./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-lit/sssc12.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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 ../sv-benchmarks/c/pthread-lit/sssc12.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3f447624cefe078f3d1dfeed3af04dfcf2078828fba23b82e0579b17d6eb7f02 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:12:36,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:12:36,686 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:12:36,718 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:12:36,720 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:12:36,722 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:12:36,727 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:12:36,730 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:12:36,731 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:12:36,737 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:12:36,738 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:12:36,739 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:12:36,740 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:12:36,741 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:12:36,742 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:12:36,745 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:12:36,746 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:12:36,747 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:12:36,749 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:12:36,753 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:12:36,757 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:12:36,759 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:12:36,759 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:12:36,760 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:12:36,762 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:12:36,764 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:12:36,765 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:12:36,766 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:12:36,767 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:12:36,767 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:12:36,768 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:12:36,768 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:12:36,770 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:12:36,771 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:12:36,771 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:12:36,772 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:12:36,772 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:12:36,773 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:12:36,773 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:12:36,773 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:12:36,774 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:12:36,776 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:12:36,778 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:12:36,812 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:12:36,814 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:12:36,815 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:12:36,815 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:12:36,816 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:12:36,816 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:12:36,816 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:12:36,817 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:12:36,817 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:12:36,818 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:12:36,818 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:12:36,818 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:12:36,818 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:12:36,819 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:12:36,819 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:12:36,819 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:12:36,819 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:12:36,819 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:12:36,819 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:12:36,820 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:12:36,820 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:12:36,820 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:12:36,820 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:12:36,821 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:12:36,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:12:36,821 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:12:36,821 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:12:36,821 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:12:36,822 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:12:36,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:12:36,822 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:12:36,822 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:12:36,822 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:12:36,823 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f447624cefe078f3d1dfeed3af04dfcf2078828fba23b82e0579b17d6eb7f02 [2022-07-19 21:12:37,060 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:12:37,084 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:12:37,086 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:12:37,088 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:12:37,088 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:12:37,089 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-lit/sssc12.i [2022-07-19 21:12:37,154 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e5174787/51c3676998d94d7b88017f39c092e35d/FLAG469a5d8b7 [2022-07-19 21:12:37,685 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:12:37,685 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-lit/sssc12.i [2022-07-19 21:12:37,704 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e5174787/51c3676998d94d7b88017f39c092e35d/FLAG469a5d8b7 [2022-07-19 21:12:37,970 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e5174787/51c3676998d94d7b88017f39c092e35d [2022-07-19 21:12:37,972 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:12:37,973 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:12:37,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:12:37,975 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:12:37,978 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:12:37,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:12:37" (1/1) ... [2022-07-19 21:12:37,979 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20a81271 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:37, skipping insertion in model container [2022-07-19 21:12:37,979 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:12:37" (1/1) ... [2022-07-19 21:12:37,986 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:12:38,019 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:12:38,485 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-lit/sssc12.i[46865,46878] [2022-07-19 21:12:38,509 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:12:38,517 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:12:38,566 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-lit/sssc12.i[46865,46878] [2022-07-19 21:12:38,571 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:12:38,622 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:12:38,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:38 WrapperNode [2022-07-19 21:12:38,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:12:38,624 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:12:38,625 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:12:38,625 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:12:38,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:38" (1/1) ... [2022-07-19 21:12:38,646 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:38" (1/1) ... [2022-07-19 21:12:38,669 INFO L137 Inliner]: procedures = 275, calls = 23, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 82 [2022-07-19 21:12:38,671 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:12:38,673 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:12:38,673 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:12:38,673 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:12:38,679 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:38" (1/1) ... [2022-07-19 21:12:38,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:38" (1/1) ... [2022-07-19 21:12:38,689 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:38" (1/1) ... [2022-07-19 21:12:38,689 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:38" (1/1) ... [2022-07-19 21:12:38,698 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:38" (1/1) ... [2022-07-19 21:12:38,707 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:38" (1/1) ... [2022-07-19 21:12:38,709 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:38" (1/1) ... [2022-07-19 21:12:38,715 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:12:38,717 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:12:38,717 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:12:38,717 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:12:38,718 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:38" (1/1) ... [2022-07-19 21:12:38,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:12:38,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:12:38,751 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) [2022-07-19 21:12:38,755 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 [2022-07-19 21:12:38,786 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-19 21:12:38,786 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2022-07-19 21:12:38,786 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2022-07-19 21:12:38,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:12:38,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:12:38,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-19 21:12:38,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:12:38,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 21:12:38,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:12:38,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:12:38,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:12:38,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:12:38,789 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:12:38,879 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:12:38,881 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:12:39,033 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:12:39,056 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:12:39,057 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-19 21:12:39,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:12:39 BoogieIcfgContainer [2022-07-19 21:12:39,059 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:12:39,061 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:12:39,061 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:12:39,064 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:12:39,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:12:37" (1/3) ... [2022-07-19 21:12:39,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@514f7b69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:12:39, skipping insertion in model container [2022-07-19 21:12:39,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:38" (2/3) ... [2022-07-19 21:12:39,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@514f7b69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:12:39, skipping insertion in model container [2022-07-19 21:12:39,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:12:39" (3/3) ... [2022-07-19 21:12:39,067 INFO L111 eAbstractionObserver]: Analyzing ICFG sssc12.i [2022-07-19 21:12:39,072 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:12:39,082 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:12:39,082 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:12:39,082 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:12:39,129 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:12:39,182 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 79 places, 82 transitions, 169 flow [2022-07-19 21:12:39,235 INFO L129 PetriNetUnfolder]: 7/94 cut-off events. [2022-07-19 21:12:39,236 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:12:39,241 INFO L84 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 94 events. 7/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 78 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 47. Up to 4 conditions per place. [2022-07-19 21:12:39,242 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 82 transitions, 169 flow [2022-07-19 21:12:39,247 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 82 transitions, 169 flow [2022-07-19 21:12:39,265 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:12:39,273 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@32d8f4b0, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3b23983c [2022-07-19 21:12:39,274 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-19 21:12:39,319 INFO L129 PetriNetUnfolder]: 3/63 cut-off events. [2022-07-19 21:12:39,319 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:12:39,319 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:12:39,320 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:12:39,321 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:12:39,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:12:39,327 INFO L85 PathProgramCache]: Analyzing trace with hash -2038037136, now seen corresponding path program 1 times [2022-07-19 21:12:39,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:12:39,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481744225] [2022-07-19 21:12:39,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:12:39,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:12:39,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:12:39,524 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:12:39,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:12:39,608 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:12:39,610 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:12:39,611 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-07-19 21:12:39,613 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-07-19 21:12:39,614 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-07-19 21:12:39,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:12:39,615 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-19 21:12:39,618 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:12:39,618 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-19 21:12:39,656 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:12:39,663 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 111 places, 116 transitions, 244 flow [2022-07-19 21:12:39,715 INFO L129 PetriNetUnfolder]: 12/142 cut-off events. [2022-07-19 21:12:39,716 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:12:39,719 INFO L84 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 142 events. 12/142 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 253 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 95. Up to 6 conditions per place. [2022-07-19 21:12:39,719 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 116 transitions, 244 flow [2022-07-19 21:12:39,723 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 116 transitions, 244 flow [2022-07-19 21:12:39,725 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:12:39,727 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@32d8f4b0, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3b23983c [2022-07-19 21:12:39,728 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-19 21:12:39,751 INFO L129 PetriNetUnfolder]: 6/101 cut-off events. [2022-07-19 21:12:39,751 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:12:39,751 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:12:39,752 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:12:39,752 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-19 21:12:39,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:12:39,753 INFO L85 PathProgramCache]: Analyzing trace with hash 45538975, now seen corresponding path program 1 times [2022-07-19 21:12:39,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:12:39,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112462649] [2022-07-19 21:12:39,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:12:39,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:12:39,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:12:39,807 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:12:39,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:12:39,846 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:12:39,848 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:12:39,848 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-19 21:12:39,849 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-19 21:12:39,849 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-07-19 21:12:39,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-19 21:12:39,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:12:39,851 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-19 21:12:39,855 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:12:39,859 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-19 21:12:39,887 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:12:39,896 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 143 places, 150 transitions, 321 flow [2022-07-19 21:12:39,938 INFO L129 PetriNetUnfolder]: 17/190 cut-off events. [2022-07-19 21:12:39,939 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-19 21:12:39,943 INFO L84 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 190 events. 17/190 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 442 event pairs, 0 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 146. Up to 8 conditions per place. [2022-07-19 21:12:39,944 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 150 transitions, 321 flow [2022-07-19 21:12:39,948 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 150 transitions, 321 flow [2022-07-19 21:12:39,949 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:12:39,953 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@32d8f4b0, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3b23983c [2022-07-19 21:12:39,953 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-19 21:12:39,971 INFO L129 PetriNetUnfolder]: 9/134 cut-off events. [2022-07-19 21:12:39,971 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-19 21:12:39,972 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:12:39,972 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:12:39,973 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-19 21:12:39,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:12:39,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1613414299, now seen corresponding path program 1 times [2022-07-19 21:12:39,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:12:39,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864443776] [2022-07-19 21:12:39,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:12:39,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:12:40,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:12:40,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:12:40,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:12:40,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864443776] [2022-07-19 21:12:40,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864443776] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:12:40,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:12:40,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:12:40,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867617204] [2022-07-19 21:12:40,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:12:40,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:12:40,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:12:40,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:12:40,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:12:40,208 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 150 [2022-07-19 21:12:40,216 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 150 transitions, 321 flow. Second operand has 4 states, 4 states have (on average 119.25) internal successors, (477), 4 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:12:40,216 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:12:40,217 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 150 [2022-07-19 21:12:40,218 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:12:40,528 INFO L129 PetriNetUnfolder]: 372/1535 cut-off events. [2022-07-19 21:12:40,529 INFO L130 PetriNetUnfolder]: For 340/340 co-relation queries the response was YES. [2022-07-19 21:12:40,542 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2301 conditions, 1535 events. 372/1535 cut-off events. For 340/340 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 11818 event pairs, 193 based on Foata normal form. 447/1822 useless extension candidates. Maximal degree in co-relation 1582. Up to 362 conditions per place. [2022-07-19 21:12:40,554 INFO L132 encePairwiseOnDemand]: 137/150 looper letters, 32 selfloop transitions, 3 changer transitions 1/146 dead transitions. [2022-07-19 21:12:40,554 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 146 transitions, 407 flow [2022-07-19 21:12:40,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 21:12:40,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 21:12:40,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 526 transitions. [2022-07-19 21:12:40,568 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8766666666666667 [2022-07-19 21:12:40,569 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 526 transitions. [2022-07-19 21:12:40,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 526 transitions. [2022-07-19 21:12:40,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:12:40,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 526 transitions. [2022-07-19 21:12:40,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 131.5) internal successors, (526), 4 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:12:40,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 150.0) internal successors, (750), 5 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:12:40,584 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 150.0) internal successors, (750), 5 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:12:40,586 INFO L186 Difference]: Start difference. First operand has 143 places, 150 transitions, 321 flow. Second operand 4 states and 526 transitions. [2022-07-19 21:12:40,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 146 transitions, 407 flow [2022-07-19 21:12:40,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 146 transitions, 397 flow, removed 5 selfloop flow, removed 0 redundant places. [2022-07-19 21:12:40,594 INFO L242 Difference]: Finished difference. Result has 137 places, 131 transitions, 287 flow [2022-07-19 21:12:40,596 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=287, PETRI_PLACES=137, PETRI_TRANSITIONS=131} [2022-07-19 21:12:40,598 INFO L279 CegarLoopForPetriNet]: 143 programPoint places, -6 predicate places. [2022-07-19 21:12:40,599 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 131 transitions, 287 flow [2022-07-19 21:12:40,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 119.25) internal successors, (477), 4 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:12:40,600 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:12:40,600 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:12:40,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:12:40,600 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-19 21:12:40,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:12:40,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1301607399, now seen corresponding path program 1 times [2022-07-19 21:12:40,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:12:40,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381537610] [2022-07-19 21:12:40,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:12:40,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:12:40,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:12:40,623 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:12:40,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:12:40,648 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:12:40,651 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:12:40,652 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-19 21:12:40,652 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-19 21:12:40,652 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-19 21:12:40,653 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-19 21:12:40,653 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-19 21:12:40,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:12:40,654 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-19 21:12:40,654 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:12:40,655 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-19 21:12:40,694 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:12:40,701 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 175 places, 184 transitions, 400 flow [2022-07-19 21:12:40,741 INFO L129 PetriNetUnfolder]: 22/238 cut-off events. [2022-07-19 21:12:40,742 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-19 21:12:40,745 INFO L84 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 238 events. 22/238 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 638 event pairs, 0 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 198. Up to 10 conditions per place. [2022-07-19 21:12:40,745 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 184 transitions, 400 flow [2022-07-19 21:12:40,750 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 184 transitions, 400 flow [2022-07-19 21:12:40,752 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:12:40,756 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@32d8f4b0, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3b23983c [2022-07-19 21:12:40,757 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-19 21:12:40,779 INFO L129 PetriNetUnfolder]: 9/135 cut-off events. [2022-07-19 21:12:40,779 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-19 21:12:40,780 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:12:40,780 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:12:40,780 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:12:40,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:12:40,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1522313636, now seen corresponding path program 1 times [2022-07-19 21:12:40,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:12:40,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166342304] [2022-07-19 21:12:40,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:12:40,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:12:40,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:12:40,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:12:40,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:12:40,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166342304] [2022-07-19 21:12:40,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166342304] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:12:40,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:12:40,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:12:40,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361390661] [2022-07-19 21:12:40,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:12:40,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:12:40,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:12:40,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:12:40,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:12:40,888 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 184 [2022-07-19 21:12:40,889 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 184 transitions, 400 flow. Second operand has 4 states, 4 states have (on average 147.25) internal successors, (589), 4 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:12:40,890 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:12:40,890 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 184 [2022-07-19 21:12:40,890 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:12:42,191 INFO L129 PetriNetUnfolder]: 1890/7960 cut-off events. [2022-07-19 21:12:42,191 INFO L130 PetriNetUnfolder]: For 1861/1861 co-relation queries the response was YES. [2022-07-19 21:12:42,267 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11030 conditions, 7960 events. 1890/7960 cut-off events. For 1861/1861 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 87876 event pairs, 1192 based on Foata normal form. 1746/8795 useless extension candidates. Maximal degree in co-relation 3675. Up to 1452 conditions per place. [2022-07-19 21:12:42,331 INFO L132 encePairwiseOnDemand]: 169/184 looper letters, 41 selfloop transitions, 3 changer transitions 1/183 dead transitions. [2022-07-19 21:12:42,332 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 183 transitions, 528 flow [2022-07-19 21:12:42,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 21:12:42,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 21:12:42,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 653 transitions. [2022-07-19 21:12:42,334 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8872282608695652 [2022-07-19 21:12:42,334 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 653 transitions. [2022-07-19 21:12:42,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 653 transitions. [2022-07-19 21:12:42,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:12:42,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 653 transitions. [2022-07-19 21:12:42,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 163.25) internal successors, (653), 4 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:12:42,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 184.0) internal successors, (920), 5 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:12:42,341 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 184.0) internal successors, (920), 5 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:12:42,342 INFO L186 Difference]: Start difference. First operand has 175 places, 184 transitions, 400 flow. Second operand 4 states and 653 transitions. [2022-07-19 21:12:42,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 183 transitions, 528 flow [2022-07-19 21:12:42,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 183 transitions, 504 flow, removed 12 selfloop flow, removed 0 redundant places. [2022-07-19 21:12:42,354 INFO L242 Difference]: Finished difference. Result has 168 places, 162 transitions, 354 flow [2022-07-19 21:12:42,354 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=354, PETRI_PLACES=168, PETRI_TRANSITIONS=162} [2022-07-19 21:12:42,355 INFO L279 CegarLoopForPetriNet]: 175 programPoint places, -7 predicate places. [2022-07-19 21:12:42,355 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 162 transitions, 354 flow [2022-07-19 21:12:42,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 147.25) internal successors, (589), 4 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:12:42,356 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:12:42,356 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:12:42,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:12:42,357 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:12:42,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:12:42,357 INFO L85 PathProgramCache]: Analyzing trace with hash -945135595, now seen corresponding path program 1 times [2022-07-19 21:12:42,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:12:42,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616812155] [2022-07-19 21:12:42,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:12:42,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:12:42,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:12:42,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:12:42,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:12:42,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616812155] [2022-07-19 21:12:42,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616812155] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:12:42,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:12:42,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 21:12:42,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993818742] [2022-07-19 21:12:42,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:12:42,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:12:42,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:12:42,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:12:42,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:12:42,486 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 184 [2022-07-19 21:12:42,488 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 162 transitions, 354 flow. Second operand has 8 states, 8 states have (on average 119.5) internal successors, (956), 8 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:12:42,488 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:12:42,488 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 184 [2022-07-19 21:12:42,488 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:12:58,122 INFO L129 PetriNetUnfolder]: 85323/157903 cut-off events. [2022-07-19 21:12:58,123 INFO L130 PetriNetUnfolder]: For 13381/13381 co-relation queries the response was YES. [2022-07-19 21:12:59,233 INFO L84 FinitePrefix]: Finished finitePrefix Result has 287877 conditions, 157903 events. 85323/157903 cut-off events. For 13381/13381 co-relation queries the response was YES. Maximal size of possible extension queue 6052. Compared 1863193 event pairs, 7373 based on Foata normal form. 0/143627 useless extension candidates. Maximal degree in co-relation 287572. Up to 33498 conditions per place. [2022-07-19 21:13:00,548 INFO L132 encePairwiseOnDemand]: 163/184 looper letters, 273 selfloop transitions, 21 changer transitions 0/404 dead transitions. [2022-07-19 21:13:00,548 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 404 transitions, 1565 flow [2022-07-19 21:13:00,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 21:13:00,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-19 21:13:00,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1473 transitions. [2022-07-19 21:13:00,553 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8005434782608696 [2022-07-19 21:13:00,554 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1473 transitions. [2022-07-19 21:13:00,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1473 transitions. [2022-07-19 21:13:00,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:13:00,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1473 transitions. [2022-07-19 21:13:00,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 147.3) internal successors, (1473), 10 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:13:00,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 184.0) internal successors, (2024), 11 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:13:00,563 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 184.0) internal successors, (2024), 11 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:13:00,563 INFO L186 Difference]: Start difference. First operand has 168 places, 162 transitions, 354 flow. Second operand 10 states and 1473 transitions. [2022-07-19 21:13:00,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 404 transitions, 1565 flow [2022-07-19 21:13:00,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 404 transitions, 1549 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-19 21:13:00,675 INFO L242 Difference]: Finished difference. Result has 182 places, 182 transitions, 532 flow [2022-07-19 21:13:00,676 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=532, PETRI_PLACES=182, PETRI_TRANSITIONS=182} [2022-07-19 21:13:00,679 INFO L279 CegarLoopForPetriNet]: 175 programPoint places, 7 predicate places. [2022-07-19 21:13:00,679 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 182 transitions, 532 flow [2022-07-19 21:13:00,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 119.5) internal successors, (956), 8 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:13:00,680 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:13:00,681 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:13:00,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:13:00,681 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:13:00,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:13:00,682 INFO L85 PathProgramCache]: Analyzing trace with hash -165539028, now seen corresponding path program 1 times [2022-07-19 21:13:00,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:13:00,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550260183] [2022-07-19 21:13:00,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:13:00,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:13:00,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:13:00,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:13:00,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:13:00,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550260183] [2022-07-19 21:13:00,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550260183] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:13:00,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:13:00,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:13:00,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711645643] [2022-07-19 21:13:00,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:13:00,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:13:00,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:13:00,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:13:00,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:13:00,751 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 184 [2022-07-19 21:13:00,752 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 182 transitions, 532 flow. Second operand has 4 states, 4 states have (on average 147.5) internal successors, (590), 4 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:13:00,752 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:13:00,752 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 184 [2022-07-19 21:13:00,752 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:13:03,491 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([735] L1028-1-->L1026-2: Formula: (= v_~next~0_6 |v_thrThread2of4ForFork0_~end~0#1_7|) InVars {thrThread2of4ForFork0_~end~0#1=|v_thrThread2of4ForFork0_~end~0#1_7|} OutVars{~next~0=v_~next~0_6, thrThread2of4ForFork0_~end~0#1=|v_thrThread2of4ForFork0_~end~0#1_7|} AuxVars[] AssignedVars[~next~0][143], [189#(and (= |thrThread1of4ForFork0_~c~0#1| 0) (<= 10 ~len~0)), Black: 195#(and (not (= |thrThread1of4ForFork0___VERIFIER_assert_~cond#1| 0)) (not (= |thrThread1of4ForFork0___VERIFIER_assert_#in~cond#1| 0)) (= |thrThread1of4ForFork0_~c~0#1| 0) (<= 10 ~len~0)), 63#L1026-2true, Black: 193#(and (not (= |thrThread1of4ForFork0___VERIFIER_assert_#in~cond#1| 0)) (= |thrThread1of4ForFork0_~c~0#1| 0) (<= 10 ~len~0)), Black: 186#(= ~next~0 0), thrThread1of4ForFork0InUse, Black: 191#(not (= |thrThread1of4ForFork0___VERIFIER_assert_~cond#1| 0)), Black: 187#(and (<= (+ ~next~0 10) ~len~0) (= ~next~0 0)), thrThread2of4ForFork0InUse, Black: 184#true, thrThread3of4ForFork0InUse, Black: 188#(and (<= (+ ~next~0 10) ~len~0) (= ~next~0 0) (= |thrThread1of4ForFork0_~c~0#1| 0)), Black: 197#(and (not (= |thrThread1of4ForFork0___VERIFIER_assert_~cond#1| 0)) (not (= |thrThread1of4ForFork0___VERIFIER_assert_#in~cond#1| 0))), thrThread4of4ForFork0InUse, 208#true, 25#L1013true, 39#L1046-4true, Black: 181#(and (= |thrThread1of4ForFork0_~end~0#1| 0) (= |thrThread1of4ForFork0_~c~0#1| 0)), 128#L1026-2true, 92#L1028true]) [2022-07-19 21:13:03,491 INFO L384 tUnfolder$Statistics]: this new event has 98 ancestors and is cut-off event [2022-07-19 21:13:03,491 INFO L387 tUnfolder$Statistics]: existing Event has 98 ancestors and is cut-off event [2022-07-19 21:13:03,491 INFO L387 tUnfolder$Statistics]: existing Event has 98 ancestors and is cut-off event [2022-07-19 21:13:03,491 INFO L387 tUnfolder$Statistics]: existing Event has 98 ancestors and is cut-off event [2022-07-19 21:13:03,652 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([800] L1016-->L1019: Formula: (and (= v_~lock~0_29 0) (= |v_thrThread4of4ForFork0_assume_abort_if_not_#in~cond#1_3| |v_thrThread4of4ForFork0_assume_abort_if_not_~cond#1_3|) (= |v_thrThread4of4ForFork0_assume_abort_if_not_#in~cond#1_3| (ite (= v_~lock~0_30 1) 1 0)) (not (= 0 |v_thrThread4of4ForFork0_assume_abort_if_not_~cond#1_3|))) InVars {~lock~0=v_~lock~0_30} OutVars{thrThread4of4ForFork0_assume_abort_if_not_#in~cond#1=|v_thrThread4of4ForFork0_assume_abort_if_not_#in~cond#1_3|, ~lock~0=v_~lock~0_29, thrThread4of4ForFork0_assume_abort_if_not_~cond#1=|v_thrThread4of4ForFork0_assume_abort_if_not_~cond#1_3|} AuxVars[] AssignedVars[thrThread4of4ForFork0_assume_abort_if_not_#in~cond#1, ~lock~0, thrThread4of4ForFork0_assume_abort_if_not_~cond#1][167], [30#L1019true, 189#(and (= |thrThread1of4ForFork0_~c~0#1| 0) (<= 10 ~len~0)), 3#L1028-1true, Black: 195#(and (not (= |thrThread1of4ForFork0___VERIFIER_assert_~cond#1| 0)) (not (= |thrThread1of4ForFork0___VERIFIER_assert_#in~cond#1| 0)) (= |thrThread1of4ForFork0_~c~0#1| 0) (<= 10 ~len~0)), Black: 193#(and (not (= |thrThread1of4ForFork0___VERIFIER_assert_#in~cond#1| 0)) (= |thrThread1of4ForFork0_~c~0#1| 0) (<= 10 ~len~0)), Black: 186#(= ~next~0 0), thrThread1of4ForFork0InUse, Black: 191#(not (= |thrThread1of4ForFork0___VERIFIER_assert_~cond#1| 0)), Black: 187#(and (<= (+ ~next~0 10) ~len~0) (= ~next~0 0)), thrThread2of4ForFork0InUse, Black: 184#true, thrThread3of4ForFork0InUse, Black: 188#(and (<= (+ ~next~0 10) ~len~0) (= ~next~0 0) (= |thrThread1of4ForFork0_~c~0#1| 0)), Black: 197#(and (not (= |thrThread1of4ForFork0___VERIFIER_assert_~cond#1| 0)) (not (= |thrThread1of4ForFork0___VERIFIER_assert_#in~cond#1| 0))), thrThread4of4ForFork0InUse, 208#true, 25#L1013true, 39#L1046-4true, Black: 181#(and (= |thrThread1of4ForFork0_~end~0#1| 0) (= |thrThread1of4ForFork0_~c~0#1| 0)), 92#L1028true]) [2022-07-19 21:13:03,653 INFO L384 tUnfolder$Statistics]: this new event has 99 ancestors and is cut-off event [2022-07-19 21:13:03,653 INFO L387 tUnfolder$Statistics]: existing Event has 99 ancestors and is cut-off event [2022-07-19 21:13:03,653 INFO L387 tUnfolder$Statistics]: existing Event has 99 ancestors and is cut-off event [2022-07-19 21:13:03,653 INFO L387 tUnfolder$Statistics]: existing Event has 99 ancestors and is cut-off event [2022-07-19 21:13:03,806 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([735] L1028-1-->L1026-2: Formula: (= v_~next~0_6 |v_thrThread2of4ForFork0_~end~0#1_7|) InVars {thrThread2of4ForFork0_~end~0#1=|v_thrThread2of4ForFork0_~end~0#1_7|} OutVars{~next~0=v_~next~0_6, thrThread2of4ForFork0_~end~0#1=|v_thrThread2of4ForFork0_~end~0#1_7|} AuxVars[] AssignedVars[~next~0][143], [189#(and (= |thrThread1of4ForFork0_~c~0#1| 0) (<= 10 ~len~0)), 63#L1026-2true, Black: 195#(and (not (= |thrThread1of4ForFork0___VERIFIER_assert_~cond#1| 0)) (not (= |thrThread1of4ForFork0___VERIFIER_assert_#in~cond#1| 0)) (= |thrThread1of4ForFork0_~c~0#1| 0) (<= 10 ~len~0)), Black: 193#(and (not (= |thrThread1of4ForFork0___VERIFIER_assert_#in~cond#1| 0)) (= |thrThread1of4ForFork0_~c~0#1| 0) (<= 10 ~len~0)), Black: 186#(= ~next~0 0), 100#L1026-2true, thrThread1of4ForFork0InUse, Black: 191#(not (= |thrThread1of4ForFork0___VERIFIER_assert_~cond#1| 0)), Black: 187#(and (<= (+ ~next~0 10) ~len~0) (= ~next~0 0)), thrThread2of4ForFork0InUse, Black: 184#true, thrThread3of4ForFork0InUse, Black: 188#(and (<= (+ ~next~0 10) ~len~0) (= ~next~0 0) (= |thrThread1of4ForFork0_~c~0#1| 0)), Black: 197#(and (not (= |thrThread1of4ForFork0___VERIFIER_assert_~cond#1| 0)) (not (= |thrThread1of4ForFork0___VERIFIER_assert_#in~cond#1| 0))), thrThread4of4ForFork0InUse, 208#true, 25#L1013true, 39#L1046-4true, Black: 181#(and (= |thrThread1of4ForFork0_~end~0#1| 0) (= |thrThread1of4ForFork0_~c~0#1| 0)), 128#L1026-2true]) [2022-07-19 21:13:03,806 INFO L384 tUnfolder$Statistics]: this new event has 100 ancestors and is cut-off event [2022-07-19 21:13:03,806 INFO L387 tUnfolder$Statistics]: existing Event has 97 ancestors and is cut-off event [2022-07-19 21:13:03,806 INFO L387 tUnfolder$Statistics]: existing Event has 97 ancestors and is cut-off event [2022-07-19 21:13:03,806 INFO L387 tUnfolder$Statistics]: existing Event has 97 ancestors and is cut-off event [2022-07-19 21:13:05,955 INFO L129 PetriNetUnfolder]: 12614/46435 cut-off events. [2022-07-19 21:13:05,955 INFO L130 PetriNetUnfolder]: For 7857/10325 co-relation queries the response was YES. [2022-07-19 21:13:06,487 INFO L84 FinitePrefix]: Finished finitePrefix Result has 74751 conditions, 46435 events. 12614/46435 cut-off events. For 7857/10325 co-relation queries the response was YES. Maximal size of possible extension queue 2005. Compared 680615 event pairs, 6048 based on Foata normal form. 77/40847 useless extension candidates. Maximal degree in co-relation 74586. Up to 8662 conditions per place. [2022-07-19 21:13:07,002 INFO L132 encePairwiseOnDemand]: 180/184 looper letters, 41 selfloop transitions, 3 changer transitions 0/200 dead transitions. [2022-07-19 21:13:07,003 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 200 transitions, 676 flow [2022-07-19 21:13:07,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 21:13:07,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 21:13:07,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 623 transitions. [2022-07-19 21:13:07,005 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8464673913043478 [2022-07-19 21:13:07,005 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 623 transitions. [2022-07-19 21:13:07,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 623 transitions. [2022-07-19 21:13:07,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:13:07,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 623 transitions. [2022-07-19 21:13:07,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.75) internal successors, (623), 4 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:13:07,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 184.0) internal successors, (920), 5 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:13:07,010 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 184.0) internal successors, (920), 5 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:13:07,010 INFO L186 Difference]: Start difference. First operand has 182 places, 182 transitions, 532 flow. Second operand 4 states and 623 transitions. [2022-07-19 21:13:07,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 200 transitions, 676 flow [2022-07-19 21:13:07,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 200 transitions, 676 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:13:07,169 INFO L242 Difference]: Finished difference. Result has 186 places, 182 transitions, 542 flow [2022-07-19 21:13:07,169 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=542, PETRI_PLACES=186, PETRI_TRANSITIONS=182} [2022-07-19 21:13:07,170 INFO L279 CegarLoopForPetriNet]: 175 programPoint places, 11 predicate places. [2022-07-19 21:13:07,170 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 182 transitions, 542 flow [2022-07-19 21:13:07,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 147.5) internal successors, (590), 4 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:13:07,171 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:13:07,171 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:13:07,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:13:07,172 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:13:07,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:13:07,172 INFO L85 PathProgramCache]: Analyzing trace with hash -377843776, now seen corresponding path program 1 times [2022-07-19 21:13:07,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:13:07,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139322091] [2022-07-19 21:13:07,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:13:07,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:13:07,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:13:07,209 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:13:07,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:13:07,242 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:13:07,245 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:13:07,246 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-19 21:13:07,246 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-19 21:13:07,246 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-07-19 21:13:07,247 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-19 21:13:07,247 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-19 21:13:07,248 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-19 21:13:07,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 21:13:07,248 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-19 21:13:07,249 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:13:07,249 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-19 21:13:07,288 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:13:07,292 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 207 places, 218 transitions, 481 flow [2022-07-19 21:13:07,330 INFO L129 PetriNetUnfolder]: 27/286 cut-off events. [2022-07-19 21:13:07,330 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-19 21:13:07,335 INFO L84 FinitePrefix]: Finished finitePrefix Result has 317 conditions, 286 events. 27/286 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 834 event pairs, 0 based on Foata normal form. 0/248 useless extension candidates. Maximal degree in co-relation 251. Up to 12 conditions per place. [2022-07-19 21:13:07,336 INFO L82 GeneralOperation]: Start removeDead. Operand has 207 places, 218 transitions, 481 flow [2022-07-19 21:13:07,341 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 207 places, 218 transitions, 481 flow [2022-07-19 21:13:07,344 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:13:07,345 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@32d8f4b0, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3b23983c [2022-07-19 21:13:07,345 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-19 21:13:07,354 INFO L129 PetriNetUnfolder]: 9/135 cut-off events. [2022-07-19 21:13:07,355 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-19 21:13:07,355 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:13:07,355 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:13:07,355 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-19 21:13:07,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:13:07,356 INFO L85 PathProgramCache]: Analyzing trace with hash -875921481, now seen corresponding path program 1 times [2022-07-19 21:13:07,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:13:07,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096622961] [2022-07-19 21:13:07,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:13:07,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:13:07,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:13:07,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:13:07,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:13:07,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096622961] [2022-07-19 21:13:07,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096622961] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:13:07,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:13:07,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:13:07,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320902598] [2022-07-19 21:13:07,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:13:07,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:13:07,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:13:07,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:13:07,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:13:07,412 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 218 [2022-07-19 21:13:07,413 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 218 transitions, 481 flow. Second operand has 4 states, 4 states have (on average 175.25) internal successors, (701), 4 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:13:07,414 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:13:07,414 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 218 [2022-07-19 21:13:07,414 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:13:09,943 INFO L129 PetriNetUnfolder]: 6825/22512 cut-off events. [2022-07-19 21:13:09,944 INFO L130 PetriNetUnfolder]: For 8687/8687 co-relation queries the response was YES. [2022-07-19 21:13:10,114 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33877 conditions, 22512 events. 6825/22512 cut-off events. For 8687/8687 co-relation queries the response was YES. Maximal size of possible extension queue 744. Compared 273603 event pairs, 3732 based on Foata normal form. 6699/26927 useless extension candidates. Maximal degree in co-relation 20926. Up to 5401 conditions per place. [2022-07-19 21:13:10,230 INFO L132 encePairwiseOnDemand]: 201/218 looper letters, 50 selfloop transitions, 3 changer transitions 1/220 dead transitions. [2022-07-19 21:13:10,230 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 220 transitions, 655 flow [2022-07-19 21:13:10,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 21:13:10,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 21:13:10,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 780 transitions. [2022-07-19 21:13:10,232 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8944954128440367 [2022-07-19 21:13:10,232 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 780 transitions. [2022-07-19 21:13:10,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 780 transitions. [2022-07-19 21:13:10,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:13:10,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 780 transitions. [2022-07-19 21:13:10,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:13:10,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 218.0) internal successors, (1090), 5 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:13:10,236 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 218.0) internal successors, (1090), 5 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:13:10,236 INFO L186 Difference]: Start difference. First operand has 207 places, 218 transitions, 481 flow. Second operand 4 states and 780 transitions. [2022-07-19 21:13:10,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 220 transitions, 655 flow [2022-07-19 21:13:10,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 220 transitions, 611 flow, removed 22 selfloop flow, removed 0 redundant places. [2022-07-19 21:13:10,242 INFO L242 Difference]: Finished difference. Result has 199 places, 193 transitions, 421 flow [2022-07-19 21:13:10,242 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=421, PETRI_PLACES=199, PETRI_TRANSITIONS=193} [2022-07-19 21:13:10,243 INFO L279 CegarLoopForPetriNet]: 207 programPoint places, -8 predicate places. [2022-07-19 21:13:10,243 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 193 transitions, 421 flow [2022-07-19 21:13:10,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 175.25) internal successors, (701), 4 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:13:10,244 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:13:10,244 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:13:10,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 21:13:10,244 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-19 21:13:10,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:13:10,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1385448054, now seen corresponding path program 1 times [2022-07-19 21:13:10,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:13:10,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392117535] [2022-07-19 21:13:10,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:13:10,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:13:10,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:13:10,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:13:10,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:13:10,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392117535] [2022-07-19 21:13:10,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392117535] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:13:10,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:13:10,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 21:13:10,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996776800] [2022-07-19 21:13:10,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:13:10,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:13:10,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:13:10,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:13:10,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:13:10,335 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 218 [2022-07-19 21:13:10,337 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 193 transitions, 421 flow. Second operand has 8 states, 8 states have (on average 141.5) internal successors, (1132), 8 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:13:10,337 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:13:10,337 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 218 [2022-07-19 21:13:10,337 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand