./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_07-cond_racing2.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_07-cond_racing2.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 45d1947e02656e790dafd6ca03f6eadb14d0b370e2217b75740af9998d975bef --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 00:10:26,668 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 00:10:26,671 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 00:10:26,713 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 00:10:26,714 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 00:10:26,717 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 00:10:26,719 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 00:10:26,722 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 00:10:26,724 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 00:10:26,729 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 00:10:26,730 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 00:10:26,732 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 00:10:26,733 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 00:10:26,734 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 00:10:26,736 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 00:10:26,741 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 00:10:26,742 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 00:10:26,743 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 00:10:26,744 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 00:10:26,749 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 00:10:26,750 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 00:10:26,751 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 00:10:26,752 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 00:10:26,753 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 00:10:26,760 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 00:10:26,760 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 00:10:26,760 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 00:10:26,762 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 00:10:26,763 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 00:10:26,764 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 00:10:26,764 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 00:10:26,765 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 00:10:26,768 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 00:10:26,769 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 00:10:26,769 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 00:10:26,770 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 00:10:26,770 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 00:10:26,770 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 00:10:26,771 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 00:10:26,771 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 00:10:26,772 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 00:10:26,774 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 00:10:26,811 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 00:10:26,812 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 00:10:26,813 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 00:10:26,813 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 00:10:26,814 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 00:10:26,814 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 00:10:26,815 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 00:10:26,815 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 00:10:26,815 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 00:10:26,816 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 00:10:26,817 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 00:10:26,817 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 00:10:26,817 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 00:10:26,817 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 00:10:26,817 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 00:10:26,818 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 00:10:26,818 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 00:10:26,818 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 00:10:26,818 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 00:10:26,818 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 00:10:26,819 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 00:10:26,819 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 00:10:26,819 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 00:10:26,819 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 00:10:26,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:10:26,820 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 00:10:26,820 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 00:10:26,820 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 00:10:26,821 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 00:10:26,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 00:10:26,821 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 00:10:26,821 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 00:10:26,822 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 00:10:26,822 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 00:10:26,822 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 00:10:26,822 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45d1947e02656e790dafd6ca03f6eadb14d0b370e2217b75740af9998d975bef Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 00:10:27,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 00:10:27,154 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 00:10:27,157 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 00:10:27,159 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 00:10:27,160 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 00:10:27,161 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_07-cond_racing2.i [2023-08-31 00:10:28,500 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 00:10:28,756 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 00:10:28,761 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_07-cond_racing2.i [2023-08-31 00:10:28,798 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0679f882f/9879b2155b8a4c85b4cee63e66d9dbc3/FLAG5e319627c [2023-08-31 00:10:29,074 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0679f882f/9879b2155b8a4c85b4cee63e66d9dbc3 [2023-08-31 00:10:29,076 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 00:10:29,077 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 00:10:29,078 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 00:10:29,078 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 00:10:29,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 00:10:29,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:10:29" (1/1) ... [2023-08-31 00:10:29,083 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6706d48e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:10:29, skipping insertion in model container [2023-08-31 00:10:29,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:10:29" (1/1) ... [2023-08-31 00:10:29,089 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 00:10:29,140 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 00:10:29,477 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_07-cond_racing2.i[41322,41335] [2023-08-31 00:10:29,503 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:10:29,523 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 00:10:29,570 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_07-cond_racing2.i[41322,41335] [2023-08-31 00:10:29,590 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:10:29,664 INFO L208 MainTranslator]: Completed translation [2023-08-31 00:10:29,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:10:29 WrapperNode [2023-08-31 00:10:29,665 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 00:10:29,666 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 00:10:29,666 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 00:10:29,666 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 00:10:29,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:10:29" (1/1) ... [2023-08-31 00:10:29,704 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:10:29" (1/1) ... [2023-08-31 00:10:29,733 INFO L138 Inliner]: procedures = 270, calls = 30, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 90 [2023-08-31 00:10:29,733 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 00:10:29,734 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 00:10:29,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 00:10:29,735 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 00:10:29,743 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:10:29" (1/1) ... [2023-08-31 00:10:29,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:10:29" (1/1) ... [2023-08-31 00:10:29,762 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:10:29" (1/1) ... [2023-08-31 00:10:29,762 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:10:29" (1/1) ... [2023-08-31 00:10:29,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:10:29" (1/1) ... [2023-08-31 00:10:29,777 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:10:29" (1/1) ... [2023-08-31 00:10:29,785 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:10:29" (1/1) ... [2023-08-31 00:10:29,786 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:10:29" (1/1) ... [2023-08-31 00:10:29,787 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 00:10:29,788 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 00:10:29,788 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 00:10:29,788 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 00:10:29,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:10:29" (1/1) ... [2023-08-31 00:10:29,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:10:29,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:10:29,825 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 00:10:29,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 00:10:29,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 00:10:29,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 00:10:29,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 00:10:29,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 00:10:29,871 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-31 00:10:29,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 00:10:29,871 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-31 00:10:29,872 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-31 00:10:29,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 00:10:29,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 00:10:29,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 00:10:29,873 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 00:10:30,041 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 00:10:30,043 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 00:10:30,234 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 00:10:30,254 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 00:10:30,256 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-31 00:10:30,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:10:30 BoogieIcfgContainer [2023-08-31 00:10:30,259 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 00:10:30,261 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 00:10:30,261 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 00:10:30,264 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 00:10:30,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 12:10:29" (1/3) ... [2023-08-31 00:10:30,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39d2eef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:10:30, skipping insertion in model container [2023-08-31 00:10:30,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:10:29" (2/3) ... [2023-08-31 00:10:30,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39d2eef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:10:30, skipping insertion in model container [2023-08-31 00:10:30,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:10:30" (3/3) ... [2023-08-31 00:10:30,268 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_07-cond_racing2.i [2023-08-31 00:10:30,275 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 00:10:30,284 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 00:10:30,285 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 00:10:30,285 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 00:10:30,343 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-31 00:10:30,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 121 transitions, 250 flow [2023-08-31 00:10:30,434 INFO L130 PetriNetUnfolder]: 23/163 cut-off events. [2023-08-31 00:10:30,435 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 00:10:30,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 163 events. 23/163 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 360 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 81. Up to 6 conditions per place. [2023-08-31 00:10:30,442 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 121 transitions, 250 flow [2023-08-31 00:10:30,447 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 116 transitions, 237 flow [2023-08-31 00:10:30,451 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:10:30,460 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 116 transitions, 237 flow [2023-08-31 00:10:30,463 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 116 transitions, 237 flow [2023-08-31 00:10:30,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 116 transitions, 237 flow [2023-08-31 00:10:30,496 INFO L130 PetriNetUnfolder]: 22/158 cut-off events. [2023-08-31 00:10:30,497 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:10:30,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 158 events. 22/158 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 349 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 81. Up to 6 conditions per place. [2023-08-31 00:10:30,503 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2023-08-31 00:10:33,675 INFO L134 LiptonReduction]: Checked pairs total: 4289 [2023-08-31 00:10:33,675 INFO L136 LiptonReduction]: Total number of compositions: 103 [2023-08-31 00:10:33,688 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:10:33,694 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@722833fd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:10:33,694 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-31 00:10:33,698 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-08-31 00:10:33,698 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:10:33,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:10:33,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-31 00:10:33,700 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:10:33,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:10:33,704 INFO L85 PathProgramCache]: Analyzing trace with hash 14433895, now seen corresponding path program 1 times [2023-08-31 00:10:33,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:10:33,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662509819] [2023-08-31 00:10:33,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:10:33,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:10:33,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:10:33,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:10:33,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:10:33,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662509819] [2023-08-31 00:10:33,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662509819] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:10:33,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:10:33,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:10:33,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623038815] [2023-08-31 00:10:33,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:10:33,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:10:34,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:10:34,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:10:34,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:10:34,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 224 [2023-08-31 00:10:34,051 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 32 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:10:34,051 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:10:34,051 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 224 [2023-08-31 00:10:34,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:10:34,145 INFO L130 PetriNetUnfolder]: 97/210 cut-off events. [2023-08-31 00:10:34,146 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:10:34,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 424 conditions, 210 events. 97/210 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 739 event pairs, 70 based on Foata normal form. 12/186 useless extension candidates. Maximal degree in co-relation 409. Up to 197 conditions per place. [2023-08-31 00:10:34,148 INFO L137 encePairwiseOnDemand]: 212/224 looper letters, 22 selfloop transitions, 2 changer transitions 7/33 dead transitions. [2023-08-31 00:10:34,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 33 transitions, 133 flow [2023-08-31 00:10:34,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:10:34,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:10:34,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 356 transitions. [2023-08-31 00:10:34,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297619047619048 [2023-08-31 00:10:34,162 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 356 transitions. [2023-08-31 00:10:34,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 356 transitions. [2023-08-31 00:10:34,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:10:34,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 356 transitions. [2023-08-31 00:10:34,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:10:34,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:10:34,175 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:10:34,177 INFO L175 Difference]: Start difference. First operand has 26 places, 32 transitions, 69 flow. Second operand 3 states and 356 transitions. [2023-08-31 00:10:34,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 33 transitions, 133 flow [2023-08-31 00:10:34,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 33 transitions, 133 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:10:34,181 INFO L231 Difference]: Finished difference. Result has 29 places, 17 transitions, 47 flow [2023-08-31 00:10:34,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=29, PETRI_TRANSITIONS=17} [2023-08-31 00:10:34,185 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 3 predicate places. [2023-08-31 00:10:34,186 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 17 transitions, 47 flow [2023-08-31 00:10:34,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:10:34,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:10:34,187 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-31 00:10:34,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 00:10:34,187 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:10:34,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:10:34,188 INFO L85 PathProgramCache]: Analyzing trace with hash 950607665, now seen corresponding path program 1 times [2023-08-31 00:10:34,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:10:34,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692185559] [2023-08-31 00:10:34,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:10:34,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:10:34,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:10:34,212 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:10:34,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:10:34,250 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:10:34,254 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:10:34,258 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-31 00:10:34,260 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-31 00:10:34,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 00:10:34,265 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-31 00:10:34,269 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:10:34,269 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-31 00:10:34,287 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 00:10:34,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 151 transitions, 320 flow [2023-08-31 00:10:34,325 INFO L130 PetriNetUnfolder]: 40/259 cut-off events. [2023-08-31 00:10:34,325 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 00:10:34,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 259 events. 40/259 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 723 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 165. Up to 9 conditions per place. [2023-08-31 00:10:34,328 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 151 transitions, 320 flow [2023-08-31 00:10:34,330 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 151 transitions, 320 flow [2023-08-31 00:10:34,330 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:10:34,330 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 134 places, 151 transitions, 320 flow [2023-08-31 00:10:34,331 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 134 places, 151 transitions, 320 flow [2023-08-31 00:10:34,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 151 transitions, 320 flow [2023-08-31 00:10:34,357 INFO L130 PetriNetUnfolder]: 40/259 cut-off events. [2023-08-31 00:10:34,357 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 00:10:34,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 259 events. 40/259 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 723 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 165. Up to 9 conditions per place. [2023-08-31 00:10:34,386 INFO L119 LiptonReduction]: Number of co-enabled transitions 7560 [2023-08-31 00:10:37,407 INFO L134 LiptonReduction]: Checked pairs total: 19419 [2023-08-31 00:10:37,408 INFO L136 LiptonReduction]: Total number of compositions: 114 [2023-08-31 00:10:37,410 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:10:37,411 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@722833fd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:10:37,411 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-31 00:10:37,414 INFO L130 PetriNetUnfolder]: 2/15 cut-off events. [2023-08-31 00:10:37,414 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:10:37,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:10:37,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-31 00:10:37,415 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:10:37,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:10:37,415 INFO L85 PathProgramCache]: Analyzing trace with hash 23513882, now seen corresponding path program 1 times [2023-08-31 00:10:37,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:10:37,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54881512] [2023-08-31 00:10:37,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:10:37,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:10:37,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:10:37,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:10:37,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:10:37,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54881512] [2023-08-31 00:10:37,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54881512] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:10:37,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:10:37,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:10:37,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352553157] [2023-08-31 00:10:37,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:10:37,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:10:37,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:10:37,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:10:37,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:10:37,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 265 [2023-08-31 00:10:37,521 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 59 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:10:37,521 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:10:37,522 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 265 [2023-08-31 00:10:37,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:10:37,820 INFO L130 PetriNetUnfolder]: 1562/2747 cut-off events. [2023-08-31 00:10:37,820 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2023-08-31 00:10:37,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5327 conditions, 2747 events. 1562/2747 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 16635 event pairs, 704 based on Foata normal form. 356/2699 useless extension candidates. Maximal degree in co-relation 714. Up to 2513 conditions per place. [2023-08-31 00:10:37,830 INFO L137 encePairwiseOnDemand]: 246/265 looper letters, 28 selfloop transitions, 2 changer transitions 12/52 dead transitions. [2023-08-31 00:10:37,831 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 52 transitions, 204 flow [2023-08-31 00:10:37,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:10:37,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:10:37,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 439 transitions. [2023-08-31 00:10:37,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5522012578616352 [2023-08-31 00:10:37,834 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 439 transitions. [2023-08-31 00:10:37,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 439 transitions. [2023-08-31 00:10:37,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:10:37,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 439 transitions. [2023-08-31 00:10:37,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:10:37,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:10:37,840 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:10:37,840 INFO L175 Difference]: Start difference. First operand has 46 places, 59 transitions, 136 flow. Second operand 3 states and 439 transitions. [2023-08-31 00:10:37,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 52 transitions, 204 flow [2023-08-31 00:10:37,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 52 transitions, 204 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:10:37,842 INFO L231 Difference]: Finished difference. Result has 49 places, 33 transitions, 88 flow [2023-08-31 00:10:37,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=49, PETRI_TRANSITIONS=33} [2023-08-31 00:10:37,843 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 3 predicate places. [2023-08-31 00:10:37,844 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 33 transitions, 88 flow [2023-08-31 00:10:37,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:10:37,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:10:37,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:10:37,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 00:10:37,845 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:10:37,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:10:37,845 INFO L85 PathProgramCache]: Analyzing trace with hash -227384455, now seen corresponding path program 1 times [2023-08-31 00:10:37,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:10:37,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932924942] [2023-08-31 00:10:37,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:10:37,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:10:37,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:10:37,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 00:10:37,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:10:37,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932924942] [2023-08-31 00:10:37,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932924942] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:10:37,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:10:37,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 00:10:37,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962130421] [2023-08-31 00:10:37,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:10:37,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:10:37,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:10:37,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:10:37,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:10:37,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 265 [2023-08-31 00:10:37,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 33 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:10:37,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:10:37,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 265 [2023-08-31 00:10:37,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:10:38,126 INFO L130 PetriNetUnfolder]: 811/1458 cut-off events. [2023-08-31 00:10:38,127 INFO L131 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2023-08-31 00:10:38,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3030 conditions, 1458 events. 811/1458 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 7560 event pairs, 313 based on Foata normal form. 12/1467 useless extension candidates. Maximal degree in co-relation 2959. Up to 1218 conditions per place. [2023-08-31 00:10:38,135 INFO L137 encePairwiseOnDemand]: 261/265 looper letters, 34 selfloop transitions, 3 changer transitions 0/45 dead transitions. [2023-08-31 00:10:38,136 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 45 transitions, 198 flow [2023-08-31 00:10:38,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:10:38,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:10:38,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 408 transitions. [2023-08-31 00:10:38,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132075471698113 [2023-08-31 00:10:38,138 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 408 transitions. [2023-08-31 00:10:38,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 408 transitions. [2023-08-31 00:10:38,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:10:38,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 408 transitions. [2023-08-31 00:10:38,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:10:38,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:10:38,145 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:10:38,146 INFO L175 Difference]: Start difference. First operand has 49 places, 33 transitions, 88 flow. Second operand 3 states and 408 transitions. [2023-08-31 00:10:38,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 45 transitions, 198 flow [2023-08-31 00:10:38,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 45 transitions, 193 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 00:10:38,149 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 103 flow [2023-08-31 00:10:38,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2023-08-31 00:10:38,152 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -4 predicate places. [2023-08-31 00:10:38,152 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 103 flow [2023-08-31 00:10:38,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:10:38,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:10:38,154 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-31 00:10:38,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 00:10:38,154 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:10:38,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:10:38,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1552769436, now seen corresponding path program 1 times [2023-08-31 00:10:38,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:10:38,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031458994] [2023-08-31 00:10:38,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:10:38,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:10:38,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:10:38,176 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:10:38,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:10:38,206 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:10:38,206 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:10:38,207 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-31 00:10:38,207 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-31 00:10:38,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 00:10:38,207 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-31 00:10:38,209 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:10:38,209 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-31 00:10:38,235 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 00:10:38,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 181 transitions, 392 flow [2023-08-31 00:10:38,270 INFO L130 PetriNetUnfolder]: 62/386 cut-off events. [2023-08-31 00:10:38,270 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 00:10:38,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 386 events. 62/386 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1219 event pairs, 1 based on Foata normal form. 0/316 useless extension candidates. Maximal degree in co-relation 267. Up to 16 conditions per place. [2023-08-31 00:10:38,273 INFO L82 GeneralOperation]: Start removeDead. Operand has 159 places, 181 transitions, 392 flow [2023-08-31 00:10:38,275 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 159 places, 181 transitions, 392 flow [2023-08-31 00:10:38,276 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:10:38,276 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 159 places, 181 transitions, 392 flow [2023-08-31 00:10:38,276 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 159 places, 181 transitions, 392 flow [2023-08-31 00:10:38,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 181 transitions, 392 flow [2023-08-31 00:10:38,334 INFO L130 PetriNetUnfolder]: 62/386 cut-off events. [2023-08-31 00:10:38,334 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 00:10:38,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 386 events. 62/386 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1219 event pairs, 1 based on Foata normal form. 0/316 useless extension candidates. Maximal degree in co-relation 267. Up to 16 conditions per place. [2023-08-31 00:10:38,348 INFO L119 LiptonReduction]: Number of co-enabled transitions 13944 [2023-08-31 00:10:41,209 INFO L134 LiptonReduction]: Checked pairs total: 34795 [2023-08-31 00:10:41,209 INFO L136 LiptonReduction]: Total number of compositions: 129 [2023-08-31 00:10:41,211 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:10:41,212 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@722833fd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:10:41,212 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-31 00:10:41,214 INFO L130 PetriNetUnfolder]: 2/15 cut-off events. [2023-08-31 00:10:41,214 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:10:41,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:10:41,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-31 00:10:41,214 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:10:41,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:10:41,215 INFO L85 PathProgramCache]: Analyzing trace with hash 33981215, now seen corresponding path program 1 times [2023-08-31 00:10:41,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:10:41,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638816337] [2023-08-31 00:10:41,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:10:41,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:10:41,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:10:41,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:10:41,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:10:41,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638816337] [2023-08-31 00:10:41,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638816337] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:10:41,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:10:41,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:10:41,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514500324] [2023-08-31 00:10:41,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:10:41,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:10:41,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:10:41,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:10:41,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:10:41,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 310 [2023-08-31 00:10:41,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 78 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:10:41,259 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:10:41,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 310 [2023-08-31 00:10:41,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:10:43,601 INFO L130 PetriNetUnfolder]: 17546/26877 cut-off events. [2023-08-31 00:10:43,601 INFO L131 PetriNetUnfolder]: For 709/709 co-relation queries the response was YES. [2023-08-31 00:10:43,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52212 conditions, 26877 events. 17546/26877 cut-off events. For 709/709 co-relation queries the response was YES. Maximal size of possible extension queue 897. Compared 195571 event pairs, 14971 based on Foata normal form. 6596/30238 useless extension candidates. Maximal degree in co-relation 9920. Up to 24769 conditions per place. [2023-08-31 00:10:43,715 INFO L137 encePairwiseOnDemand]: 285/310 looper letters, 35 selfloop transitions, 2 changer transitions 13/65 dead transitions. [2023-08-31 00:10:43,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 65 transitions, 258 flow [2023-08-31 00:10:43,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:10:43,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:10:43,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 519 transitions. [2023-08-31 00:10:43,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5580645161290323 [2023-08-31 00:10:43,718 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 519 transitions. [2023-08-31 00:10:43,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 519 transitions. [2023-08-31 00:10:43,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:10:43,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 519 transitions. [2023-08-31 00:10:43,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:10:43,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:10:43,722 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:10:43,722 INFO L175 Difference]: Start difference. First operand has 60 places, 78 transitions, 186 flow. Second operand 3 states and 519 transitions. [2023-08-31 00:10:43,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 65 transitions, 258 flow [2023-08-31 00:10:43,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 65 transitions, 258 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:10:43,727 INFO L231 Difference]: Finished difference. Result has 63 places, 45 transitions, 121 flow [2023-08-31 00:10:43,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=63, PETRI_TRANSITIONS=45} [2023-08-31 00:10:43,730 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2023-08-31 00:10:43,730 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 45 transitions, 121 flow [2023-08-31 00:10:43,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:10:43,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:10:43,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:10:43,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 00:10:43,732 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:10:43,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:10:43,732 INFO L85 PathProgramCache]: Analyzing trace with hash 208662509, now seen corresponding path program 1 times [2023-08-31 00:10:43,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:10:43,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240491916] [2023-08-31 00:10:43,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:10:43,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:10:43,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:10:43,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 00:10:43,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:10:43,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240491916] [2023-08-31 00:10:43,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240491916] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:10:43,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:10:43,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 00:10:43,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894385028] [2023-08-31 00:10:43,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:10:43,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:10:43,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:10:43,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:10:43,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:10:43,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 310 [2023-08-31 00:10:43,862 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 45 transitions, 121 flow. Second operand has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:10:43,862 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:10:43,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 310 [2023-08-31 00:10:43,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:10:45,113 INFO L130 PetriNetUnfolder]: 11746/17538 cut-off events. [2023-08-31 00:10:45,113 INFO L131 PetriNetUnfolder]: For 2154/2154 co-relation queries the response was YES. [2023-08-31 00:10:45,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36196 conditions, 17538 events. 11746/17538 cut-off events. For 2154/2154 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 110407 event pairs, 5236 based on Foata normal form. 39/17549 useless extension candidates. Maximal degree in co-relation 36124. Up to 16113 conditions per place. [2023-08-31 00:10:45,228 INFO L137 encePairwiseOnDemand]: 305/310 looper letters, 46 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2023-08-31 00:10:45,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 61 transitions, 272 flow [2023-08-31 00:10:45,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:10:45,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:10:45,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 481 transitions. [2023-08-31 00:10:45,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5172043010752688 [2023-08-31 00:10:45,231 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 481 transitions. [2023-08-31 00:10:45,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 481 transitions. [2023-08-31 00:10:45,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:10:45,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 481 transitions. [2023-08-31 00:10:45,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:10:45,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:10:45,235 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:10:45,236 INFO L175 Difference]: Start difference. First operand has 63 places, 45 transitions, 121 flow. Second operand 3 states and 481 transitions. [2023-08-31 00:10:45,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 61 transitions, 272 flow [2023-08-31 00:10:45,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 61 transitions, 261 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-31 00:10:45,242 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 139 flow [2023-08-31 00:10:45,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2023-08-31 00:10:45,243 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -4 predicate places. [2023-08-31 00:10:45,244 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 139 flow [2023-08-31 00:10:45,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:10:45,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:10:45,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:10:45,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 00:10:45,245 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:10:45,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:10:45,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1102521948, now seen corresponding path program 1 times [2023-08-31 00:10:45,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:10:45,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245110855] [2023-08-31 00:10:45,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:10:45,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:10:45,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:10:45,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:10:45,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:10:45,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245110855] [2023-08-31 00:10:45,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245110855] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:10:45,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903820317] [2023-08-31 00:10:45,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:10:45,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:10:45,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:10:45,340 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:10:45,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 00:10:45,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:10:45,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 00:10:45,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:10:45,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:10:45,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:10:45,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:10:45,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903820317] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:10:45,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:10:45,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 00:10:45,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702398620] [2023-08-31 00:10:45,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:10:45,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 00:10:45,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:10:45,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 00:10:45,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 00:10:45,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 310 [2023-08-31 00:10:45,602 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 139 flow. Second operand has 7 states, 7 states have (on average 148.85714285714286) internal successors, (1042), 7 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:10:45,602 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:10:45,602 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 310 [2023-08-31 00:10:45,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:10:46,199 INFO L130 PetriNetUnfolder]: 3846/6423 cut-off events. [2023-08-31 00:10:46,200 INFO L131 PetriNetUnfolder]: For 1053/1053 co-relation queries the response was YES. [2023-08-31 00:10:46,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13681 conditions, 6423 events. 3846/6423 cut-off events. For 1053/1053 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 42405 event pairs, 525 based on Foata normal form. 619/6994 useless extension candidates. Maximal degree in co-relation 8733. Up to 3794 conditions per place. [2023-08-31 00:10:46,248 INFO L137 encePairwiseOnDemand]: 307/310 looper letters, 70 selfloop transitions, 4 changer transitions 0/91 dead transitions. [2023-08-31 00:10:46,249 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 91 transitions, 381 flow [2023-08-31 00:10:46,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:10:46,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:10:46,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 950 transitions. [2023-08-31 00:10:46,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.510752688172043 [2023-08-31 00:10:46,252 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 950 transitions. [2023-08-31 00:10:46,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 950 transitions. [2023-08-31 00:10:46,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:10:46,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 950 transitions. [2023-08-31 00:10:46,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 158.33333333333334) internal successors, (950), 6 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:10:46,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 310.0) internal successors, (2170), 7 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:10:46,259 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 310.0) internal successors, (2170), 7 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:10:46,259 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 139 flow. Second operand 6 states and 950 transitions. [2023-08-31 00:10:46,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 91 transitions, 381 flow [2023-08-31 00:10:46,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 91 transitions, 375 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 00:10:46,263 INFO L231 Difference]: Finished difference. Result has 57 places, 46 transitions, 137 flow [2023-08-31 00:10:46,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=137, PETRI_PLACES=57, PETRI_TRANSITIONS=46} [2023-08-31 00:10:46,264 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -3 predicate places. [2023-08-31 00:10:46,264 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 46 transitions, 137 flow [2023-08-31 00:10:46,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 148.85714285714286) internal successors, (1042), 7 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:10:46,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:10:46,265 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-31 00:10:46,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 00:10:46,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:10:46,472 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:10:46,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:10:46,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1306786674, now seen corresponding path program 1 times [2023-08-31 00:10:46,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:10:46,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226571894] [2023-08-31 00:10:46,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:10:46,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:10:46,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:10:46,487 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:10:46,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:10:46,501 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:10:46,502 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:10:46,502 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-31 00:10:46,502 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-31 00:10:46,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 00:10:46,503 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-31 00:10:46,503 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:10:46,503 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-31 00:10:46,527 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-31 00:10:46,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 184 places, 211 transitions, 466 flow [2023-08-31 00:10:46,598 INFO L130 PetriNetUnfolder]: 96/577 cut-off events. [2023-08-31 00:10:46,599 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-31 00:10:46,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 632 conditions, 577 events. 96/577 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2109 event pairs, 6 based on Foata normal form. 0/476 useless extension candidates. Maximal degree in co-relation 406. Up to 32 conditions per place. [2023-08-31 00:10:46,604 INFO L82 GeneralOperation]: Start removeDead. Operand has 184 places, 211 transitions, 466 flow [2023-08-31 00:10:46,608 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 184 places, 211 transitions, 466 flow [2023-08-31 00:10:46,608 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:10:46,608 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 184 places, 211 transitions, 466 flow [2023-08-31 00:10:46,609 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 184 places, 211 transitions, 466 flow [2023-08-31 00:10:46,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 184 places, 211 transitions, 466 flow [2023-08-31 00:10:46,718 INFO L130 PetriNetUnfolder]: 96/577 cut-off events. [2023-08-31 00:10:46,719 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-31 00:10:46,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 632 conditions, 577 events. 96/577 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2109 event pairs, 6 based on Foata normal form. 0/476 useless extension candidates. Maximal degree in co-relation 406. Up to 32 conditions per place. [2023-08-31 00:10:46,740 INFO L119 LiptonReduction]: Number of co-enabled transitions 22064 [2023-08-31 00:10:49,807 INFO L134 LiptonReduction]: Checked pairs total: 57997 [2023-08-31 00:10:49,807 INFO L136 LiptonReduction]: Total number of compositions: 147 [2023-08-31 00:10:49,808 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:10:49,809 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@722833fd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:10:49,809 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-31 00:10:49,811 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-08-31 00:10:49,811 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:10:49,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:10:49,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-31 00:10:49,812 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:10:49,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:10:49,812 INFO L85 PathProgramCache]: Analyzing trace with hash 45924686, now seen corresponding path program 1 times [2023-08-31 00:10:49,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:10:49,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611366192] [2023-08-31 00:10:49,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:10:49,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:10:49,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:10:49,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:10:49,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:10:49,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611366192] [2023-08-31 00:10:49,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611366192] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:10:49,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:10:49,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:10:49,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831175467] [2023-08-31 00:10:49,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:10:49,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:10:49,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:10:49,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:10:49,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:10:49,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 358 [2023-08-31 00:10:49,857 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 95 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:10:49,857 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:10:49,857 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 358 [2023-08-31 00:10:49,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:11:16,676 INFO L130 PetriNetUnfolder]: 298488/413993 cut-off events. [2023-08-31 00:11:16,676 INFO L131 PetriNetUnfolder]: For 14774/14774 co-relation queries the response was YES. [2023-08-31 00:11:17,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 810088 conditions, 413993 events. 298488/413993 cut-off events. For 14774/14774 co-relation queries the response was YES. Maximal size of possible extension queue 9173. Compared 3259963 event pairs, 214740 based on Foata normal form. 66901/448051 useless extension candidates. Maximal degree in co-relation 70928. Up to 387778 conditions per place. [2023-08-31 00:11:18,244 INFO L137 encePairwiseOnDemand]: 328/358 looper letters, 49 selfloop transitions, 2 changer transitions 13/79 dead transitions. [2023-08-31 00:11:18,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 79 transitions, 328 flow [2023-08-31 00:11:18,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:11:18,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:11:18,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 604 transitions. [2023-08-31 00:11:18,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5623836126629422 [2023-08-31 00:11:18,247 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 604 transitions. [2023-08-31 00:11:18,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 604 transitions. [2023-08-31 00:11:18,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:11:18,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 604 transitions. [2023-08-31 00:11:18,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:11:18,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:11:18,251 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:11:18,251 INFO L175 Difference]: Start difference. First operand has 73 places, 95 transitions, 234 flow. Second operand 3 states and 604 transitions. [2023-08-31 00:11:18,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 79 transitions, 328 flow [2023-08-31 00:11:18,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 79 transitions, 328 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:11:18,257 INFO L231 Difference]: Finished difference. Result has 76 places, 57 transitions, 156 flow [2023-08-31 00:11:18,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=76, PETRI_TRANSITIONS=57} [2023-08-31 00:11:18,258 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2023-08-31 00:11:18,258 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 57 transitions, 156 flow [2023-08-31 00:11:18,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:11:18,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:11:18,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:11:18,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 00:11:18,259 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:11:18,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:11:18,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1252548333, now seen corresponding path program 1 times [2023-08-31 00:11:18,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:11:18,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876211731] [2023-08-31 00:11:18,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:11:18,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:11:18,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:11:18,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 00:11:18,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:11:18,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876211731] [2023-08-31 00:11:18,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876211731] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:11:18,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:11:18,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 00:11:18,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173941970] [2023-08-31 00:11:18,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:11:18,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:11:18,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:11:18,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:11:18,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:11:18,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 358 [2023-08-31 00:11:18,324 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 57 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:11:18,324 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:11:18,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 358 [2023-08-31 00:11:18,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:11:29,543 INFO L130 PetriNetUnfolder]: 145558/197403 cut-off events. [2023-08-31 00:11:29,543 INFO L131 PetriNetUnfolder]: For 22638/22638 co-relation queries the response was YES. [2023-08-31 00:11:29,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 406007 conditions, 197403 events. 145558/197403 cut-off events. For 22638/22638 co-relation queries the response was YES. Maximal size of possible extension queue 4570. Compared 1373079 event pairs, 72898 based on Foata normal form. 120/197461 useless extension candidates. Maximal degree in co-relation 405934. Up to 187779 conditions per place. [2023-08-31 00:11:30,678 INFO L137 encePairwiseOnDemand]: 352/358 looper letters, 58 selfloop transitions, 5 changer transitions 0/77 dead transitions. [2023-08-31 00:11:30,678 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 77 transitions, 350 flow [2023-08-31 00:11:30,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:11:30,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:11:30,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 554 transitions. [2023-08-31 00:11:30,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515828677839851 [2023-08-31 00:11:30,680 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 554 transitions. [2023-08-31 00:11:30,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 554 transitions. [2023-08-31 00:11:30,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:11:30,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 554 transitions. [2023-08-31 00:11:30,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:11:30,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:11:30,686 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:11:30,686 INFO L175 Difference]: Start difference. First operand has 76 places, 57 transitions, 156 flow. Second operand 3 states and 554 transitions. [2023-08-31 00:11:30,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 77 transitions, 350 flow [2023-08-31 00:11:30,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 77 transitions, 329 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-31 00:11:30,697 INFO L231 Difference]: Finished difference. Result has 70 places, 61 transitions, 175 flow [2023-08-31 00:11:30,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=70, PETRI_TRANSITIONS=61} [2023-08-31 00:11:30,698 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -3 predicate places. [2023-08-31 00:11:30,698 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 61 transitions, 175 flow [2023-08-31 00:11:30,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:11:30,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:11:30,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:11:30,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 00:11:30,699 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:11:30,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:11:30,699 INFO L85 PathProgramCache]: Analyzing trace with hash -738651694, now seen corresponding path program 1 times [2023-08-31 00:11:30,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:11:30,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180410185] [2023-08-31 00:11:30,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:11:30,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:11:30,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:11:30,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:11:30,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:11:30,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180410185] [2023-08-31 00:11:30,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180410185] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:11:30,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231151891] [2023-08-31 00:11:30,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:11:30,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:11:30,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:11:30,765 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:11:30,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 00:11:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:11:30,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 00:11:30,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:11:30,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:11:30,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:11:30,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:11:30,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231151891] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:11:30,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:11:30,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 00:11:30,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817974463] [2023-08-31 00:11:30,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:11:30,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 00:11:30,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:11:30,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 00:11:30,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 00:11:30,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 358 [2023-08-31 00:11:30,958 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 61 transitions, 175 flow. Second operand has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:11:30,958 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:11:30,959 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 358 [2023-08-31 00:11:30,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:11:40,413 INFO L130 PetriNetUnfolder]: 123388/165483 cut-off events. [2023-08-31 00:11:40,413 INFO L131 PetriNetUnfolder]: For 21309/21309 co-relation queries the response was YES. [2023-08-31 00:11:40,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364249 conditions, 165483 events. 123388/165483 cut-off events. For 21309/21309 co-relation queries the response was YES. Maximal size of possible extension queue 4100. Compared 1142012 event pairs, 8326 based on Foata normal form. 738/166219 useless extension candidates. Maximal degree in co-relation 282508. Up to 105544 conditions per place. [2023-08-31 00:11:41,238 INFO L137 encePairwiseOnDemand]: 354/358 looper letters, 133 selfloop transitions, 6 changer transitions 0/154 dead transitions. [2023-08-31 00:11:41,238 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 154 transitions, 691 flow [2023-08-31 00:11:41,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:11:41,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:11:41,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1137 transitions. [2023-08-31 00:11:41,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5293296089385475 [2023-08-31 00:11:41,242 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1137 transitions. [2023-08-31 00:11:41,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1137 transitions. [2023-08-31 00:11:41,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:11:41,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1137 transitions. [2023-08-31 00:11:41,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 189.5) internal successors, (1137), 6 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:11:41,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 358.0) internal successors, (2506), 7 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:11:41,249 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 358.0) internal successors, (2506), 7 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:11:41,249 INFO L175 Difference]: Start difference. First operand has 70 places, 61 transitions, 175 flow. Second operand 6 states and 1137 transitions. [2023-08-31 00:11:41,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 154 transitions, 691 flow [2023-08-31 00:11:41,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 154 transitions, 676 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 00:11:41,252 INFO L231 Difference]: Finished difference. Result has 78 places, 64 transitions, 210 flow [2023-08-31 00:11:41,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=78, PETRI_TRANSITIONS=64} [2023-08-31 00:11:41,253 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 5 predicate places. [2023-08-31 00:11:41,253 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 64 transitions, 210 flow [2023-08-31 00:11:41,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:11:41,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:11:41,254 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-31 00:11:41,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 00:11:41,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-31 00:11:41,460 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:11:41,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:11:41,461 INFO L85 PathProgramCache]: Analyzing trace with hash 988704650, now seen corresponding path program 1 times [2023-08-31 00:11:41,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:11:41,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901237630] [2023-08-31 00:11:41,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:11:41,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:11:41,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:11:41,480 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:11:41,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:11:41,505 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:11:41,508 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:11:41,508 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-31 00:11:41,508 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-31 00:11:41,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-31 00:11:41,509 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-31 00:11:41,510 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:11:41,510 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-31 00:11:41,537 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-31 00:11:41,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 241 transitions, 542 flow [2023-08-31 00:11:41,637 INFO L130 PetriNetUnfolder]: 158/900 cut-off events. [2023-08-31 00:11:41,638 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-31 00:11:41,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1011 conditions, 900 events. 158/900 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3855 event pairs, 23 based on Foata normal form. 0/752 useless extension candidates. Maximal degree in co-relation 622. Up to 80 conditions per place. [2023-08-31 00:11:41,648 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 241 transitions, 542 flow [2023-08-31 00:11:41,654 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 241 transitions, 542 flow [2023-08-31 00:11:41,654 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:11:41,655 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 209 places, 241 transitions, 542 flow [2023-08-31 00:11:41,655 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 209 places, 241 transitions, 542 flow [2023-08-31 00:11:41,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 241 transitions, 542 flow [2023-08-31 00:11:41,732 INFO L130 PetriNetUnfolder]: 158/900 cut-off events. [2023-08-31 00:11:41,732 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-31 00:11:41,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1011 conditions, 900 events. 158/900 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3855 event pairs, 23 based on Foata normal form. 0/752 useless extension candidates. Maximal degree in co-relation 622. Up to 80 conditions per place. [2023-08-31 00:11:41,765 INFO L119 LiptonReduction]: Number of co-enabled transitions 31920 [2023-08-31 00:11:44,812 INFO L134 LiptonReduction]: Checked pairs total: 89022 [2023-08-31 00:11:44,812 INFO L136 LiptonReduction]: Total number of compositions: 162 [2023-08-31 00:11:44,813 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:11:44,814 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@722833fd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:11:44,814 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-31 00:11:44,815 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-08-31 00:11:44,815 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:11:44,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:11:44,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-31 00:11:44,816 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 00:11:44,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:11:44,816 INFO L85 PathProgramCache]: Analyzing trace with hash 59255213, now seen corresponding path program 1 times [2023-08-31 00:11:44,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:11:44,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697221444] [2023-08-31 00:11:44,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:11:44,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:11:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:11:44,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:11:44,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:11:44,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697221444] [2023-08-31 00:11:44,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697221444] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:11:44,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:11:44,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:11:44,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78200353] [2023-08-31 00:11:44,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:11:44,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:11:44,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:11:44,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:11:44,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:11:44,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 403 [2023-08-31 00:11:44,851 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 114 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:11:44,851 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:11:44,851 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 403 [2023-08-31 00:11:44,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand