./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-data-race.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for data races Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-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 ! data-race) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dce9d71ca8bbe247a74e6b2653e5cdb882c6b8b5d902edf534df70d90ee806fe --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 21:03:24,346 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 21:03:24,349 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 21:03:24,391 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 21:03:24,392 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 21:03:24,395 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 21:03:24,396 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 21:03:24,399 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 21:03:24,401 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 21:03:24,406 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 21:03:24,407 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 21:03:24,409 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 21:03:24,409 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 21:03:24,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 21:03:24,412 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 21:03:24,419 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 21:03:24,420 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 21:03:24,421 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 21:03:24,423 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 21:03:24,428 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 21:03:24,429 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 21:03:24,430 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 21:03:24,431 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 21:03:24,431 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 21:03:24,438 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 21:03:24,438 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 21:03:24,438 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 21:03:24,440 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 21:03:24,441 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 21:03:24,442 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 21:03:24,442 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 21:03:24,443 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 21:03:24,445 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 21:03:24,446 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 21:03:24,447 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 21:03:24,447 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 21:03:24,447 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 21:03:24,448 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 21:03:24,448 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 21:03:24,448 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 21:03:24,449 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 21:03:24,451 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-32bit-Automizer_Default.epf [2023-08-31 21:03:24,483 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 21:03:24,483 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 21:03:24,484 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 21:03:24,484 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 21:03:24,485 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 21:03:24,485 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 21:03:24,486 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 21:03:24,486 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 21:03:24,486 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 21:03:24,486 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 21:03:24,487 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 21:03:24,487 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 21:03:24,488 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 21:03:24,488 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 21:03:24,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 21:03:24,488 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 21:03:24,488 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 21:03:24,488 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 21:03:24,489 INFO L138 SettingsManager]: * Check absence of data races in concurrent programs=true [2023-08-31 21:03:24,489 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 21:03:24,489 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 21:03:24,489 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 21:03:24,489 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 21:03:24,489 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 21:03:24,490 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 21:03:24,490 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 21:03:24,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 21:03:24,490 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 21:03:24,490 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 21:03:24,490 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 21:03:24,491 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 21:03:24,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 21:03:24,491 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 21:03:24,491 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 21:03:24,491 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 21:03:24,492 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 21:03:24,492 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 21:03:24,492 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dce9d71ca8bbe247a74e6b2653e5cdb882c6b8b5d902edf534df70d90ee806fe Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 21:03:24,801 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 21:03:24,818 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 21:03:24,821 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 21:03:24,822 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 21:03:24,822 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 21:03:24,824 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2023-08-31 21:03:25,964 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 21:03:26,262 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 21:03:26,263 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2023-08-31 21:03:26,275 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad2cbce81/f1c3bdde2bee4a3d8dd37f234ed35d2e/FLAG60cfa6c8a [2023-08-31 21:03:26,290 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad2cbce81/f1c3bdde2bee4a3d8dd37f234ed35d2e [2023-08-31 21:03:26,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 21:03:26,294 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 21:03:26,295 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 21:03:26,295 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 21:03:26,298 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 21:03:26,299 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 09:03:26" (1/1) ... [2023-08-31 21:03:26,299 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f4262a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:03:26, skipping insertion in model container [2023-08-31 21:03:26,300 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 09:03:26" (1/1) ... [2023-08-31 21:03:26,305 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 21:03:26,336 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 21:03:26,694 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i[41323,41336] [2023-08-31 21:03:26,730 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 21:03:26,748 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 21:03:26,793 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i[41323,41336] [2023-08-31 21:03:26,819 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 21:03:26,874 INFO L208 MainTranslator]: Completed translation [2023-08-31 21:03:26,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:03:26 WrapperNode [2023-08-31 21:03:26,875 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 21:03:26,876 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 21:03:26,876 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 21:03:26,876 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 21:03:26,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:03:26" (1/1) ... [2023-08-31 21:03:26,900 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:03:26" (1/1) ... [2023-08-31 21:03:26,938 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 256 [2023-08-31 21:03:26,947 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 21:03:26,949 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 21:03:26,949 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 21:03:26,949 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 21:03:26,956 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:03:26" (1/1) ... [2023-08-31 21:03:26,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:03:26" (1/1) ... [2023-08-31 21:03:26,962 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:03:26" (1/1) ... [2023-08-31 21:03:26,963 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:03:26" (1/1) ... [2023-08-31 21:03:26,977 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:03:26" (1/1) ... [2023-08-31 21:03:26,982 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:03:26" (1/1) ... [2023-08-31 21:03:26,985 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:03:26" (1/1) ... [2023-08-31 21:03:26,986 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:03:26" (1/1) ... [2023-08-31 21:03:26,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 21:03:26,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 21:03:26,991 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 21:03:26,991 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 21:03:26,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:03:26" (1/1) ... [2023-08-31 21:03:26,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 21:03:27,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:03:27,036 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 21:03:27,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 21:03:27,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 21:03:27,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 21:03:27,076 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 21:03:27,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 21:03:27,076 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-31 21:03:27,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 21:03:27,076 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-31 21:03:27,076 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-31 21:03:27,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 21:03:27,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 21:03:27,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 21:03:27,078 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 21:03:27,278 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 21:03:27,284 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 21:03:27,769 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 21:03:27,783 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 21:03:27,784 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-08-31 21:03:27,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 09:03:27 BoogieIcfgContainer [2023-08-31 21:03:27,787 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 21:03:27,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 21:03:27,789 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 21:03:27,791 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 21:03:27,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 09:03:26" (1/3) ... [2023-08-31 21:03:27,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61f67a0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 09:03:27, skipping insertion in model container [2023-08-31 21:03:27,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:03:26" (2/3) ... [2023-08-31 21:03:27,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61f67a0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 09:03:27, skipping insertion in model container [2023-08-31 21:03:27,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 09:03:27" (3/3) ... [2023-08-31 21:03:27,794 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_77-tricky_address4_racing.i [2023-08-31 21:03:27,801 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 21:03:27,810 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 21:03:27,810 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-08-31 21:03:27,810 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 21:03:27,940 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-31 21:03:27,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 265 transitions, 538 flow [2023-08-31 21:03:28,146 INFO L130 PetriNetUnfolder]: 45/374 cut-off events. [2023-08-31 21:03:28,147 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2023-08-31 21:03:28,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380 conditions, 374 events. 45/374 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1491 event pairs, 0 based on Foata normal form. 0/309 useless extension candidates. Maximal degree in co-relation 218. Up to 8 conditions per place. [2023-08-31 21:03:28,157 INFO L82 GeneralOperation]: Start removeDead. Operand has 237 places, 265 transitions, 538 flow [2023-08-31 21:03:28,167 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 233 places, 260 transitions, 525 flow [2023-08-31 21:03:28,171 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 21:03:28,187 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 233 places, 260 transitions, 525 flow [2023-08-31 21:03:28,190 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 233 places, 260 transitions, 525 flow [2023-08-31 21:03:28,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 233 places, 260 transitions, 525 flow [2023-08-31 21:03:28,255 INFO L130 PetriNetUnfolder]: 44/369 cut-off events. [2023-08-31 21:03:28,256 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 21:03:28,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 369 events. 44/369 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1419 event pairs, 0 based on Foata normal form. 0/304 useless extension candidates. Maximal degree in co-relation 218. Up to 8 conditions per place. [2023-08-31 21:03:28,275 INFO L119 LiptonReduction]: Number of co-enabled transitions 23920 [2023-08-31 21:03:31,091 INFO L134 LiptonReduction]: Checked pairs total: 82732 [2023-08-31 21:03:31,092 INFO L136 LiptonReduction]: Total number of compositions: 159 [2023-08-31 21:03:31,104 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 21:03:31,110 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;@47331503, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 21:03:31,110 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 21:03:31,115 INFO L130 PetriNetUnfolder]: 5/29 cut-off events. [2023-08-31 21:03:31,115 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 21:03:31,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:03:31,116 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-31 21:03:31,116 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:03:31,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:03:31,121 INFO L85 PathProgramCache]: Analyzing trace with hash 679098008, now seen corresponding path program 1 times [2023-08-31 21:03:31,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:03:31,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292855509] [2023-08-31 21:03:31,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:03:31,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:03:31,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:03:31,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 21:03:31,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:03:31,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292855509] [2023-08-31 21:03:31,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292855509] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 21:03:31,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 21:03:31,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 21:03:31,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227345716] [2023-08-31 21:03:31,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 21:03:31,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 21:03:31,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:03:31,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 21:03:31,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 21:03:31,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 424 [2023-08-31 21:03:31,409 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 129 transitions, 263 flow. Second operand has 3 states, 3 states have (on average 231.66666666666666) internal successors, (695), 3 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:31,410 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:03:31,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 424 [2023-08-31 21:03:31,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:03:31,662 INFO L130 PetriNetUnfolder]: 380/1485 cut-off events. [2023-08-31 21:03:31,662 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 21:03:31,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2233 conditions, 1485 events. 380/1485 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 10412 event pairs, 340 based on Foata normal form. 141/1487 useless extension candidates. Maximal degree in co-relation 2140. Up to 741 conditions per place. [2023-08-31 21:03:31,667 INFO L137 encePairwiseOnDemand]: 400/424 looper letters, 23 selfloop transitions, 2 changer transitions 53/109 dead transitions. [2023-08-31 21:03:31,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 109 transitions, 307 flow [2023-08-31 21:03:31,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 21:03:31,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 21:03:31,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 754 transitions. [2023-08-31 21:03:31,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5927672955974843 [2023-08-31 21:03:31,688 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 754 transitions. [2023-08-31 21:03:31,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 754 transitions. [2023-08-31 21:03:31,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:03:31,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 754 transitions. [2023-08-31 21:03:31,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 251.33333333333334) internal successors, (754), 3 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:31,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 424.0) internal successors, (1696), 4 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:31,710 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 424.0) internal successors, (1696), 4 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:31,735 INFO L175 Difference]: Start difference. First operand has 109 places, 129 transitions, 263 flow. Second operand 3 states and 754 transitions. [2023-08-31 21:03:31,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 109 transitions, 307 flow [2023-08-31 21:03:31,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 109 transitions, 307 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 21:03:31,742 INFO L231 Difference]: Finished difference. Result has 111 places, 56 transitions, 127 flow [2023-08-31 21:03:31,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=111, PETRI_TRANSITIONS=56} [2023-08-31 21:03:31,747 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, 2 predicate places. [2023-08-31 21:03:31,747 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 56 transitions, 127 flow [2023-08-31 21:03:31,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 231.66666666666666) internal successors, (695), 3 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:31,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:03:31,748 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-31 21:03:31,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 21:03:31,749 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:03:31,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:03:31,758 INFO L85 PathProgramCache]: Analyzing trace with hash -634719318, now seen corresponding path program 1 times [2023-08-31 21:03:31,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:03:31,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499051343] [2023-08-31 21:03:31,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:03:31,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:03:31,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:03:31,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 21:03:31,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:03:31,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499051343] [2023-08-31 21:03:31,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499051343] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 21:03:31,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130687844] [2023-08-31 21:03:31,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:03:31,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:03:31,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:03:31,865 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 21:03:31,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 21:03:31,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:03:31,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 21:03:31,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 21:03:32,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 21:03:32,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 21:03:32,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 21:03:32,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130687844] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 21:03:32,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 21:03:32,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 21:03:32,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811156782] [2023-08-31 21:03:32,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 21:03:32,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 21:03:32,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:03:32,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 21:03:32,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 21:03:32,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 424 [2023-08-31 21:03:32,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 56 transitions, 127 flow. Second operand has 7 states, 7 states have (on average 230.57142857142858) internal successors, (1614), 7 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:32,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:03:32,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 424 [2023-08-31 21:03:32,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:03:32,145 INFO L130 PetriNetUnfolder]: 56/254 cut-off events. [2023-08-31 21:03:32,146 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 21:03:32,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 254 events. 56/254 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 881 event pairs, 51 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 391. Up to 129 conditions per place. [2023-08-31 21:03:32,147 INFO L137 encePairwiseOnDemand]: 421/424 looper letters, 23 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2023-08-31 21:03:32,147 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 59 transitions, 195 flow [2023-08-31 21:03:32,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 21:03:32,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 21:03:32,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1405 transitions. [2023-08-31 21:03:32,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5522798742138365 [2023-08-31 21:03:32,151 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1405 transitions. [2023-08-31 21:03:32,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1405 transitions. [2023-08-31 21:03:32,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:03:32,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1405 transitions. [2023-08-31 21:03:32,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 234.16666666666666) internal successors, (1405), 6 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:32,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 424.0) internal successors, (2968), 7 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:32,161 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 424.0) internal successors, (2968), 7 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:32,161 INFO L175 Difference]: Start difference. First operand has 111 places, 56 transitions, 127 flow. Second operand 6 states and 1405 transitions. [2023-08-31 21:03:32,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 59 transitions, 195 flow [2023-08-31 21:03:32,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 59 transitions, 191 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 21:03:32,163 INFO L231 Difference]: Finished difference. Result has 66 places, 59 transitions, 159 flow [2023-08-31 21:03:32,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=159, PETRI_PLACES=66, PETRI_TRANSITIONS=59} [2023-08-31 21:03:32,164 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -43 predicate places. [2023-08-31 21:03:32,164 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 59 transitions, 159 flow [2023-08-31 21:03:32,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 230.57142857142858) internal successors, (1614), 7 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:32,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:03:32,166 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-08-31 21:03:32,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 21:03:32,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:03:32,374 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:03:32,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:03:32,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1833560856, now seen corresponding path program 2 times [2023-08-31 21:03:32,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:03:32,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018119996] [2023-08-31 21:03:32,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:03:32,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:03:32,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:03:32,484 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 21:03:32,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:03:32,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018119996] [2023-08-31 21:03:32,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018119996] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 21:03:32,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921532507] [2023-08-31 21:03:32,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 21:03:32,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:03:32,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:03:32,489 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 21:03:32,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 21:03:32,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 21:03:32,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 21:03:32,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 21:03:32,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 21:03:32,613 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 21:03:32,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 21:03:32,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 21:03:32,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921532507] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 21:03:32,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 21:03:32,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-31 21:03:32,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192629737] [2023-08-31 21:03:32,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 21:03:32,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 21:03:32,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:03:32,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 21:03:32,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-31 21:03:32,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 424 [2023-08-31 21:03:32,714 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 59 transitions, 159 flow. Second operand has 13 states, 13 states have (on average 230.30769230769232) internal successors, (2994), 13 states have internal predecessors, (2994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:32,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:03:32,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 424 [2023-08-31 21:03:32,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:03:32,815 INFO L130 PetriNetUnfolder]: 56/260 cut-off events. [2023-08-31 21:03:32,816 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-08-31 21:03:32,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 440 conditions, 260 events. 56/260 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 881 event pairs, 51 based on Foata normal form. 6/235 useless extension candidates. Maximal degree in co-relation 382. Up to 129 conditions per place. [2023-08-31 21:03:32,817 INFO L137 encePairwiseOnDemand]: 421/424 looper letters, 23 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2023-08-31 21:03:32,817 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 65 transitions, 263 flow [2023-08-31 21:03:32,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 21:03:32,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 21:03:32,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2788 transitions. [2023-08-31 21:03:32,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5479559748427673 [2023-08-31 21:03:32,824 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2788 transitions. [2023-08-31 21:03:32,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2788 transitions. [2023-08-31 21:03:32,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:03:32,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2788 transitions. [2023-08-31 21:03:32,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 232.33333333333334) internal successors, (2788), 12 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:32,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 424.0) internal successors, (5512), 13 states have internal predecessors, (5512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:32,843 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 424.0) internal successors, (5512), 13 states have internal predecessors, (5512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:32,844 INFO L175 Difference]: Start difference. First operand has 66 places, 59 transitions, 159 flow. Second operand 12 states and 2788 transitions. [2023-08-31 21:03:32,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 65 transitions, 263 flow [2023-08-31 21:03:32,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 65 transitions, 249 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-31 21:03:32,847 INFO L231 Difference]: Finished difference. Result has 82 places, 65 transitions, 229 flow [2023-08-31 21:03:32,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=229, PETRI_PLACES=82, PETRI_TRANSITIONS=65} [2023-08-31 21:03:32,848 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -27 predicate places. [2023-08-31 21:03:32,848 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 65 transitions, 229 flow [2023-08-31 21:03:32,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 230.30769230769232) internal successors, (2994), 13 states have internal predecessors, (2994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:32,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:03:32,850 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-31 21:03:32,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-31 21:03:33,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-31 21:03:33,055 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:03:33,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:03:33,055 INFO L85 PathProgramCache]: Analyzing trace with hash 815579608, now seen corresponding path program 3 times [2023-08-31 21:03:33,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:03:33,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521009196] [2023-08-31 21:03:33,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:03:33,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:03:33,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:03:33,112 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 21:03:33,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:03:33,169 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 21:03:33,169 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 21:03:33,170 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 21:03:33,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 21:03:33,172 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-31 21:03:33,174 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 21:03:33,174 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 21:03:33,175 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-31 21:03:33,232 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 21:03:33,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 331 places, 371 transitions, 760 flow [2023-08-31 21:03:33,330 INFO L130 PetriNetUnfolder]: 75/619 cut-off events. [2023-08-31 21:03:33,331 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-08-31 21:03:33,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 633 conditions, 619 events. 75/619 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3067 event pairs, 0 based on Foata normal form. 0/511 useless extension candidates. Maximal degree in co-relation 376. Up to 12 conditions per place. [2023-08-31 21:03:33,340 INFO L82 GeneralOperation]: Start removeDead. Operand has 331 places, 371 transitions, 760 flow [2023-08-31 21:03:33,346 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 331 places, 371 transitions, 760 flow [2023-08-31 21:03:33,346 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 21:03:33,346 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 331 places, 371 transitions, 760 flow [2023-08-31 21:03:33,347 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 331 places, 371 transitions, 760 flow [2023-08-31 21:03:33,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 331 places, 371 transitions, 760 flow [2023-08-31 21:03:33,445 INFO L130 PetriNetUnfolder]: 75/619 cut-off events. [2023-08-31 21:03:33,445 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-08-31 21:03:33,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 633 conditions, 619 events. 75/619 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3067 event pairs, 0 based on Foata normal form. 0/511 useless extension candidates. Maximal degree in co-relation 376. Up to 12 conditions per place. [2023-08-31 21:03:33,482 INFO L119 LiptonReduction]: Number of co-enabled transitions 71760 [2023-08-31 21:03:36,914 INFO L134 LiptonReduction]: Checked pairs total: 253106 [2023-08-31 21:03:36,914 INFO L136 LiptonReduction]: Total number of compositions: 226 [2023-08-31 21:03:36,916 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 21:03:36,917 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;@47331503, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 21:03:36,917 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 21:03:36,925 INFO L130 PetriNetUnfolder]: 21/113 cut-off events. [2023-08-31 21:03:36,926 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 21:03:36,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:03:36,926 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-31 21:03:36,926 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:03:36,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:03:36,927 INFO L85 PathProgramCache]: Analyzing trace with hash 56253825, now seen corresponding path program 1 times [2023-08-31 21:03:36,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:03:36,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580815420] [2023-08-31 21:03:36,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:03:36,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:03:36,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:03:36,953 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 21:03:36,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:03:36,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580815420] [2023-08-31 21:03:36,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580815420] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 21:03:36,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 21:03:36,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 21:03:36,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489275419] [2023-08-31 21:03:36,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 21:03:36,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 21:03:36,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:03:36,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 21:03:36,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 21:03:36,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 597 [2023-08-31 21:03:36,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 193 transitions, 404 flow. Second operand has 3 states, 3 states have (on average 323.0) internal successors, (969), 3 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:36,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:03:36,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 597 [2023-08-31 21:03:36,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:03:40,357 INFO L130 PetriNetUnfolder]: 14691/34824 cut-off events. [2023-08-31 21:03:40,357 INFO L131 PetriNetUnfolder]: For 206/254 co-relation queries the response was YES. [2023-08-31 21:03:40,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56201 conditions, 34824 events. 14691/34824 cut-off events. For 206/254 co-relation queries the response was YES. Maximal size of possible extension queue 891. Compared 375817 event pairs, 13600 based on Foata normal form. 4205/35780 useless extension candidates. Maximal degree in co-relation 20590. Up to 21259 conditions per place. [2023-08-31 21:03:40,478 INFO L137 encePairwiseOnDemand]: 563/597 looper letters, 41 selfloop transitions, 2 changer transitions 58/163 dead transitions. [2023-08-31 21:03:40,479 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 163 transitions, 472 flow [2023-08-31 21:03:40,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 21:03:40,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 21:03:40,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1059 transitions. [2023-08-31 21:03:40,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912897822445561 [2023-08-31 21:03:40,482 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1059 transitions. [2023-08-31 21:03:40,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1059 transitions. [2023-08-31 21:03:40,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:03:40,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1059 transitions. [2023-08-31 21:03:40,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 353.0) internal successors, (1059), 3 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:40,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:40,488 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:40,489 INFO L175 Difference]: Start difference. First operand has 161 places, 193 transitions, 404 flow. Second operand 3 states and 1059 transitions. [2023-08-31 21:03:40,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 163 transitions, 472 flow [2023-08-31 21:03:40,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 163 transitions, 472 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 21:03:40,496 INFO L231 Difference]: Finished difference. Result has 164 places, 105 transitions, 232 flow [2023-08-31 21:03:40,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=164, PETRI_TRANSITIONS=105} [2023-08-31 21:03:40,498 INFO L281 CegarLoopForPetriNet]: 161 programPoint places, 3 predicate places. [2023-08-31 21:03:40,499 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 105 transitions, 232 flow [2023-08-31 21:03:40,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 323.0) internal successors, (969), 3 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:40,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:03:40,500 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-31 21:03:40,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 21:03:40,500 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:03:40,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:03:40,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1039024662, now seen corresponding path program 1 times [2023-08-31 21:03:40,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:03:40,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50522472] [2023-08-31 21:03:40,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:03:40,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:03:40,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:03:40,563 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 21:03:40,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:03:40,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50522472] [2023-08-31 21:03:40,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50522472] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 21:03:40,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714713192] [2023-08-31 21:03:40,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:03:40,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:03:40,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:03:40,567 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 21:03:40,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 21:03:40,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:03:40,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 21:03:40,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 21:03:40,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 21:03:40,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 21:03:40,664 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 21:03:40,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714713192] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 21:03:40,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 21:03:40,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 21:03:40,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372709709] [2023-08-31 21:03:40,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 21:03:40,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 21:03:40,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:03:40,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 21:03:40,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 21:03:40,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 597 [2023-08-31 21:03:40,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 105 transitions, 232 flow. Second operand has 7 states, 7 states have (on average 321.7142857142857) internal successors, (2252), 7 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:40,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:03:40,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 597 [2023-08-31 21:03:40,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:03:41,278 INFO L130 PetriNetUnfolder]: 2338/5891 cut-off events. [2023-08-31 21:03:41,278 INFO L131 PetriNetUnfolder]: For 62/62 co-relation queries the response was YES. [2023-08-31 21:03:41,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9551 conditions, 5891 events. 2338/5891 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 48254 event pairs, 2193 based on Foata normal form. 0/5246 useless extension candidates. Maximal degree in co-relation 9538. Up to 3567 conditions per place. [2023-08-31 21:03:41,313 INFO L137 encePairwiseOnDemand]: 594/597 looper letters, 41 selfloop transitions, 5 changer transitions 0/108 dead transitions. [2023-08-31 21:03:41,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 108 transitions, 336 flow [2023-08-31 21:03:41,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 21:03:41,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 21:03:41,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1969 transitions. [2023-08-31 21:03:41,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5496929089893914 [2023-08-31 21:03:41,329 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1969 transitions. [2023-08-31 21:03:41,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1969 transitions. [2023-08-31 21:03:41,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:03:41,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1969 transitions. [2023-08-31 21:03:41,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 328.1666666666667) internal successors, (1969), 6 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:41,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 597.0) internal successors, (4179), 7 states have internal predecessors, (4179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:41,345 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 597.0) internal successors, (4179), 7 states have internal predecessors, (4179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:41,345 INFO L175 Difference]: Start difference. First operand has 164 places, 105 transitions, 232 flow. Second operand 6 states and 1969 transitions. [2023-08-31 21:03:41,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 108 transitions, 336 flow [2023-08-31 21:03:41,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 108 transitions, 330 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-31 21:03:41,349 INFO L231 Difference]: Finished difference. Result has 116 places, 108 transitions, 262 flow [2023-08-31 21:03:41,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=262, PETRI_PLACES=116, PETRI_TRANSITIONS=108} [2023-08-31 21:03:41,353 INFO L281 CegarLoopForPetriNet]: 161 programPoint places, -45 predicate places. [2023-08-31 21:03:41,354 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 108 transitions, 262 flow [2023-08-31 21:03:41,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 321.7142857142857) internal successors, (2252), 7 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:41,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:03:41,355 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-31 21:03:41,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 21:03:41,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:03:41,561 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:03:41,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:03:41,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1503416383, now seen corresponding path program 2 times [2023-08-31 21:03:41,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:03:41,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123332247] [2023-08-31 21:03:41,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:03:41,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:03:41,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:03:41,676 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 21:03:41,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:03:41,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123332247] [2023-08-31 21:03:41,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123332247] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 21:03:41,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500623526] [2023-08-31 21:03:41,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 21:03:41,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:03:41,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:03:41,678 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 21:03:41,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 21:03:41,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 21:03:41,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 21:03:41,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 21:03:41,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 21:03:41,771 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 21:03:41,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 21:03:41,816 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 21:03:41,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500623526] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 21:03:41,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 21:03:41,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-31 21:03:41,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203147000] [2023-08-31 21:03:41,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 21:03:41,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 21:03:41,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:03:41,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 21:03:41,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-31 21:03:41,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 597 [2023-08-31 21:03:41,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 108 transitions, 262 flow. Second operand has 13 states, 13 states have (on average 321.38461538461536) internal successors, (4178), 13 states have internal predecessors, (4178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:41,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:03:41,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 597 [2023-08-31 21:03:41,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:03:42,484 INFO L130 PetriNetUnfolder]: 2338/5897 cut-off events. [2023-08-31 21:03:42,484 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2023-08-31 21:03:42,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9578 conditions, 5897 events. 2338/5897 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 48264 event pairs, 2193 based on Foata normal form. 6/5259 useless extension candidates. Maximal degree in co-relation 9519. Up to 3567 conditions per place. [2023-08-31 21:03:42,513 INFO L137 encePairwiseOnDemand]: 594/597 looper letters, 41 selfloop transitions, 11 changer transitions 0/114 dead transitions. [2023-08-31 21:03:42,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 114 transitions, 402 flow [2023-08-31 21:03:42,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 21:03:42,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 21:03:42,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3898 transitions. [2023-08-31 21:03:42,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5441094360692351 [2023-08-31 21:03:42,524 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3898 transitions. [2023-08-31 21:03:42,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3898 transitions. [2023-08-31 21:03:42,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:03:42,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3898 transitions. [2023-08-31 21:03:42,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 324.8333333333333) internal successors, (3898), 12 states have internal predecessors, (3898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:42,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 597.0) internal successors, (7761), 13 states have internal predecessors, (7761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:42,547 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 597.0) internal successors, (7761), 13 states have internal predecessors, (7761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:42,547 INFO L175 Difference]: Start difference. First operand has 116 places, 108 transitions, 262 flow. Second operand 12 states and 3898 transitions. [2023-08-31 21:03:42,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 114 transitions, 402 flow [2023-08-31 21:03:42,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 114 transitions, 388 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-31 21:03:42,550 INFO L231 Difference]: Finished difference. Result has 132 places, 114 transitions, 332 flow [2023-08-31 21:03:42,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=332, PETRI_PLACES=132, PETRI_TRANSITIONS=114} [2023-08-31 21:03:42,551 INFO L281 CegarLoopForPetriNet]: 161 programPoint places, -29 predicate places. [2023-08-31 21:03:42,551 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 114 transitions, 332 flow [2023-08-31 21:03:42,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 321.38461538461536) internal successors, (4178), 13 states have internal predecessors, (4178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:42,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:03:42,553 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-31 21:03:42,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 21:03:42,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:03:42,759 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:03:42,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:03:42,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1360449313, now seen corresponding path program 3 times [2023-08-31 21:03:42,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:03:42,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269343396] [2023-08-31 21:03:42,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:03:42,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:03:42,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:03:42,805 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 21:03:42,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:03:42,832 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 21:03:42,833 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 21:03:42,833 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 21:03:42,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 21:03:42,833 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-31 21:03:42,834 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 21:03:42,834 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 21:03:42,834 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-31 21:03:42,895 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 21:03:42,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 425 places, 477 transitions, 984 flow [2023-08-31 21:03:43,073 INFO L130 PetriNetUnfolder]: 110/907 cut-off events. [2023-08-31 21:03:43,074 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-08-31 21:03:43,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 935 conditions, 907 events. 110/907 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4958 event pairs, 1 based on Foata normal form. 0/750 useless extension candidates. Maximal degree in co-relation 627. Up to 16 conditions per place. [2023-08-31 21:03:43,095 INFO L82 GeneralOperation]: Start removeDead. Operand has 425 places, 477 transitions, 984 flow [2023-08-31 21:03:43,104 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 425 places, 477 transitions, 984 flow [2023-08-31 21:03:43,104 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 21:03:43,104 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 425 places, 477 transitions, 984 flow [2023-08-31 21:03:43,105 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 425 places, 477 transitions, 984 flow [2023-08-31 21:03:43,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 425 places, 477 transitions, 984 flow [2023-08-31 21:03:43,272 INFO L130 PetriNetUnfolder]: 110/907 cut-off events. [2023-08-31 21:03:43,272 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-08-31 21:03:43,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 935 conditions, 907 events. 110/907 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4958 event pairs, 1 based on Foata normal form. 0/750 useless extension candidates. Maximal degree in co-relation 627. Up to 16 conditions per place. [2023-08-31 21:03:43,332 INFO L119 LiptonReduction]: Number of co-enabled transitions 141024 [2023-08-31 21:03:47,294 INFO L134 LiptonReduction]: Checked pairs total: 569520 [2023-08-31 21:03:47,294 INFO L136 LiptonReduction]: Total number of compositions: 294 [2023-08-31 21:03:47,296 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 21:03:47,296 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;@47331503, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 21:03:47,296 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 21:03:47,312 INFO L130 PetriNetUnfolder]: 35/209 cut-off events. [2023-08-31 21:03:47,312 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-31 21:03:47,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:03:47,312 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-31 21:03:47,313 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:03:47,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:03:47,313 INFO L85 PathProgramCache]: Analyzing trace with hash -2101503650, now seen corresponding path program 1 times [2023-08-31 21:03:47,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:03:47,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480173365] [2023-08-31 21:03:47,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:03:47,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:03:47,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:03:47,342 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-31 21:03:47,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:03:47,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480173365] [2023-08-31 21:03:47,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480173365] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 21:03:47,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 21:03:47,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 21:03:47,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351206826] [2023-08-31 21:03:47,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 21:03:47,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 21:03:47,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:03:47,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 21:03:47,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 21:03:47,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 412 out of 771 [2023-08-31 21:03:47,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 252 transitions, 534 flow. Second operand has 3 states, 3 states have (on average 414.3333333333333) internal successors, (1243), 3 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:03:47,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:03:47,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 412 of 771 [2023-08-31 21:03:47,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:04:52,969 INFO L130 PetriNetUnfolder]: 403445/757641 cut-off events. [2023-08-31 21:04:52,969 INFO L131 PetriNetUnfolder]: For 5874/7267 co-relation queries the response was YES. [2023-08-31 21:04:55,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1276847 conditions, 757641 events. 403445/757641 cut-off events. For 5874/7267 co-relation queries the response was YES. Maximal size of possible extension queue 15346. Compared 9853132 event pairs, 377214 based on Foata normal form. 106216/794626 useless extension candidates. Maximal degree in co-relation 226808. Up to 516526 conditions per place. [2023-08-31 21:04:56,206 INFO L137 encePairwiseOnDemand]: 727/771 looper letters, 59 selfloop transitions, 2 changer transitions 59/212 dead transitions. [2023-08-31 21:04:56,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 212 transitions, 620 flow [2023-08-31 21:04:56,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 21:04:56,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 21:04:56,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1361 transitions. [2023-08-31 21:04:56,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884133160397752 [2023-08-31 21:04:56,210 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1361 transitions. [2023-08-31 21:04:56,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1361 transitions. [2023-08-31 21:04:56,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:04:56,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1361 transitions. [2023-08-31 21:04:56,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 453.6666666666667) internal successors, (1361), 3 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:04:56,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 771.0) internal successors, (3084), 4 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:04:56,218 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 771.0) internal successors, (3084), 4 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:04:56,218 INFO L175 Difference]: Start difference. First operand has 210 places, 252 transitions, 534 flow. Second operand 3 states and 1361 transitions. [2023-08-31 21:04:56,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 212 transitions, 620 flow [2023-08-31 21:04:56,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 212 transitions, 620 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 21:04:56,225 INFO L231 Difference]: Finished difference. Result has 213 places, 153 transitions, 337 flow [2023-08-31 21:04:56,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=337, PETRI_PLACES=213, PETRI_TRANSITIONS=153} [2023-08-31 21:04:56,226 INFO L281 CegarLoopForPetriNet]: 210 programPoint places, 3 predicate places. [2023-08-31 21:04:56,226 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 153 transitions, 337 flow [2023-08-31 21:04:56,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 414.3333333333333) internal successors, (1243), 3 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:04:56,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:04:56,227 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 21:04:56,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 21:04:56,227 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:04:56,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:04:56,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1243872177, now seen corresponding path program 1 times [2023-08-31 21:04:56,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:04:56,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359382329] [2023-08-31 21:04:56,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:04:56,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:04:56,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:04:56,261 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-31 21:04:56,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:04:56,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359382329] [2023-08-31 21:04:56,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359382329] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 21:04:56,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056666562] [2023-08-31 21:04:56,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:04:56,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:04:56,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:04:56,269 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 21:04:56,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 21:04:56,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:04:56,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 21:04:56,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 21:04:56,376 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-31 21:04:56,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 21:04:56,388 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-31 21:04:56,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056666562] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 21:04:56,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 21:04:56,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 21:04:56,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657315095] [2023-08-31 21:04:56,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 21:04:56,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 21:04:56,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:04:56,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 21:04:56,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 21:04:56,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 411 out of 771 [2023-08-31 21:04:56,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 153 transitions, 337 flow. Second operand has 7 states, 7 states have (on average 412.85714285714283) internal successors, (2890), 7 states have internal predecessors, (2890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:04:56,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:04:56,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 411 of 771 [2023-08-31 21:04:56,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:05:05,668 INFO L130 PetriNetUnfolder]: 66602/129303 cut-off events. [2023-08-31 21:05:05,668 INFO L131 PetriNetUnfolder]: For 2212/2212 co-relation queries the response was YES. [2023-08-31 21:05:06,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218396 conditions, 129303 events. 66602/129303 cut-off events. For 2212/2212 co-relation queries the response was YES. Maximal size of possible extension queue 2866. Compared 1427018 event pairs, 62781 based on Foata normal form. 0/115096 useless extension candidates. Maximal degree in co-relation 218382. Up to 87483 conditions per place. [2023-08-31 21:05:06,318 INFO L137 encePairwiseOnDemand]: 768/771 looper letters, 59 selfloop transitions, 5 changer transitions 0/156 dead transitions. [2023-08-31 21:05:06,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 156 transitions, 477 flow [2023-08-31 21:05:06,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 21:05:06,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 21:05:06,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2533 transitions. [2023-08-31 21:05:06,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5475572849113706 [2023-08-31 21:05:06,324 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2533 transitions. [2023-08-31 21:05:06,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2533 transitions. [2023-08-31 21:05:06,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:05:06,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2533 transitions. [2023-08-31 21:05:06,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 422.1666666666667) internal successors, (2533), 6 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:05:06,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 771.0) internal successors, (5397), 7 states have internal predecessors, (5397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:05:06,336 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 771.0) internal successors, (5397), 7 states have internal predecessors, (5397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:05:06,336 INFO L175 Difference]: Start difference. First operand has 213 places, 153 transitions, 337 flow. Second operand 6 states and 2533 transitions. [2023-08-31 21:05:06,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 156 transitions, 477 flow [2023-08-31 21:05:06,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 156 transitions, 467 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-31 21:05:06,340 INFO L231 Difference]: Finished difference. Result has 165 places, 156 transitions, 363 flow [2023-08-31 21:05:06,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=363, PETRI_PLACES=165, PETRI_TRANSITIONS=156} [2023-08-31 21:05:06,341 INFO L281 CegarLoopForPetriNet]: 210 programPoint places, -45 predicate places. [2023-08-31 21:05:06,341 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 156 transitions, 363 flow [2023-08-31 21:05:06,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 412.85714285714283) internal successors, (2890), 7 states have internal predecessors, (2890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:05:06,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:05:06,342 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-31 21:05:06,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 21:05:06,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-31 21:05:06,743 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:05:06,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:05:06,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1938207330, now seen corresponding path program 2 times [2023-08-31 21:05:06,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:05:06,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337376317] [2023-08-31 21:05:06,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:05:06,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:05:06,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:05:06,829 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-31 21:05:06,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:05:06,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337376317] [2023-08-31 21:05:06,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337376317] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 21:05:06,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401191544] [2023-08-31 21:05:06,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 21:05:06,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:05:06,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:05:06,831 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 21:05:06,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 21:05:06,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 21:05:06,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 21:05:06,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 21:05:06,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 21:05:06,958 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-31 21:05:06,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 21:05:07,009 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-31 21:05:07,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401191544] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 21:05:07,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 21:05:07,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-31 21:05:07,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797884490] [2023-08-31 21:05:07,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 21:05:07,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 21:05:07,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:05:07,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 21:05:07,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-31 21:05:07,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 411 out of 771 [2023-08-31 21:05:07,043 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 156 transitions, 363 flow. Second operand has 13 states, 13 states have (on average 412.46153846153845) internal successors, (5362), 13 states have internal predecessors, (5362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:05:07,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:05:07,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 411 of 771 [2023-08-31 21:05:07,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:05:17,074 INFO L130 PetriNetUnfolder]: 66602/129309 cut-off events. [2023-08-31 21:05:17,074 INFO L131 PetriNetUnfolder]: For 1028/1028 co-relation queries the response was YES. [2023-08-31 21:05:17,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217949 conditions, 129309 events. 66602/129309 cut-off events. For 1028/1028 co-relation queries the response was YES. Maximal size of possible extension queue 2866. Compared 1426650 event pairs, 62781 based on Foata normal form. 6/115109 useless extension candidates. Maximal degree in co-relation 217889. Up to 87483 conditions per place. [2023-08-31 21:05:17,762 INFO L137 encePairwiseOnDemand]: 768/771 looper letters, 59 selfloop transitions, 11 changer transitions 0/162 dead transitions. [2023-08-31 21:05:17,763 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 162 transitions, 539 flow [2023-08-31 21:05:17,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 21:05:17,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 21:05:17,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 5008 transitions. [2023-08-31 21:05:17,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5412883700821444 [2023-08-31 21:05:17,772 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 5008 transitions. [2023-08-31 21:05:17,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 5008 transitions. [2023-08-31 21:05:17,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:05:17,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 5008 transitions. [2023-08-31 21:05:17,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 417.3333333333333) internal successors, (5008), 12 states have internal predecessors, (5008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:05:17,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 771.0) internal successors, (10023), 13 states have internal predecessors, (10023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:05:17,794 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 771.0) internal successors, (10023), 13 states have internal predecessors, (10023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:05:17,794 INFO L175 Difference]: Start difference. First operand has 165 places, 156 transitions, 363 flow. Second operand 12 states and 5008 transitions. [2023-08-31 21:05:17,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 162 transitions, 539 flow [2023-08-31 21:05:17,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 162 transitions, 525 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-31 21:05:17,798 INFO L231 Difference]: Finished difference. Result has 181 places, 162 transitions, 433 flow [2023-08-31 21:05:17,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=433, PETRI_PLACES=181, PETRI_TRANSITIONS=162} [2023-08-31 21:05:17,799 INFO L281 CegarLoopForPetriNet]: 210 programPoint places, -29 predicate places. [2023-08-31 21:05:17,800 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 162 transitions, 433 flow [2023-08-31 21:05:17,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 412.46153846153845) internal successors, (5362), 13 states have internal predecessors, (5362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:05:17,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:05:17,801 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-31 21:05:17,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 21:05:18,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:05:18,012 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:05:18,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:05:18,012 INFO L85 PathProgramCache]: Analyzing trace with hash 484319230, now seen corresponding path program 3 times [2023-08-31 21:05:18,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:05:18,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804006102] [2023-08-31 21:05:18,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:05:18,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:05:18,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:05:18,041 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 21:05:18,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:05:18,085 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 21:05:18,085 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 21:05:18,086 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 21:05:18,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 21:05:18,086 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-31 21:05:18,088 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 21:05:18,088 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 21:05:18,088 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-31 21:05:18,158 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-31 21:05:18,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 519 places, 583 transitions, 1210 flow [2023-08-31 21:05:18,567 INFO L130 PetriNetUnfolder]: 157/1283 cut-off events. [2023-08-31 21:05:18,567 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-08-31 21:05:18,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1338 conditions, 1283 events. 157/1283 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 7533 event pairs, 6 based on Foata normal form. 0/1065 useless extension candidates. Maximal degree in co-relation 927. Up to 32 conditions per place. [2023-08-31 21:05:18,596 INFO L82 GeneralOperation]: Start removeDead. Operand has 519 places, 583 transitions, 1210 flow [2023-08-31 21:05:18,605 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 519 places, 583 transitions, 1210 flow [2023-08-31 21:05:18,605 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 21:05:18,605 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 519 places, 583 transitions, 1210 flow [2023-08-31 21:05:18,605 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 519 places, 583 transitions, 1210 flow [2023-08-31 21:05:18,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 519 places, 583 transitions, 1210 flow [2023-08-31 21:05:18,772 INFO L130 PetriNetUnfolder]: 157/1283 cut-off events. [2023-08-31 21:05:18,772 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-08-31 21:05:18,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1338 conditions, 1283 events. 157/1283 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 7533 event pairs, 6 based on Foata normal form. 0/1065 useless extension candidates. Maximal degree in co-relation 927. Up to 32 conditions per place. [2023-08-31 21:05:18,899 INFO L119 LiptonReduction]: Number of co-enabled transitions 232544 [2023-08-31 21:05:23,572 INFO L134 LiptonReduction]: Checked pairs total: 934670 [2023-08-31 21:05:23,572 INFO L136 LiptonReduction]: Total number of compositions: 349 [2023-08-31 21:05:23,574 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 21:05:23,574 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;@47331503, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 21:05:23,574 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 21:05:23,595 INFO L130 PetriNetUnfolder]: 57/344 cut-off events. [2023-08-31 21:05:23,595 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 21:05:23,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:05:23,595 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 21:05:23,596 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:05:23,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:05:23,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1769046141, now seen corresponding path program 1 times [2023-08-31 21:05:23,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:05:23,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911633597] [2023-08-31 21:05:23,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:05:23,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:05:23,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:05:23,623 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-31 21:05:23,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:05:23,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911633597] [2023-08-31 21:05:23,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911633597] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 21:05:23,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 21:05:23,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 21:05:23,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941459149] [2023-08-31 21:05:23,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 21:05:23,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 21:05:23,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:05:23,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 21:05:23,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 21:05:23,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 503 out of 932 [2023-08-31 21:05:23,635 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 314 transitions, 672 flow. Second operand has 3 states, 3 states have (on average 505.6666666666667) internal successors, (1517), 3 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:05:23,635 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:05:23,635 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 503 of 932 [2023-08-31 21:05:23,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand