: Analyzing trace with hash 134092, now seen corresponding path program 1 times [2023-09-01 05:37:20,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:37:20,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637637610] [2023-09-01 05:37:20,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:37:20,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:37:20,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 05:37:20,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 05:37:20,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 05:37:20,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637637610] [2023-09-01 05:37:20,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637637610] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 05:37:20,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 05:37:20,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 05:37:20,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568799498] [2023-09-01 05:37:20,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 05:37:20,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 05:37:20,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 05:37:20,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 05:37:20,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 05:37:20,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 545 out of 1205 [2023-09-01 05:37:20,906 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 121 transitions, 275 flow. Second operand has 3 states, 3 states have (on average 545.6666666666666) internal successors, (1637), 3 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 05:37:20,906 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 05:37:20,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 545 of 1205 [2023-09-01 05:37:20,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand