./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6710ae2bfe9a41273181e1b4b9dbdfa98f0dea6daffb771915892955eccb69dd --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 23:00:59,982 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 23:00:59,983 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 23:01:00,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 23:01:00,023 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 23:01:00,025 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 23:01:00,027 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 23:01:00,029 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 23:01:00,030 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 23:01:00,034 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 23:01:00,034 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 23:01:00,036 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 23:01:00,037 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 23:01:00,038 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 23:01:00,039 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 23:01:00,040 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 23:01:00,043 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 23:01:00,043 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 23:01:00,045 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 23:01:00,049 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 23:01:00,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 23:01:00,053 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 23:01:00,053 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 23:01:00,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 23:01:00,056 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 23:01:00,059 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 23:01:00,059 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 23:01:00,059 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 23:01:00,060 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 23:01:00,061 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 23:01:00,061 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 23:01:00,062 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 23:01:00,063 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 23:01:00,064 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 23:01:00,064 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 23:01:00,065 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 23:01:00,065 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 23:01:00,065 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 23:01:00,066 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 23:01:00,066 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 23:01:00,074 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 23:01:00,075 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 23:01:00,094 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 23:01:00,094 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 23:01:00,095 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 23:01:00,095 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 23:01:00,096 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 23:01:00,096 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 23:01:00,096 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 23:01:00,096 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 23:01:00,097 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 23:01:00,097 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 23:01:00,097 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 23:01:00,098 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 23:01:00,098 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 23:01:00,098 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 23:01:00,098 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 23:01:00,098 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 23:01:00,098 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 23:01:00,099 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 23:01:00,099 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 23:01:00,099 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 23:01:00,099 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 23:01:00,099 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 23:01:00,099 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 23:01:00,100 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 23:01:00,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 23:01:00,100 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 23:01:00,100 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 23:01:00,100 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 23:01:00,100 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 23:01:00,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 23:01:00,101 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 23:01:00,101 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 23:01:00,101 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 23:01:00,101 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 23:01:00,101 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 23:01:00,101 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6710ae2bfe9a41273181e1b4b9dbdfa98f0dea6daffb771915892955eccb69dd Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 23:01:00,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 23:01:00,345 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 23:01:00,346 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 23:01:00,347 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 23:01:00,347 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 23:01:00,348 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs.i [2023-08-30 23:01:01,318 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 23:01:01,544 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 23:01:01,548 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs.i [2023-08-30 23:01:01,566 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7aec3e96/62bb542197ef41a78d2b6d13f941e56b/FLAGc19f4047e [2023-08-30 23:01:01,578 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7aec3e96/62bb542197ef41a78d2b6d13f941e56b [2023-08-30 23:01:01,581 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 23:01:01,582 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 23:01:01,584 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 23:01:01,584 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 23:01:01,586 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 23:01:01,587 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:01:01" (1/1) ... [2023-08-30 23:01:01,589 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4622c97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:01:01, skipping insertion in model container [2023-08-30 23:01:01,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:01:01" (1/1) ... [2023-08-30 23:01:01,593 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 23:01:01,628 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 23:01:01,869 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs.i[30553,30566] [2023-08-30 23:01:01,877 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 23:01:01,883 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 23:01:01,914 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs.i[30553,30566] [2023-08-30 23:01:01,922 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 23:01:01,950 INFO L208 MainTranslator]: Completed translation [2023-08-30 23:01:01,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:01:01 WrapperNode [2023-08-30 23:01:01,951 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 23:01:01,952 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 23:01:01,952 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 23:01:01,952 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 23:01:01,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:01:01" (1/1) ... [2023-08-30 23:01:01,977 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:01:01" (1/1) ... [2023-08-30 23:01:01,999 INFO L138 Inliner]: procedures = 172, calls = 27, calls flagged for inlining = 11, calls inlined = 15, statements flattened = 126 [2023-08-30 23:01:01,999 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 23:01:02,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 23:01:02,000 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 23:01:02,000 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 23:01:02,006 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:01:01" (1/1) ... [2023-08-30 23:01:02,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:01:01" (1/1) ... [2023-08-30 23:01:02,011 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:01:01" (1/1) ... [2023-08-30 23:01:02,011 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:01:01" (1/1) ... [2023-08-30 23:01:02,028 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:01:01" (1/1) ... [2023-08-30 23:01:02,031 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:01:01" (1/1) ... [2023-08-30 23:01:02,032 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:01:01" (1/1) ... [2023-08-30 23:01:02,032 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:01:01" (1/1) ... [2023-08-30 23:01:02,034 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 23:01:02,035 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 23:01:02,035 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 23:01:02,035 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 23:01:02,036 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:01:01" (1/1) ... [2023-08-30 23:01:02,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 23:01:02,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 23:01:02,069 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 23:01:02,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 23:01:02,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 23:01:02,115 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-08-30 23:01:02,115 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-08-30 23:01:02,116 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-30 23:01:02,119 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-30 23:01:02,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 23:01:02,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 23:01:02,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 23:01:02,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 23:01:02,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 23:01:02,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 23:01:02,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 23:01:02,121 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 23:01:02,250 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 23:01:02,251 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 23:01:02,481 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 23:01:02,561 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 23:01:02,561 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 23:01:02,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:01:02 BoogieIcfgContainer [2023-08-30 23:01:02,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 23:01:02,565 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 23:01:02,565 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 23:01:02,570 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 23:01:02,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 11:01:01" (1/3) ... [2023-08-30 23:01:02,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a876926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:01:02, skipping insertion in model container [2023-08-30 23:01:02,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:01:01" (2/3) ... [2023-08-30 23:01:02,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a876926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:01:02, skipping insertion in model container [2023-08-30 23:01:02,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:01:02" (3/3) ... [2023-08-30 23:01:02,572 INFO L112 eAbstractionObserver]: Analyzing ICFG 35_double_lock_p3_vs.i [2023-08-30 23:01:02,578 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 23:01:02,585 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 23:01:02,585 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 23:01:02,585 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 23:01:02,640 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:01:02,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 76 transitions, 162 flow [2023-08-30 23:01:02,713 INFO L130 PetriNetUnfolder]: 6/85 cut-off events. [2023-08-30 23:01:02,713 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:01:02,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 85 events. 6/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 122 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 69. Up to 4 conditions per place. [2023-08-30 23:01:02,718 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 76 transitions, 162 flow [2023-08-30 23:01:02,720 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 75 transitions, 158 flow [2023-08-30 23:01:02,724 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:01:02,733 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 76 places, 75 transitions, 158 flow [2023-08-30 23:01:02,737 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 76 places, 75 transitions, 158 flow [2023-08-30 23:01:02,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 75 transitions, 158 flow [2023-08-30 23:01:02,766 INFO L130 PetriNetUnfolder]: 6/85 cut-off events. [2023-08-30 23:01:02,766 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:01:02,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 85 events. 6/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 122 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 69. Up to 4 conditions per place. [2023-08-30 23:01:02,768 INFO L119 LiptonReduction]: Number of co-enabled transitions 1820 [2023-08-30 23:01:04,127 INFO L134 LiptonReduction]: Checked pairs total: 3426 [2023-08-30 23:01:04,127 INFO L136 LiptonReduction]: Total number of compositions: 59 [2023-08-30 23:01:04,138 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:01:04,142 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;@4f2f37aa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:01:04,143 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 23:01:04,145 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2023-08-30 23:01:04,146 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:01:04,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:01:04,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 23:01:04,147 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 23:01:04,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:01:04,150 INFO L85 PathProgramCache]: Analyzing trace with hash 460053008, now seen corresponding path program 1 times [2023-08-30 23:01:04,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:01:04,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293785702] [2023-08-30 23:01:04,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:01:04,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:01:04,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:01:04,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:01:04,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:01:04,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293785702] [2023-08-30 23:01:04,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293785702] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:01:04,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:01:04,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 23:01:04,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675863365] [2023-08-30 23:01:04,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:01:04,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:01:04,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:01:04,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:01:04,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:01:04,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 135 [2023-08-30 23:01:04,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:04,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:01:04,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 135 [2023-08-30 23:01:04,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:01:04,571 INFO L130 PetriNetUnfolder]: 182/313 cut-off events. [2023-08-30 23:01:04,571 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 23:01:04,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 636 conditions, 313 events. 182/313 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1159 event pairs, 51 based on Foata normal form. 12/315 useless extension candidates. Maximal degree in co-relation 626. Up to 222 conditions per place. [2023-08-30 23:01:04,578 INFO L137 encePairwiseOnDemand]: 129/135 looper letters, 20 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2023-08-30 23:01:04,578 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 25 transitions, 102 flow [2023-08-30 23:01:04,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:01:04,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:01:04,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 197 transitions. [2023-08-30 23:01:04,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48641975308641977 [2023-08-30 23:01:04,591 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 197 transitions. [2023-08-30 23:01:04,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 197 transitions. [2023-08-30 23:01:04,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:01:04,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 197 transitions. [2023-08-30 23:01:04,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:04,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:04,603 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:04,604 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 56 flow. Second operand 3 states and 197 transitions. [2023-08-30 23:01:04,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 25 transitions, 102 flow [2023-08-30 23:01:04,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 25 transitions, 101 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:01:04,608 INFO L231 Difference]: Finished difference. Result has 27 places, 21 transitions, 57 flow [2023-08-30 23:01:04,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=27, PETRI_TRANSITIONS=21} [2023-08-30 23:01:04,612 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2023-08-30 23:01:04,612 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 21 transitions, 57 flow [2023-08-30 23:01:04,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:04,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:01:04,613 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-30 23:01:04,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 23:01:04,614 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 23:01:04,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:01:04,621 INFO L85 PathProgramCache]: Analyzing trace with hash 906397124, now seen corresponding path program 1 times [2023-08-30 23:01:04,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:01:04,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863403460] [2023-08-30 23:01:04,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:01:04,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:01:04,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:01:04,648 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 23:01:04,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:01:04,698 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 23:01:04,699 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 23:01:04,700 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-30 23:01:04,702 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-30 23:01:04,706 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-30 23:01:04,706 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-30 23:01:04,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 23:01:04,706 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 23:01:04,709 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 23:01:04,709 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 23:01:04,743 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:01:04,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 118 transitions, 260 flow [2023-08-30 23:01:04,762 INFO L130 PetriNetUnfolder]: 8/125 cut-off events. [2023-08-30 23:01:04,762 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 23:01:04,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 125 events. 8/125 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 233 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 134. Up to 6 conditions per place. [2023-08-30 23:01:04,764 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 118 transitions, 260 flow [2023-08-30 23:01:04,765 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 103 transitions, 221 flow [2023-08-30 23:01:04,765 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:01:04,765 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 103 transitions, 221 flow [2023-08-30 23:01:04,765 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 103 transitions, 221 flow [2023-08-30 23:01:04,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 103 transitions, 221 flow [2023-08-30 23:01:04,791 INFO L130 PetriNetUnfolder]: 8/125 cut-off events. [2023-08-30 23:01:04,792 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 23:01:04,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 125 events. 8/125 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 235 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 113. Up to 6 conditions per place. [2023-08-30 23:01:04,795 INFO L119 LiptonReduction]: Number of co-enabled transitions 4762 [2023-08-30 23:01:06,438 INFO L134 LiptonReduction]: Checked pairs total: 14107 [2023-08-30 23:01:06,438 INFO L136 LiptonReduction]: Total number of compositions: 72 [2023-08-30 23:01:06,441 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:01:06,445 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;@4f2f37aa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:01:06,446 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-30 23:01:06,447 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2023-08-30 23:01:06,447 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:01:06,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:01:06,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 23:01:06,448 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 23:01:06,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:01:06,448 INFO L85 PathProgramCache]: Analyzing trace with hash 681007459, now seen corresponding path program 1 times [2023-08-30 23:01:06,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:01:06,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261257261] [2023-08-30 23:01:06,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:01:06,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:01:06,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:01:06,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:01:06,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:01:06,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261257261] [2023-08-30 23:01:06,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261257261] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:01:06,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:01:06,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 23:01:06,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662015278] [2023-08-30 23:01:06,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:01:06,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:01:06,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:01:06,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:01:06,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:01:06,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 190 [2023-08-30 23:01:06,553 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:06,553 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:01:06,553 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 190 [2023-08-30 23:01:06,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:01:06,883 INFO L130 PetriNetUnfolder]: 3000/4499 cut-off events. [2023-08-30 23:01:06,883 INFO L131 PetriNetUnfolder]: For 166/166 co-relation queries the response was YES. [2023-08-30 23:01:06,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8942 conditions, 4499 events. 3000/4499 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 25061 event pairs, 851 based on Foata normal form. 0/4010 useless extension candidates. Maximal degree in co-relation 8931. Up to 3957 conditions per place. [2023-08-30 23:01:06,900 INFO L137 encePairwiseOnDemand]: 184/190 looper letters, 39 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2023-08-30 23:01:06,900 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 51 transitions, 206 flow [2023-08-30 23:01:06,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:01:06,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:01:06,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 290 transitions. [2023-08-30 23:01:06,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5087719298245614 [2023-08-30 23:01:06,902 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 290 transitions. [2023-08-30 23:01:06,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 290 transitions. [2023-08-30 23:01:06,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:01:06,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 290 transitions. [2023-08-30 23:01:06,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:06,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:06,905 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:06,905 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 99 flow. Second operand 3 states and 290 transitions. [2023-08-30 23:01:06,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 51 transitions, 206 flow [2023-08-30 23:01:06,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 203 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 23:01:06,907 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 111 flow [2023-08-30 23:01:06,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-08-30 23:01:06,908 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 0 predicate places. [2023-08-30 23:01:06,908 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 111 flow [2023-08-30 23:01:06,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:06,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:01:06,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:01:06,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 23:01:06,909 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 23:01:06,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:01:06,909 INFO L85 PathProgramCache]: Analyzing trace with hash -226819370, now seen corresponding path program 1 times [2023-08-30 23:01:06,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:01:06,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189876493] [2023-08-30 23:01:06,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:01:06,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:01:06,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:01:06,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:01:06,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:01:06,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189876493] [2023-08-30 23:01:06,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189876493] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:01:06,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:01:06,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:01:06,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964011732] [2023-08-30 23:01:06,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:01:06,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 23:01:06,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:01:06,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 23:01:06,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 23:01:07,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 190 [2023-08-30 23:01:07,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 111 flow. Second operand has 5 states, 5 states have (on average 80.0) internal successors, (400), 5 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:07,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:01:07,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 190 [2023-08-30 23:01:07,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:01:07,537 INFO L130 PetriNetUnfolder]: 4083/6060 cut-off events. [2023-08-30 23:01:07,537 INFO L131 PetriNetUnfolder]: For 662/662 co-relation queries the response was YES. [2023-08-30 23:01:07,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12706 conditions, 6060 events. 4083/6060 cut-off events. For 662/662 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 35504 event pairs, 887 based on Foata normal form. 48/5829 useless extension candidates. Maximal degree in co-relation 12693. Up to 4252 conditions per place. [2023-08-30 23:01:07,565 INFO L137 encePairwiseOnDemand]: 180/190 looper letters, 84 selfloop transitions, 17 changer transitions 0/109 dead transitions. [2023-08-30 23:01:07,566 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 109 transitions, 478 flow [2023-08-30 23:01:07,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 23:01:07,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 23:01:07,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 649 transitions. [2023-08-30 23:01:07,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48796992481203005 [2023-08-30 23:01:07,568 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 649 transitions. [2023-08-30 23:01:07,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 649 transitions. [2023-08-30 23:01:07,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:01:07,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 649 transitions. [2023-08-30 23:01:07,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 92.71428571428571) internal successors, (649), 7 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:07,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 190.0) internal successors, (1520), 8 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:07,573 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 190.0) internal successors, (1520), 8 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:07,573 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 111 flow. Second operand 7 states and 649 transitions. [2023-08-30 23:01:07,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 109 transitions, 478 flow [2023-08-30 23:01:07,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 109 transitions, 474 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:01:07,575 INFO L231 Difference]: Finished difference. Result has 56 places, 56 transitions, 227 flow [2023-08-30 23:01:07,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=227, PETRI_PLACES=56, PETRI_TRANSITIONS=56} [2023-08-30 23:01:07,576 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 9 predicate places. [2023-08-30 23:01:07,576 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 56 transitions, 227 flow [2023-08-30 23:01:07,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.0) internal successors, (400), 5 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:07,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:01:07,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:01:07,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 23:01:07,576 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 23:01:07,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:01:07,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1069921046, now seen corresponding path program 1 times [2023-08-30 23:01:07,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:01:07,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104885548] [2023-08-30 23:01:07,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:01:07,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:01:07,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:01:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:01:07,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:01:07,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104885548] [2023-08-30 23:01:07,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104885548] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:01:07,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:01:07,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 23:01:07,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031062435] [2023-08-30 23:01:07,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:01:07,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 23:01:07,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:01:07,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 23:01:07,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-30 23:01:07,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 190 [2023-08-30 23:01:07,683 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 227 flow. Second operand has 7 states, 7 states have (on average 77.71428571428571) internal successors, (544), 7 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:07,683 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:01:07,683 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 190 [2023-08-30 23:01:07,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:01:08,399 INFO L130 PetriNetUnfolder]: 4841/7252 cut-off events. [2023-08-30 23:01:08,400 INFO L131 PetriNetUnfolder]: For 3867/3923 co-relation queries the response was YES. [2023-08-30 23:01:08,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18108 conditions, 7252 events. 4841/7252 cut-off events. For 3867/3923 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 44778 event pairs, 639 based on Foata normal form. 108/7095 useless extension candidates. Maximal degree in co-relation 18090. Up to 3998 conditions per place. [2023-08-30 23:01:08,436 INFO L137 encePairwiseOnDemand]: 179/190 looper letters, 111 selfloop transitions, 23 changer transitions 0/142 dead transitions. [2023-08-30 23:01:08,436 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 142 transitions, 746 flow [2023-08-30 23:01:08,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 23:01:08,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 23:01:08,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 819 transitions. [2023-08-30 23:01:08,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4789473684210526 [2023-08-30 23:01:08,439 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 819 transitions. [2023-08-30 23:01:08,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 819 transitions. [2023-08-30 23:01:08,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:01:08,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 819 transitions. [2023-08-30 23:01:08,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 91.0) internal successors, (819), 9 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:08,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 190.0) internal successors, (1900), 10 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:08,444 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 190.0) internal successors, (1900), 10 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:08,444 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 227 flow. Second operand 9 states and 819 transitions. [2023-08-30 23:01:08,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 142 transitions, 746 flow [2023-08-30 23:01:08,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 142 transitions, 738 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 23:01:08,456 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 321 flow [2023-08-30 23:01:08,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=321, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2023-08-30 23:01:08,457 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 18 predicate places. [2023-08-30 23:01:08,458 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 321 flow [2023-08-30 23:01:08,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 77.71428571428571) internal successors, (544), 7 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:08,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:01:08,458 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 23:01:08,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 23:01:08,458 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 23:01:08,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:01:08,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1848916684, now seen corresponding path program 1 times [2023-08-30 23:01:08,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:01:08,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145239182] [2023-08-30 23:01:08,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:01:08,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:01:08,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:01:08,471 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 23:01:08,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:01:08,490 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 23:01:08,493 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 23:01:08,493 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-30 23:01:08,493 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-30 23:01:08,493 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2023-08-30 23:01:08,494 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-30 23:01:08,494 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-30 23:01:08,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 23:01:08,494 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 23:01:08,494 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 23:01:08,494 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 23:01:08,527 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:01:08,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 160 transitions, 362 flow [2023-08-30 23:01:08,546 INFO L130 PetriNetUnfolder]: 10/165 cut-off events. [2023-08-30 23:01:08,546 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 23:01:08,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 165 events. 10/165 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 389 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 179. Up to 8 conditions per place. [2023-08-30 23:01:08,546 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 160 transitions, 362 flow [2023-08-30 23:01:08,547 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 131 transitions, 286 flow [2023-08-30 23:01:08,547 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:01:08,547 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 134 places, 131 transitions, 286 flow [2023-08-30 23:01:08,548 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 134 places, 131 transitions, 286 flow [2023-08-30 23:01:08,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 131 transitions, 286 flow [2023-08-30 23:01:08,619 INFO L130 PetriNetUnfolder]: 10/165 cut-off events. [2023-08-30 23:01:08,620 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 23:01:08,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 165 events. 10/165 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 391 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 158. Up to 8 conditions per place. [2023-08-30 23:01:08,623 INFO L119 LiptonReduction]: Number of co-enabled transitions 9216 [2023-08-30 23:01:10,595 INFO L134 LiptonReduction]: Checked pairs total: 26169 [2023-08-30 23:01:10,595 INFO L136 LiptonReduction]: Total number of compositions: 88 [2023-08-30 23:01:10,596 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:01:10,597 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;@4f2f37aa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:01:10,597 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-30 23:01:10,598 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2023-08-30 23:01:10,598 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:01:10,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:01:10,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 23:01:10,598 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-30 23:01:10,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:01:10,598 INFO L85 PathProgramCache]: Analyzing trace with hash 957231032, now seen corresponding path program 1 times [2023-08-30 23:01:10,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:01:10,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049965074] [2023-08-30 23:01:10,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:01:10,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:01:10,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:01:10,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:01:10,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:01:10,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049965074] [2023-08-30 23:01:10,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049965074] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:01:10,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:01:10,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 23:01:10,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017202537] [2023-08-30 23:01:10,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:01:10,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:01:10,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:01:10,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:01:10,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:01:10,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 248 [2023-08-30 23:01:10,663 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:10,663 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:01:10,663 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 248 [2023-08-30 23:01:10,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:01:14,431 INFO L130 PetriNetUnfolder]: 41727/56396 cut-off events. [2023-08-30 23:01:14,431 INFO L131 PetriNetUnfolder]: For 3307/3307 co-relation queries the response was YES. [2023-08-30 23:01:14,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112636 conditions, 56396 events. 41727/56396 cut-off events. For 3307/3307 co-relation queries the response was YES. Maximal size of possible extension queue 1746. Compared 354235 event pairs, 14741 based on Foata normal form. 0/50313 useless extension candidates. Maximal degree in co-relation 112624. Up to 52818 conditions per place. [2023-08-30 23:01:14,768 INFO L137 encePairwiseOnDemand]: 241/248 looper letters, 53 selfloop transitions, 4 changer transitions 0/69 dead transitions. [2023-08-30 23:01:14,768 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 69 transitions, 288 flow [2023-08-30 23:01:14,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:01:14,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:01:14,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 380 transitions. [2023-08-30 23:01:14,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.510752688172043 [2023-08-30 23:01:14,770 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 380 transitions. [2023-08-30 23:01:14,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 380 transitions. [2023-08-30 23:01:14,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:01:14,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 380 transitions. [2023-08-30 23:01:14,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:14,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:14,774 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:14,774 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 136 flow. Second operand 3 states and 380 transitions. [2023-08-30 23:01:14,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 69 transitions, 288 flow [2023-08-30 23:01:14,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 69 transitions, 279 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 23:01:14,776 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 151 flow [2023-08-30 23:01:14,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2023-08-30 23:01:14,778 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 0 predicate places. [2023-08-30 23:01:14,778 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 151 flow [2023-08-30 23:01:14,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:14,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:01:14,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:01:14,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 23:01:14,779 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-30 23:01:14,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:01:14,779 INFO L85 PathProgramCache]: Analyzing trace with hash 596529296, now seen corresponding path program 1 times [2023-08-30 23:01:14,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:01:14,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227222608] [2023-08-30 23:01:14,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:01:14,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:01:14,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:01:14,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:01:14,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:01:14,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227222608] [2023-08-30 23:01:14,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227222608] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:01:14,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:01:14,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:01:14,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899231295] [2023-08-30 23:01:14,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:01:14,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 23:01:14,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:01:14,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 23:01:14,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 23:01:14,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 248 [2023-08-30 23:01:14,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 151 flow. Second operand has 5 states, 5 states have (on average 105.0) internal successors, (525), 5 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:14,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:01:14,894 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 248 [2023-08-30 23:01:14,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:01:20,070 INFO L130 PetriNetUnfolder]: 58976/79355 cut-off events. [2023-08-30 23:01:20,070 INFO L131 PetriNetUnfolder]: For 9473/9473 co-relation queries the response was YES. [2023-08-30 23:01:20,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166634 conditions, 79355 events. 58976/79355 cut-off events. For 9473/9473 co-relation queries the response was YES. Maximal size of possible extension queue 2604. Compared 518506 event pairs, 16303 based on Foata normal form. 436/75210 useless extension candidates. Maximal degree in co-relation 166620. Up to 59465 conditions per place. [2023-08-30 23:01:20,408 INFO L137 encePairwiseOnDemand]: 234/248 looper letters, 126 selfloop transitions, 27 changer transitions 0/164 dead transitions. [2023-08-30 23:01:20,409 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 164 transitions, 738 flow [2023-08-30 23:01:20,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 23:01:20,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 23:01:20,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 876 transitions. [2023-08-30 23:01:20,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5046082949308756 [2023-08-30 23:01:20,411 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 876 transitions. [2023-08-30 23:01:20,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 876 transitions. [2023-08-30 23:01:20,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:01:20,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 876 transitions. [2023-08-30 23:01:20,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 125.14285714285714) internal successors, (876), 7 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:20,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 248.0) internal successors, (1984), 8 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:20,416 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 248.0) internal successors, (1984), 8 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:20,417 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 151 flow. Second operand 7 states and 876 transitions. [2023-08-30 23:01:20,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 164 transitions, 738 flow [2023-08-30 23:01:20,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 164 transitions, 732 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:01:20,428 INFO L231 Difference]: Finished difference. Result has 71 places, 80 transitions, 342 flow [2023-08-30 23:01:20,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=342, PETRI_PLACES=71, PETRI_TRANSITIONS=80} [2023-08-30 23:01:20,429 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 9 predicate places. [2023-08-30 23:01:20,429 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 80 transitions, 342 flow [2023-08-30 23:01:20,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.0) internal successors, (525), 5 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:20,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:01:20,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:01:20,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 23:01:20,430 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-30 23:01:20,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:01:20,430 INFO L85 PathProgramCache]: Analyzing trace with hash 2034031899, now seen corresponding path program 1 times [2023-08-30 23:01:20,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:01:20,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495127369] [2023-08-30 23:01:20,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:01:20,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:01:20,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:01:20,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:01:20,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:01:20,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495127369] [2023-08-30 23:01:20,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495127369] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:01:20,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:01:20,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 23:01:20,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157600987] [2023-08-30 23:01:20,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:01:20,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 23:01:20,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:01:20,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 23:01:20,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 23:01:20,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 248 [2023-08-30 23:01:20,557 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 80 transitions, 342 flow. Second operand has 6 states, 6 states have (on average 103.0) internal successors, (618), 6 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:20,557 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:01:20,558 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 248 [2023-08-30 23:01:20,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:01:27,967 INFO L130 PetriNetUnfolder]: 75627/102762 cut-off events. [2023-08-30 23:01:27,967 INFO L131 PetriNetUnfolder]: For 67225/68249 co-relation queries the response was YES. [2023-08-30 23:01:28,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267955 conditions, 102762 events. 75627/102762 cut-off events. For 67225/68249 co-relation queries the response was YES. Maximal size of possible extension queue 3488. Compared 709508 event pairs, 18517 based on Foata normal form. 1058/98272 useless extension candidates. Maximal degree in co-relation 267936. Up to 60295 conditions per place. [2023-08-30 23:01:28,543 INFO L137 encePairwiseOnDemand]: 232/248 looper letters, 179 selfloop transitions, 47 changer transitions 0/237 dead transitions. [2023-08-30 23:01:28,543 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 237 transitions, 1326 flow [2023-08-30 23:01:28,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 23:01:28,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 23:01:28,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1135 transitions. [2023-08-30 23:01:28,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5085125448028673 [2023-08-30 23:01:28,556 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1135 transitions. [2023-08-30 23:01:28,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1135 transitions. [2023-08-30 23:01:28,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:01:28,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1135 transitions. [2023-08-30 23:01:28,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 126.11111111111111) internal successors, (1135), 9 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:28,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 248.0) internal successors, (2480), 10 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:28,705 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 248.0) internal successors, (2480), 10 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:28,705 INFO L175 Difference]: Start difference. First operand has 71 places, 80 transitions, 342 flow. Second operand 9 states and 1135 transitions. [2023-08-30 23:01:28,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 237 transitions, 1326 flow [2023-08-30 23:01:28,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 237 transitions, 1312 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 23:01:28,886 INFO L231 Difference]: Finished difference. Result has 81 places, 100 transitions, 621 flow [2023-08-30 23:01:28,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=621, PETRI_PLACES=81, PETRI_TRANSITIONS=100} [2023-08-30 23:01:28,888 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 19 predicate places. [2023-08-30 23:01:28,888 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 100 transitions, 621 flow [2023-08-30 23:01:28,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 103.0) internal successors, (618), 6 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:28,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:01:28,889 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:01:28,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 23:01:28,889 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-30 23:01:28,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:01:28,889 INFO L85 PathProgramCache]: Analyzing trace with hash 326842020, now seen corresponding path program 1 times [2023-08-30 23:01:28,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:01:28,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193396864] [2023-08-30 23:01:28,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:01:28,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:01:28,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:01:28,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 23:01:28,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:01:28,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193396864] [2023-08-30 23:01:28,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193396864] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:01:28,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:01:28,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:01:28,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680188449] [2023-08-30 23:01:28,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:01:28,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 23:01:28,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:01:28,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 23:01:28,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 23:01:29,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 248 [2023-08-30 23:01:29,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 100 transitions, 621 flow. Second operand has 5 states, 5 states have (on average 105.2) internal successors, (526), 5 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:29,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:01:29,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 248 [2023-08-30 23:01:29,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:01:38,540 INFO L130 PetriNetUnfolder]: 91025/124280 cut-off events. [2023-08-30 23:01:38,540 INFO L131 PetriNetUnfolder]: For 219551/222751 co-relation queries the response was YES. [2023-08-30 23:01:38,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 393275 conditions, 124280 events. 91025/124280 cut-off events. For 219551/222751 co-relation queries the response was YES. Maximal size of possible extension queue 4444. Compared 883827 event pairs, 22125 based on Foata normal form. 348/118823 useless extension candidates. Maximal degree in co-relation 393252. Up to 103275 conditions per place. [2023-08-30 23:01:39,341 INFO L137 encePairwiseOnDemand]: 235/248 looper letters, 176 selfloop transitions, 26 changer transitions 0/214 dead transitions. [2023-08-30 23:01:39,341 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 214 transitions, 1627 flow [2023-08-30 23:01:39,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 23:01:39,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 23:01:39,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 746 transitions. [2023-08-30 23:01:39,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013440860215054 [2023-08-30 23:01:39,343 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 746 transitions. [2023-08-30 23:01:39,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 746 transitions. [2023-08-30 23:01:39,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:01:39,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 746 transitions. [2023-08-30 23:01:39,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 124.33333333333333) internal successors, (746), 6 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:39,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 248.0) internal successors, (1736), 7 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:39,347 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 248.0) internal successors, (1736), 7 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:39,347 INFO L175 Difference]: Start difference. First operand has 81 places, 100 transitions, 621 flow. Second operand 6 states and 746 transitions. [2023-08-30 23:01:39,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 214 transitions, 1627 flow [2023-08-30 23:01:40,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 214 transitions, 1450 flow, removed 56 selfloop flow, removed 4 redundant places. [2023-08-30 23:01:40,145 INFO L231 Difference]: Finished difference. Result has 85 places, 120 transitions, 782 flow [2023-08-30 23:01:40,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=782, PETRI_PLACES=85, PETRI_TRANSITIONS=120} [2023-08-30 23:01:40,146 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 23 predicate places. [2023-08-30 23:01:40,146 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 120 transitions, 782 flow [2023-08-30 23:01:40,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.2) internal successors, (526), 5 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:40,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:01:40,147 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:01:40,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 23:01:40,147 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-30 23:01:40,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:01:40,147 INFO L85 PathProgramCache]: Analyzing trace with hash 562489667, now seen corresponding path program 1 times [2023-08-30 23:01:40,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:01:40,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543001216] [2023-08-30 23:01:40,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:01:40,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:01:40,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:01:40,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 23:01:40,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:01:40,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543001216] [2023-08-30 23:01:40,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543001216] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:01:40,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:01:40,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 23:01:40,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994817273] [2023-08-30 23:01:40,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:01:40,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 23:01:40,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:01:40,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 23:01:40,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 23:01:40,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 248 [2023-08-30 23:01:40,249 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 120 transitions, 782 flow. Second operand has 6 states, 6 states have (on average 103.16666666666667) internal successors, (619), 6 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:40,249 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:01:40,249 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 248 [2023-08-30 23:01:40,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:01:55,361 INFO L130 PetriNetUnfolder]: 135077/182859 cut-off events. [2023-08-30 23:01:55,364 INFO L131 PetriNetUnfolder]: For 410084/413468 co-relation queries the response was YES. [2023-08-30 23:01:55,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 598979 conditions, 182859 events. 135077/182859 cut-off events. For 410084/413468 co-relation queries the response was YES. Maximal size of possible extension queue 6546. Compared 1333695 event pairs, 30189 based on Foata normal form. 1404/176990 useless extension candidates. Maximal degree in co-relation 598951. Up to 116503 conditions per place. [2023-08-30 23:01:56,761 INFO L137 encePairwiseOnDemand]: 232/248 looper letters, 284 selfloop transitions, 65 changer transitions 0/360 dead transitions. [2023-08-30 23:01:56,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 360 transitions, 2678 flow [2023-08-30 23:01:56,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 23:01:56,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 23:01:56,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1143 transitions. [2023-08-30 23:01:56,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5120967741935484 [2023-08-30 23:01:56,774 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1143 transitions. [2023-08-30 23:01:56,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1143 transitions. [2023-08-30 23:01:56,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:01:56,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1143 transitions. [2023-08-30 23:01:56,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 127.0) internal successors, (1143), 9 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:56,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 248.0) internal successors, (2480), 10 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:56,790 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 248.0) internal successors, (2480), 10 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:56,790 INFO L175 Difference]: Start difference. First operand has 85 places, 120 transitions, 782 flow. Second operand 9 states and 1143 transitions. [2023-08-30 23:01:56,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 360 transitions, 2678 flow [2023-08-30 23:01:58,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 360 transitions, 2557 flow, removed 48 selfloop flow, removed 1 redundant places. [2023-08-30 23:01:58,376 INFO L231 Difference]: Finished difference. Result has 96 places, 159 transitions, 1279 flow [2023-08-30 23:01:58,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=715, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1279, PETRI_PLACES=96, PETRI_TRANSITIONS=159} [2023-08-30 23:01:58,377 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 34 predicate places. [2023-08-30 23:01:58,377 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 159 transitions, 1279 flow [2023-08-30 23:01:58,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 103.16666666666667) internal successors, (619), 6 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:58,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:01:58,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:01:58,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 23:01:58,379 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-30 23:01:58,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:01:58,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1481009839, now seen corresponding path program 1 times [2023-08-30 23:01:58,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:01:58,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838047528] [2023-08-30 23:01:58,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:01:58,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:01:58,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:01:58,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:01:58,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:01:58,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838047528] [2023-08-30 23:01:58,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838047528] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:01:58,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:01:58,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 23:01:58,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515387203] [2023-08-30 23:01:58,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:01:58,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 23:01:58,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:01:58,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 23:01:58,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 23:01:58,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 248 [2023-08-30 23:01:58,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 159 transitions, 1279 flow. Second operand has 8 states, 8 states have (on average 98.0) internal successors, (784), 8 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:58,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:01:58,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 248 [2023-08-30 23:01:58,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:02:24,330 INFO L130 PetriNetUnfolder]: 217820/290337 cut-off events. [2023-08-30 23:02:24,331 INFO L131 PetriNetUnfolder]: For 1338561/1341119 co-relation queries the response was YES. [2023-08-30 23:02:25,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1072953 conditions, 290337 events. 217820/290337 cut-off events. For 1338561/1341119 co-relation queries the response was YES. Maximal size of possible extension queue 9863. Compared 2144632 event pairs, 25053 based on Foata normal form. 6064/285168 useless extension candidates. Maximal degree in co-relation 1072920. Up to 123099 conditions per place. [2023-08-30 23:02:26,757 INFO L137 encePairwiseOnDemand]: 228/248 looper letters, 421 selfloop transitions, 232 changer transitions 0/665 dead transitions. [2023-08-30 23:02:26,757 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 665 transitions, 6313 flow [2023-08-30 23:02:26,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 23:02:26,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 23:02:26,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1845 transitions. [2023-08-30 23:02:26,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959677419354839 [2023-08-30 23:02:26,781 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1845 transitions. [2023-08-30 23:02:26,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1845 transitions. [2023-08-30 23:02:26,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:02:26,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1845 transitions. [2023-08-30 23:02:26,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 123.0) internal successors, (1845), 15 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:02:26,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 248.0) internal successors, (3968), 16 states have internal predecessors, (3968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:02:26,800 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 248.0) internal successors, (3968), 16 states have internal predecessors, (3968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:02:26,800 INFO L175 Difference]: Start difference. First operand has 96 places, 159 transitions, 1279 flow. Second operand 15 states and 1845 transitions. [2023-08-30 23:02:26,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 665 transitions, 6313 flow [2023-08-30 23:02:38,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 665 transitions, 5448 flow, removed 364 selfloop flow, removed 3 redundant places. [2023-08-30 23:02:38,459 INFO L231 Difference]: Finished difference. Result has 116 places, 325 transitions, 3715 flow [2023-08-30 23:02:38,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1119, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3715, PETRI_PLACES=116, PETRI_TRANSITIONS=325} [2023-08-30 23:02:38,461 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 54 predicate places. [2023-08-30 23:02:38,461 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 325 transitions, 3715 flow [2023-08-30 23:02:38,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 98.0) internal successors, (784), 8 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:02:38,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:02:38,476 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:02:38,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 23:02:38,477 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-30 23:02:38,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:02:38,477 INFO L85 PathProgramCache]: Analyzing trace with hash 456391473, now seen corresponding path program 1 times [2023-08-30 23:02:38,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:02:38,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684674210] [2023-08-30 23:02:38,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:02:38,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:02:38,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:02:38,491 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 23:02:38,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:02:38,519 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 23:02:38,520 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 23:02:38,520 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-30 23:02:38,520 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-30 23:02:38,520 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-08-30 23:02:38,520 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-30 23:02:38,521 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-30 23:02:38,521 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-30 23:02:38,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 23:02:38,521 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:02:38,521 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 23:02:38,521 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 23:02:38,574 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:02:38,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 202 transitions, 468 flow [2023-08-30 23:02:38,588 INFO L130 PetriNetUnfolder]: 12/205 cut-off events. [2023-08-30 23:02:38,592 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 23:02:38,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 205 events. 12/205 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 571 event pairs, 0 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 225. Up to 10 conditions per place. [2023-08-30 23:02:38,593 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 202 transitions, 468 flow [2023-08-30 23:02:38,594 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 163 places, 159 transitions, 353 flow [2023-08-30 23:02:38,595 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:02:38,595 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 163 places, 159 transitions, 353 flow [2023-08-30 23:02:38,595 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 163 places, 159 transitions, 353 flow [2023-08-30 23:02:38,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 159 transitions, 353 flow [2023-08-30 23:02:38,606 INFO L130 PetriNetUnfolder]: 12/205 cut-off events. [2023-08-30 23:02:38,624 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 23:02:38,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 205 events. 12/205 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 569 event pairs, 0 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 204. Up to 10 conditions per place. [2023-08-30 23:02:38,631 INFO L119 LiptonReduction]: Number of co-enabled transitions 15182 [2023-08-30 23:02:40,856 INFO L134 LiptonReduction]: Checked pairs total: 52357 [2023-08-30 23:02:40,857 INFO L136 LiptonReduction]: Total number of compositions: 106 [2023-08-30 23:02:40,859 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:02:40,859 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;@4f2f37aa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:02:40,859 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 23:02:40,860 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2023-08-30 23:02:40,860 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:02:40,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:02:40,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 23:02:40,861 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 23:02:40,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:02:40,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1290665048, now seen corresponding path program 1 times [2023-08-30 23:02:40,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:02:40,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274405099] [2023-08-30 23:02:40,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:02:40,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:02:40,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:02:40,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:02:40,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:02:40,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274405099] [2023-08-30 23:02:40,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274405099] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:02:40,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:02:40,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 23:02:40,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993828025] [2023-08-30 23:02:40,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:02:40,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:02:40,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:02:40,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:02:40,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:02:40,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 308 [2023-08-30 23:02:40,921 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 71 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:02:40,921 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:02:40,921 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 308 [2023-08-30 23:02:40,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand