./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-data-race.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_74-tricky_address1_racefree.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_74-tricky_address1_racefree.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 9a7db49c8892594e32a30fa9165fc3ad1a94911917cd8b63757bb8f24f04b536 --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 21:02:47,024 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 21:02:47,026 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 21:02:47,059 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 21:02:47,059 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 21:02:47,066 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 21:02:47,068 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 21:02:47,071 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 21:02:47,073 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 21:02:47,077 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 21:02:47,078 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 21:02:47,080 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 21:02:47,081 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 21:02:47,083 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 21:02:47,084 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 21:02:47,087 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 21:02:47,088 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 21:02:47,089 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 21:02:47,093 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 21:02:47,094 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 21:02:47,097 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 21:02:47,098 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 21:02:47,100 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 21:02:47,101 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 21:02:47,105 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 21:02:47,108 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 21:02:47,108 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 21:02:47,109 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 21:02:47,110 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 21:02:47,111 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 21:02:47,113 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 21:02:47,114 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 21:02:47,115 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 21:02:47,115 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 21:02:47,116 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 21:02:47,116 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 21:02:47,117 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 21:02:47,118 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 21:02:47,118 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 21:02:47,118 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 21:02:47,119 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 21:02:47,120 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-32bit-Automizer_Default.epf [2023-08-31 21:02:47,145 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 21:02:47,146 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 21:02:47,147 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 21:02:47,147 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 21:02:47,147 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 21:02:47,148 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 21:02:47,148 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 21:02:47,148 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 21:02:47,148 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 21:02:47,148 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 21:02:47,149 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 21:02:47,149 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 21:02:47,149 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 21:02:47,150 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 21:02:47,150 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 21:02:47,150 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 21:02:47,150 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 21:02:47,150 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 21:02:47,150 INFO L138 SettingsManager]: * Check absence of data races in concurrent programs=true [2023-08-31 21:02:47,150 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 21:02:47,150 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 21:02:47,151 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 21:02:47,151 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 21:02:47,151 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 21:02:47,151 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 21:02:47,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 21:02:47,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 21:02:47,152 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 21:02:47,152 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 21:02:47,152 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 21:02:47,152 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 21:02:47,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 21:02:47,152 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 21:02:47,153 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 21:02:47,153 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 21:02:47,153 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 21:02:47,153 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 21:02:47,153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a7db49c8892594e32a30fa9165fc3ad1a94911917cd8b63757bb8f24f04b536 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 21:02:47,424 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 21:02:47,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 21:02:47,447 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 21:02:47,448 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 21:02:47,448 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 21:02:47,449 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_74-tricky_address1_racefree.i [2023-08-31 21:02:48,419 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 21:02:48,669 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 21:02:48,675 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_74-tricky_address1_racefree.i [2023-08-31 21:02:48,692 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c38d3637/94fad0b0b2414551bc590bcc201b9180/FLAG30008d402 [2023-08-31 21:02:48,976 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c38d3637/94fad0b0b2414551bc590bcc201b9180 [2023-08-31 21:02:48,978 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 21:02:48,982 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 21:02:48,984 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 21:02:48,984 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 21:02:48,986 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 21:02:48,997 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 09:02:48" (1/1) ... [2023-08-31 21:02:48,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71867e74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:02:48, skipping insertion in model container [2023-08-31 21:02:49,000 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 09:02:48" (1/1) ... [2023-08-31 21:02:49,004 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 21:02:49,069 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 21:02:49,462 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_74-tricky_address1_racefree.i[41323,41336] [2023-08-31 21:02:49,494 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 21:02:49,509 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 21:02:49,538 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_74-tricky_address1_racefree.i[41323,41336] [2023-08-31 21:02:49,556 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 21:02:49,624 INFO L208 MainTranslator]: Completed translation [2023-08-31 21:02:49,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:02:49 WrapperNode [2023-08-31 21:02:49,624 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 21:02:49,625 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 21:02:49,625 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 21:02:49,625 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 21:02:49,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:02:49" (1/1) ... [2023-08-31 21:02:49,645 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:02:49" (1/1) ... [2023-08-31 21:02:49,666 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 253 [2023-08-31 21:02:49,666 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 21:02:49,666 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 21:02:49,667 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 21:02:49,667 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 21:02:49,672 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:02:49" (1/1) ... [2023-08-31 21:02:49,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:02:49" (1/1) ... [2023-08-31 21:02:49,675 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:02:49" (1/1) ... [2023-08-31 21:02:49,675 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:02:49" (1/1) ... [2023-08-31 21:02:49,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:02:49" (1/1) ... [2023-08-31 21:02:49,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:02:49" (1/1) ... [2023-08-31 21:02:49,688 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:02:49" (1/1) ... [2023-08-31 21:02:49,689 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:02:49" (1/1) ... [2023-08-31 21:02:49,691 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 21:02:49,692 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 21:02:49,692 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 21:02:49,692 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 21:02:49,693 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:02:49" (1/1) ... [2023-08-31 21:02:49,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 21:02:49,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:02:49,713 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 21:02:49,743 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 21:02:49,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 21:02:49,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 21:02:49,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 21:02:49,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 21:02:49,763 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-31 21:02:49,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 21:02:49,763 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-31 21:02:49,763 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-31 21:02:49,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 21:02:49,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 21:02:49,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 21:02:49,765 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 21:02:49,849 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 21:02:49,850 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 21:02:50,216 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 21:02:50,224 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 21:02:50,226 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-08-31 21:02:50,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 09:02:50 BoogieIcfgContainer [2023-08-31 21:02:50,229 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 21:02:50,230 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 21:02:50,230 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 21:02:50,232 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 21:02:50,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 09:02:48" (1/3) ... [2023-08-31 21:02:50,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@691ba2f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 09:02:50, skipping insertion in model container [2023-08-31 21:02:50,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:02:49" (2/3) ... [2023-08-31 21:02:50,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@691ba2f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 09:02:50, skipping insertion in model container [2023-08-31 21:02:50,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 09:02:50" (3/3) ... [2023-08-31 21:02:50,234 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_74-tricky_address1_racefree.i [2023-08-31 21:02:50,238 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 21:02:50,244 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 21:02:50,244 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-08-31 21:02:50,244 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 21:02:50,332 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-31 21:02:50,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 234 places, 262 transitions, 532 flow [2023-08-31 21:02:50,478 INFO L130 PetriNetUnfolder]: 45/371 cut-off events. [2023-08-31 21:02:50,479 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 21:02:50,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377 conditions, 371 events. 45/371 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1500 event pairs, 0 based on Foata normal form. 0/306 useless extension candidates. Maximal degree in co-relation 215. Up to 8 conditions per place. [2023-08-31 21:02:50,485 INFO L82 GeneralOperation]: Start removeDead. Operand has 234 places, 262 transitions, 532 flow [2023-08-31 21:02:50,492 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 230 places, 257 transitions, 519 flow [2023-08-31 21:02:50,497 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 21:02:50,508 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 230 places, 257 transitions, 519 flow [2023-08-31 21:02:50,510 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 230 places, 257 transitions, 519 flow [2023-08-31 21:02:50,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 257 transitions, 519 flow [2023-08-31 21:02:50,556 INFO L130 PetriNetUnfolder]: 44/366 cut-off events. [2023-08-31 21:02:50,556 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 21:02:50,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371 conditions, 366 events. 44/366 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1436 event pairs, 0 based on Foata normal form. 0/301 useless extension candidates. Maximal degree in co-relation 215. Up to 8 conditions per place. [2023-08-31 21:02:50,568 INFO L119 LiptonReduction]: Number of co-enabled transitions 23230 [2023-08-31 21:02:52,585 INFO L134 LiptonReduction]: Checked pairs total: 83117 [2023-08-31 21:02:52,585 INFO L136 LiptonReduction]: Total number of compositions: 159 [2023-08-31 21:02:52,596 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 21:02:52,600 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;@2403965a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 21:02:52,601 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 21:02:52,605 INFO L130 PetriNetUnfolder]: 5/29 cut-off events. [2023-08-31 21:02:52,605 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 21:02:52,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:02:52,606 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-31 21:02:52,606 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:02:52,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:02:52,610 INFO L85 PathProgramCache]: Analyzing trace with hash 338310698, now seen corresponding path program 1 times [2023-08-31 21:02:52,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:02:52,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037786095] [2023-08-31 21:02:52,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:02:52,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:02:52,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:02:52,770 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 21:02:52,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:02:52,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037786095] [2023-08-31 21:02:52,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037786095] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 21:02:52,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 21:02:52,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 21:02:52,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670497685] [2023-08-31 21:02:52,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 21:02:52,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 21:02:52,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:02:52,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 21:02:52,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 21:02:52,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 421 [2023-08-31 21:02:52,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 129 transitions, 263 flow. Second operand has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 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 21:02:52,820 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:02:52,820 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 421 [2023-08-31 21:02:52,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:02:53,005 INFO L130 PetriNetUnfolder]: 380/1477 cut-off events. [2023-08-31 21:02:53,006 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 21:02:53,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2225 conditions, 1477 events. 380/1477 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 10309 event pairs, 340 based on Foata normal form. 141/1498 useless extension candidates. Maximal degree in co-relation 2132. Up to 741 conditions per place. [2023-08-31 21:02:53,009 INFO L137 encePairwiseOnDemand]: 397/421 looper letters, 23 selfloop transitions, 2 changer transitions 53/109 dead transitions. [2023-08-31 21:02:53,009 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 109 transitions, 307 flow [2023-08-31 21:02:53,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 21:02:53,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 21:02:53,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 745 transitions. [2023-08-31 21:02:53,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5898653998416469 [2023-08-31 21:02:53,027 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 745 transitions. [2023-08-31 21:02:53,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 745 transitions. [2023-08-31 21:02:53,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:02:53,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 745 transitions. [2023-08-31 21:02:53,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.33333333333334) internal successors, (745), 3 states have internal predecessors, (745), 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 21:02:53,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 421.0) internal successors, (1684), 4 states have internal predecessors, (1684), 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 21:02:53,044 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 421.0) internal successors, (1684), 4 states have internal predecessors, (1684), 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 21:02:53,046 INFO L175 Difference]: Start difference. First operand has 109 places, 129 transitions, 263 flow. Second operand 3 states and 745 transitions. [2023-08-31 21:02:53,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 109 transitions, 307 flow [2023-08-31 21:02:53,049 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 21:02:53,051 INFO L231 Difference]: Finished difference. Result has 111 places, 56 transitions, 127 flow [2023-08-31 21:02:53,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=421, 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 21:02:53,055 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, 2 predicate places. [2023-08-31 21:02:53,056 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 56 transitions, 127 flow [2023-08-31 21:02:53,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 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 21:02:53,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:02:53,057 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-31 21:02:53,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 21:02:53,058 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:02:53,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:02:53,065 INFO L85 PathProgramCache]: Analyzing trace with hash -51134895, now seen corresponding path program 1 times [2023-08-31 21:02:53,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:02:53,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976851564] [2023-08-31 21:02:53,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:02:53,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:02:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:02:53,140 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 21:02:53,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:02:53,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976851564] [2023-08-31 21:02:53,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976851564] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 21:02:53,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538971556] [2023-08-31 21:02:53,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:02:53,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:02:53,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:02:53,143 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 21:02:53,150 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 21:02:53,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:02:53,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 21:02:53,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 21:02:53,249 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 21:02:53,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 21:02:53,262 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 21:02:53,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538971556] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 21:02:53,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 21:02:53,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 21:02:53,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618954658] [2023-08-31 21:02:53,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 21:02:53,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 21:02:53,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:02:53,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 21:02:53,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 21:02:53,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 421 [2023-08-31 21:02:53,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 56 transitions, 127 flow. Second operand has 7 states, 7 states have (on average 227.57142857142858) internal successors, (1593), 7 states have internal predecessors, (1593), 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 21:02:53,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:02:53,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 421 [2023-08-31 21:02:53,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:02:53,349 INFO L130 PetriNetUnfolder]: 56/254 cut-off events. [2023-08-31 21:02:53,349 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 21:02:53,349 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 13. Compared 872 event pairs, 51 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 391. Up to 129 conditions per place. [2023-08-31 21:02:53,350 INFO L137 encePairwiseOnDemand]: 418/421 looper letters, 23 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2023-08-31 21:02:53,350 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 59 transitions, 195 flow [2023-08-31 21:02:53,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 21:02:53,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 21:02:53,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1387 transitions. [2023-08-31 21:02:53,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.549089469517023 [2023-08-31 21:02:53,353 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1387 transitions. [2023-08-31 21:02:53,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1387 transitions. [2023-08-31 21:02:53,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:02:53,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1387 transitions. [2023-08-31 21:02:53,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 231.16666666666666) internal successors, (1387), 6 states have internal predecessors, (1387), 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 21:02:53,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 421.0) internal successors, (2947), 7 states have internal predecessors, (2947), 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 21:02:53,360 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 421.0) internal successors, (2947), 7 states have internal predecessors, (2947), 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 21:02:53,360 INFO L175 Difference]: Start difference. First operand has 111 places, 56 transitions, 127 flow. Second operand 6 states and 1387 transitions. [2023-08-31 21:02:53,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 59 transitions, 195 flow [2023-08-31 21:02:53,361 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 21:02:53,362 INFO L231 Difference]: Finished difference. Result has 66 places, 59 transitions, 159 flow [2023-08-31 21:02:53,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=421, 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 21:02:53,363 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -43 predicate places. [2023-08-31 21:02:53,363 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 59 transitions, 159 flow [2023-08-31 21:02:53,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 227.57142857142858) internal successors, (1593), 7 states have internal predecessors, (1593), 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 21:02:53,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:02:53,364 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-08-31 21:02:53,372 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 21:02:53,569 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 21:02:53,569 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:02:53,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:02:53,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1101101078, now seen corresponding path program 2 times [2023-08-31 21:02:53,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:02:53,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300901152] [2023-08-31 21:02:53,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:02:53,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:02:53,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:02:53,661 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 21:02:53,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:02:53,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300901152] [2023-08-31 21:02:53,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300901152] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 21:02:53,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291176251] [2023-08-31 21:02:53,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 21:02:53,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:02:53,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:02:53,663 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 21:02:53,711 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 21:02:53,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 21:02:53,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 21:02:53,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 21:02:53,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 21:02:53,770 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 21:02:53,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 21:02:53,812 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 21:02:53,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291176251] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 21:02:53,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 21:02:53,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-31 21:02:53,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852517333] [2023-08-31 21:02:53,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 21:02:53,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 21:02:53,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:02:53,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 21:02:53,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-31 21:02:53,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 421 [2023-08-31 21:02:53,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 59 transitions, 159 flow. Second operand has 13 states, 13 states have (on average 227.30769230769232) internal successors, (2955), 13 states have internal predecessors, (2955), 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 21:02:53,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:02:53,855 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 421 [2023-08-31 21:02:53,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:02:53,953 INFO L130 PetriNetUnfolder]: 56/260 cut-off events. [2023-08-31 21:02:53,953 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-08-31 21:02:53,953 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 13. Compared 872 event pairs, 51 based on Foata normal form. 6/243 useless extension candidates. Maximal degree in co-relation 382. Up to 129 conditions per place. [2023-08-31 21:02:53,954 INFO L137 encePairwiseOnDemand]: 418/421 looper letters, 23 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2023-08-31 21:02:53,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 65 transitions, 263 flow [2023-08-31 21:02:53,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 21:02:53,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 21:02:53,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2752 transitions. [2023-08-31 21:02:53,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447347585114806 [2023-08-31 21:02:53,959 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2752 transitions. [2023-08-31 21:02:53,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2752 transitions. [2023-08-31 21:02:53,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:02:53,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2752 transitions. [2023-08-31 21:02:53,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 229.33333333333334) internal successors, (2752), 12 states have internal predecessors, (2752), 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 21:02:53,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 421.0) internal successors, (5473), 13 states have internal predecessors, (5473), 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 21:02:53,972 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 421.0) internal successors, (5473), 13 states have internal predecessors, (5473), 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 21:02:53,972 INFO L175 Difference]: Start difference. First operand has 66 places, 59 transitions, 159 flow. Second operand 12 states and 2752 transitions. [2023-08-31 21:02:53,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 65 transitions, 263 flow [2023-08-31 21:02:53,974 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 21:02:53,976 INFO L231 Difference]: Finished difference. Result has 82 places, 65 transitions, 229 flow [2023-08-31 21:02:53,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=421, 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 21:02:53,977 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -27 predicate places. [2023-08-31 21:02:53,977 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 65 transitions, 229 flow [2023-08-31 21:02:53,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 227.30769230769232) internal successors, (2955), 13 states have internal predecessors, (2955), 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 21:02:53,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:02:53,981 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-31 21:02:54,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 21:02:54,186 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 21:02:54,187 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:02:54,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:02:54,187 INFO L85 PathProgramCache]: Analyzing trace with hash -731767158, now seen corresponding path program 3 times [2023-08-31 21:02:54,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:02:54,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537774433] [2023-08-31 21:02:54,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:02:54,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:02:54,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:02:54,227 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 21:02:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:02:54,268 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 21:02:54,269 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 21:02:54,269 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 21:02:54,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 21:02:54,270 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-31 21:02:54,272 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 21:02:54,272 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 21:02:54,272 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-31 21:02:54,330 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 21:02:54,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 325 places, 365 transitions, 748 flow [2023-08-31 21:02:54,410 INFO L130 PetriNetUnfolder]: 75/613 cut-off events. [2023-08-31 21:02:54,411 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 21:02:54,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 627 conditions, 613 events. 75/613 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3045 event pairs, 0 based on Foata normal form. 0/505 useless extension candidates. Maximal degree in co-relation 373. Up to 12 conditions per place. [2023-08-31 21:02:54,418 INFO L82 GeneralOperation]: Start removeDead. Operand has 325 places, 365 transitions, 748 flow [2023-08-31 21:02:54,422 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 325 places, 365 transitions, 748 flow [2023-08-31 21:02:54,422 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 21:02:54,422 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 325 places, 365 transitions, 748 flow [2023-08-31 21:02:54,422 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 325 places, 365 transitions, 748 flow [2023-08-31 21:02:54,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 325 places, 365 transitions, 748 flow [2023-08-31 21:02:54,481 INFO L130 PetriNetUnfolder]: 75/613 cut-off events. [2023-08-31 21:02:54,481 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 21:02:54,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 627 conditions, 613 events. 75/613 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3045 event pairs, 0 based on Foata normal form. 0/505 useless extension candidates. Maximal degree in co-relation 373. Up to 12 conditions per place. [2023-08-31 21:02:54,535 INFO L119 LiptonReduction]: Number of co-enabled transitions 69084 [2023-08-31 21:02:57,068 INFO L134 LiptonReduction]: Checked pairs total: 285496 [2023-08-31 21:02:57,068 INFO L136 LiptonReduction]: Total number of compositions: 223 [2023-08-31 21:02:57,070 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 21:02:57,071 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;@2403965a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 21:02:57,071 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 21:02:57,077 INFO L130 PetriNetUnfolder]: 21/113 cut-off events. [2023-08-31 21:02:57,077 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 21:02:57,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:02:57,077 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-31 21:02:57,077 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:02:57,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:02:57,078 INFO L85 PathProgramCache]: Analyzing trace with hash -42596903, now seen corresponding path program 1 times [2023-08-31 21:02:57,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:02:57,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790266003] [2023-08-31 21:02:57,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:02:57,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:02:57,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:02:57,116 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 21:02:57,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:02:57,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790266003] [2023-08-31 21:02:57,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790266003] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 21:02:57,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 21:02:57,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 21:02:57,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509306090] [2023-08-31 21:02:57,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 21:02:57,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 21:02:57,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:02:57,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 21:02:57,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 21:02:57,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 315 out of 588 [2023-08-31 21:02:57,126 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 192 transitions, 402 flow. Second operand has 3 states, 3 states have (on average 317.0) internal successors, (951), 3 states have internal predecessors, (951), 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 21:02:57,126 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:02:57,126 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 315 of 588 [2023-08-31 21:02:57,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:02:59,855 INFO L130 PetriNetUnfolder]: 14724/34920 cut-off events. [2023-08-31 21:02:59,856 INFO L131 PetriNetUnfolder]: For 172/220 co-relation queries the response was YES. [2023-08-31 21:02:59,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56293 conditions, 34920 events. 14724/34920 cut-off events. For 172/220 co-relation queries the response was YES. Maximal size of possible extension queue 884. Compared 376591 event pairs, 13600 based on Foata normal form. 3867/35866 useless extension candidates. Maximal degree in co-relation 26706. Up to 21259 conditions per place. [2023-08-31 21:02:59,949 INFO L137 encePairwiseOnDemand]: 555/588 looper letters, 41 selfloop transitions, 2 changer transitions 58/163 dead transitions. [2023-08-31 21:02:59,949 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 163 transitions, 472 flow [2023-08-31 21:02:59,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 21:02:59,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 21:02:59,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1040 transitions. [2023-08-31 21:02:59,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5895691609977324 [2023-08-31 21:02:59,951 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1040 transitions. [2023-08-31 21:02:59,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1040 transitions. [2023-08-31 21:02:59,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:02:59,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1040 transitions. [2023-08-31 21:02:59,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 346.6666666666667) internal successors, (1040), 3 states have internal predecessors, (1040), 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 21:02:59,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 588.0) internal successors, (2352), 4 states have internal predecessors, (2352), 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 21:02:59,956 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 588.0) internal successors, (2352), 4 states have internal predecessors, (2352), 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 21:02:59,956 INFO L175 Difference]: Start difference. First operand has 161 places, 192 transitions, 402 flow. Second operand 3 states and 1040 transitions. [2023-08-31 21:02:59,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 163 transitions, 472 flow [2023-08-31 21:02:59,958 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 21:02:59,959 INFO L231 Difference]: Finished difference. Result has 164 places, 105 transitions, 232 flow [2023-08-31 21:02:59,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=588, 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 21:02:59,960 INFO L281 CegarLoopForPetriNet]: 161 programPoint places, 3 predicate places. [2023-08-31 21:02:59,960 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 105 transitions, 232 flow [2023-08-31 21:02:59,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 317.0) internal successors, (951), 3 states have internal predecessors, (951), 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 21:02:59,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:02:59,961 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-31 21:02:59,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 21:02:59,961 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:02:59,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:02:59,962 INFO L85 PathProgramCache]: Analyzing trace with hash -726527017, now seen corresponding path program 1 times [2023-08-31 21:02:59,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:02:59,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227093585] [2023-08-31 21:02:59,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:02:59,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:02:59,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:02:59,986 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 21:02:59,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:02:59,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227093585] [2023-08-31 21:02:59,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227093585] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 21:02:59,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435345701] [2023-08-31 21:02:59,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:02:59,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:02:59,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:02:59,989 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 21:02:59,991 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 21:03:00,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:03:00,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 21:03:00,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 21:03:00,058 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 21:03:00,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 21:03:00,069 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 21:03:00,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435345701] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 21:03:00,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 21:03:00,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 21:03:00,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691130313] [2023-08-31 21:03:00,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 21:03:00,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 21:03:00,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:03:00,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 21:03:00,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 21:03:00,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 588 [2023-08-31 21:03:00,087 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 105 transitions, 232 flow. Second operand has 7 states, 7 states have (on average 315.7142857142857) internal successors, (2210), 7 states have internal predecessors, (2210), 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 21:03:00,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:03:00,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 588 [2023-08-31 21:03:00,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:03:00,456 INFO L130 PetriNetUnfolder]: 2338/5919 cut-off events. [2023-08-31 21:03:00,456 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2023-08-31 21:03:00,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9575 conditions, 5919 events. 2338/5919 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 48256 event pairs, 2193 based on Foata normal form. 0/5319 useless extension candidates. Maximal degree in co-relation 9562. Up to 3567 conditions per place. [2023-08-31 21:03:00,541 INFO L137 encePairwiseOnDemand]: 585/588 looper letters, 41 selfloop transitions, 5 changer transitions 0/108 dead transitions. [2023-08-31 21:03:00,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 108 transitions, 336 flow [2023-08-31 21:03:00,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 21:03:00,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 21:03:00,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1933 transitions. [2023-08-31 21:03:00,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5479024943310657 [2023-08-31 21:03:00,545 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1933 transitions. [2023-08-31 21:03:00,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1933 transitions. [2023-08-31 21:03:00,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:03:00,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1933 transitions. [2023-08-31 21:03:00,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 322.1666666666667) internal successors, (1933), 6 states have internal predecessors, (1933), 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 21:03:00,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 588.0) internal successors, (4116), 7 states have internal predecessors, (4116), 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 21:03:00,553 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 588.0) internal successors, (4116), 7 states have internal predecessors, (4116), 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 21:03:00,553 INFO L175 Difference]: Start difference. First operand has 164 places, 105 transitions, 232 flow. Second operand 6 states and 1933 transitions. [2023-08-31 21:03:00,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 108 transitions, 336 flow [2023-08-31 21:03:00,554 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 21:03:00,555 INFO L231 Difference]: Finished difference. Result has 116 places, 108 transitions, 262 flow [2023-08-31 21:03:00,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=588, 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 21:03:00,556 INFO L281 CegarLoopForPetriNet]: 161 programPoint places, -45 predicate places. [2023-08-31 21:03:00,556 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 108 transitions, 262 flow [2023-08-31 21:03:00,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 315.7142857142857) internal successors, (2210), 7 states have internal predecessors, (2210), 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 21:03:00,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:03:00,557 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-31 21:03:00,569 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 21:03:00,762 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 21:03:00,762 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:03:00,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:03:00,763 INFO L85 PathProgramCache]: Analyzing trace with hash -217541287, now seen corresponding path program 2 times [2023-08-31 21:03:00,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:03:00,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884367667] [2023-08-31 21:03:00,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:03:00,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:03:00,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:03:00,823 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 21:03:00,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:03:00,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884367667] [2023-08-31 21:03:00,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884367667] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 21:03:00,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089428204] [2023-08-31 21:03:00,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 21:03:00,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:03:00,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:03:00,834 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 21:03:00,837 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 21:03:00,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 21:03:00,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 21:03:00,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 21:03:00,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 21:03:00,920 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 21:03:00,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 21:03:00,961 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 21:03:00,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089428204] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 21:03:00,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 21:03:00,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-31 21:03:00,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575225674] [2023-08-31 21:03:00,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 21:03:00,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 21:03:00,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:03:00,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 21:03:00,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-31 21:03:01,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 588 [2023-08-31 21:03:01,004 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 108 transitions, 262 flow. Second operand has 13 states, 13 states have (on average 315.38461538461536) internal successors, (4100), 13 states have internal predecessors, (4100), 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 21:03:01,004 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:03:01,005 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 588 [2023-08-31 21:03:01,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:03:01,404 INFO L130 PetriNetUnfolder]: 2338/5925 cut-off events. [2023-08-31 21:03:01,404 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2023-08-31 21:03:01,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9604 conditions, 5925 events. 2338/5925 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 48276 event pairs, 2193 based on Foata normal form. 6/5332 useless extension candidates. Maximal degree in co-relation 9545. Up to 3567 conditions per place. [2023-08-31 21:03:01,428 INFO L137 encePairwiseOnDemand]: 585/588 looper letters, 41 selfloop transitions, 11 changer transitions 0/114 dead transitions. [2023-08-31 21:03:01,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 114 transitions, 402 flow [2023-08-31 21:03:01,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 21:03:01,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 21:03:01,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3826 transitions. [2023-08-31 21:03:01,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5422335600907029 [2023-08-31 21:03:01,435 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3826 transitions. [2023-08-31 21:03:01,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3826 transitions. [2023-08-31 21:03:01,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:03:01,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3826 transitions. [2023-08-31 21:03:01,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 318.8333333333333) internal successors, (3826), 12 states have internal predecessors, (3826), 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 21:03:01,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 588.0) internal successors, (7644), 13 states have internal predecessors, (7644), 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 21:03:01,451 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 588.0) internal successors, (7644), 13 states have internal predecessors, (7644), 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 21:03:01,451 INFO L175 Difference]: Start difference. First operand has 116 places, 108 transitions, 262 flow. Second operand 12 states and 3826 transitions. [2023-08-31 21:03:01,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 114 transitions, 402 flow [2023-08-31 21:03:01,452 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 21:03:01,498 INFO L231 Difference]: Finished difference. Result has 132 places, 114 transitions, 332 flow [2023-08-31 21:03:01,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=588, 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 21:03:01,499 INFO L281 CegarLoopForPetriNet]: 161 programPoint places, -29 predicate places. [2023-08-31 21:03:01,499 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 114 transitions, 332 flow [2023-08-31 21:03:01,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 315.38461538461536) internal successors, (4100), 13 states have internal predecessors, (4100), 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 21:03:01,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:03:01,500 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-31 21:03:01,532 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 21:03:01,701 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 21:03:01,701 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:03:01,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:03:01,701 INFO L85 PathProgramCache]: Analyzing trace with hash -831691623, now seen corresponding path program 3 times [2023-08-31 21:03:01,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:03:01,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491712723] [2023-08-31 21:03:01,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:03:01,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:03:01,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:03:01,729 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 21:03:01,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:03:01,751 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 21:03:01,751 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 21:03:01,752 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 21:03:01,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 21:03:01,752 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-31 21:03:01,752 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 21:03:01,753 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 21:03:01,753 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-31 21:03:01,798 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 21:03:01,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 416 places, 468 transitions, 966 flow [2023-08-31 21:03:01,890 INFO L130 PetriNetUnfolder]: 110/898 cut-off events. [2023-08-31 21:03:01,890 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 21:03:01,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 926 conditions, 898 events. 110/898 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4965 event pairs, 1 based on Foata normal form. 0/741 useless extension candidates. Maximal degree in co-relation 621. Up to 16 conditions per place. [2023-08-31 21:03:01,901 INFO L82 GeneralOperation]: Start removeDead. Operand has 416 places, 468 transitions, 966 flow [2023-08-31 21:03:01,906 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 416 places, 468 transitions, 966 flow [2023-08-31 21:03:01,906 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 21:03:01,906 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 416 places, 468 transitions, 966 flow [2023-08-31 21:03:01,906 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 416 places, 468 transitions, 966 flow [2023-08-31 21:03:01,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 416 places, 468 transitions, 966 flow [2023-08-31 21:03:01,993 INFO L130 PetriNetUnfolder]: 110/898 cut-off events. [2023-08-31 21:03:01,993 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 21:03:02,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 926 conditions, 898 events. 110/898 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4965 event pairs, 1 based on Foata normal form. 0/741 useless extension candidates. Maximal degree in co-relation 621. Up to 16 conditions per place. [2023-08-31 21:03:02,035 INFO L119 LiptonReduction]: Number of co-enabled transitions 135138 [2023-08-31 21:03:05,218 INFO L134 LiptonReduction]: Checked pairs total: 496005 [2023-08-31 21:03:05,218 INFO L136 LiptonReduction]: Total number of compositions: 276 [2023-08-31 21:03:05,219 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 21:03:05,220 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;@2403965a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 21:03:05,220 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 21:03:05,233 INFO L130 PetriNetUnfolder]: 37/223 cut-off events. [2023-08-31 21:03:05,233 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-31 21:03:05,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:03:05,234 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-31 21:03:05,234 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:03:05,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:03:05,234 INFO L85 PathProgramCache]: Analyzing trace with hash 858079861, now seen corresponding path program 1 times [2023-08-31 21:03:05,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:03:05,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642041153] [2023-08-31 21:03:05,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:03:05,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:03:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:03:05,267 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 21:03:05,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:03:05,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642041153] [2023-08-31 21:03:05,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642041153] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 21:03:05,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 21:03:05,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 21:03:05,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128111465] [2023-08-31 21:03:05,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 21:03:05,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 21:03:05,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:03:05,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 21:03:05,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 21:03:05,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 403 out of 744 [2023-08-31 21:03:05,281 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 252 transitions, 534 flow. Second operand has 3 states, 3 states have (on average 405.3333333333333) internal successors, (1216), 3 states have internal predecessors, (1216), 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 21:03:05,281 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:03:05,282 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 403 of 744 [2023-08-31 21:03:05,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:04:03,627 INFO L130 PetriNetUnfolder]: 402738/765384 cut-off events. [2023-08-31 21:04:03,629 INFO L131 PetriNetUnfolder]: For 5313/5871 co-relation queries the response was YES. [2023-08-31 21:04:06,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1284542 conditions, 765384 events. 402738/765384 cut-off events. For 5313/5871 co-relation queries the response was YES. Maximal size of possible extension queue 15602. Compared 10015239 event pairs, 377214 based on Foata normal form. 86989/790663 useless extension candidates. Maximal degree in co-relation 297193. Up to 516526 conditions per place. [2023-08-31 21:04:06,763 INFO L137 encePairwiseOnDemand]: 700/744 looper letters, 59 selfloop transitions, 2 changer transitions 59/212 dead transitions. [2023-08-31 21:04:06,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 212 transitions, 620 flow [2023-08-31 21:04:06,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 21:04:06,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 21:04:06,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1334 transitions. [2023-08-31 21:04:06,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5976702508960573 [2023-08-31 21:04:06,767 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1334 transitions. [2023-08-31 21:04:06,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1334 transitions. [2023-08-31 21:04:06,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:04:06,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1334 transitions. [2023-08-31 21:04:06,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 444.6666666666667) internal successors, (1334), 3 states have internal predecessors, (1334), 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 21:04:06,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 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 21:04:06,773 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 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 21:04:06,774 INFO L175 Difference]: Start difference. First operand has 210 places, 252 transitions, 534 flow. Second operand 3 states and 1334 transitions. [2023-08-31 21:04:06,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 212 transitions, 620 flow [2023-08-31 21:04:06,777 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 21:04:06,781 INFO L231 Difference]: Finished difference. Result has 213 places, 153 transitions, 337 flow [2023-08-31 21:04:06,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, 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 21:04:06,783 INFO L281 CegarLoopForPetriNet]: 210 programPoint places, 3 predicate places. [2023-08-31 21:04:06,783 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 153 transitions, 337 flow [2023-08-31 21:04:06,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 405.3333333333333) internal successors, (1216), 3 states have internal predecessors, (1216), 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 21:04:06,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:04:06,783 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 21:04:06,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 21:04:06,784 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:04:06,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:04:06,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1039074224, now seen corresponding path program 1 times [2023-08-31 21:04:06,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:04:06,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419032001] [2023-08-31 21:04:06,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:04:06,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:04:06,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:04:06,828 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 21:04:06,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:04:06,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419032001] [2023-08-31 21:04:06,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419032001] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 21:04:06,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723460855] [2023-08-31 21:04:06,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:04:06,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:04:06,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:04:06,834 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 21:04:06,839 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 21:04:06,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:04:06,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 21:04:06,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 21:04:06,923 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 21:04:06,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 21:04:06,935 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 21:04:06,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723460855] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 21:04:06,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 21:04:06,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 21:04:06,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42573187] [2023-08-31 21:04:06,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 21:04:06,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 21:04:06,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:04:06,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 21:04:06,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 21:04:06,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 402 out of 744 [2023-08-31 21:04:06,953 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 153 transitions, 337 flow. Second operand has 7 states, 7 states have (on average 403.85714285714283) internal successors, (2827), 7 states have internal predecessors, (2827), 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 21:04:06,953 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:04:06,953 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 402 of 744 [2023-08-31 21:04:06,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:04:15,273 INFO L130 PetriNetUnfolder]: 66466/130727 cut-off events. [2023-08-31 21:04:15,274 INFO L131 PetriNetUnfolder]: For 2164/2164 co-relation queries the response was YES. [2023-08-31 21:04:15,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219772 conditions, 130727 events. 66466/130727 cut-off events. For 2164/2164 co-relation queries the response was YES. Maximal size of possible extension queue 2905. Compared 1450706 event pairs, 62781 based on Foata normal form. 0/117717 useless extension candidates. Maximal degree in co-relation 219758. Up to 87483 conditions per place. [2023-08-31 21:04:15,806 INFO L137 encePairwiseOnDemand]: 741/744 looper letters, 59 selfloop transitions, 5 changer transitions 0/156 dead transitions. [2023-08-31 21:04:15,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 156 transitions, 477 flow [2023-08-31 21:04:15,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 21:04:15,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 21:04:15,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2479 transitions. [2023-08-31 21:04:15,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.555331541218638 [2023-08-31 21:04:15,810 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2479 transitions. [2023-08-31 21:04:15,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2479 transitions. [2023-08-31 21:04:15,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:04:15,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2479 transitions. [2023-08-31 21:04:15,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 413.1666666666667) internal successors, (2479), 6 states have internal predecessors, (2479), 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 21:04:15,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 744.0) internal successors, (5208), 7 states have internal predecessors, (5208), 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 21:04:15,819 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 744.0) internal successors, (5208), 7 states have internal predecessors, (5208), 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 21:04:15,820 INFO L175 Difference]: Start difference. First operand has 213 places, 153 transitions, 337 flow. Second operand 6 states and 2479 transitions. [2023-08-31 21:04:15,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 156 transitions, 477 flow [2023-08-31 21:04:15,822 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 21:04:15,823 INFO L231 Difference]: Finished difference. Result has 165 places, 156 transitions, 363 flow [2023-08-31 21:04:15,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, 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 21:04:15,824 INFO L281 CegarLoopForPetriNet]: 210 programPoint places, -45 predicate places. [2023-08-31 21:04:15,824 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 156 transitions, 363 flow [2023-08-31 21:04:15,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 403.85714285714283) internal successors, (2827), 7 states have internal predecessors, (2827), 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 21:04:15,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:04:15,825 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-31 21:04:15,833 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 21:04:16,033 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 21:04:16,033 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:04:16,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:04:16,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1832018229, now seen corresponding path program 2 times [2023-08-31 21:04:16,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:04:16,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946537213] [2023-08-31 21:04:16,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:04:16,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:04:16,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:04:16,103 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 21:04:16,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:04:16,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946537213] [2023-08-31 21:04:16,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946537213] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 21:04:16,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019257557] [2023-08-31 21:04:16,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 21:04:16,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:04:16,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:04:16,117 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 21:04:16,118 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 21:04:16,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 21:04:16,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 21:04:16,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 21:04:16,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 21:04:16,216 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 21:04:16,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 21:04:16,248 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 21:04:16,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019257557] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 21:04:16,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 21:04:16,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-31 21:04:16,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719287010] [2023-08-31 21:04:16,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 21:04:16,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 21:04:16,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:04:16,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 21:04:16,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-31 21:04:16,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 402 out of 744 [2023-08-31 21:04:16,280 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 156 transitions, 363 flow. Second operand has 13 states, 13 states have (on average 403.46153846153845) internal successors, (5245), 13 states have internal predecessors, (5245), 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 21:04:16,280 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:04:16,280 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 402 of 744 [2023-08-31 21:04:16,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:04:25,384 INFO L130 PetriNetUnfolder]: 66466/130733 cut-off events. [2023-08-31 21:04:25,384 INFO L131 PetriNetUnfolder]: For 1028/1028 co-relation queries the response was YES. [2023-08-31 21:04:25,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219357 conditions, 130733 events. 66466/130733 cut-off events. For 1028/1028 co-relation queries the response was YES. Maximal size of possible extension queue 2905. Compared 1450488 event pairs, 62781 based on Foata normal form. 6/117730 useless extension candidates. Maximal degree in co-relation 219297. Up to 87483 conditions per place. [2023-08-31 21:04:26,002 INFO L137 encePairwiseOnDemand]: 741/744 looper letters, 59 selfloop transitions, 11 changer transitions 0/162 dead transitions. [2023-08-31 21:04:26,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 162 transitions, 539 flow [2023-08-31 21:04:26,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 21:04:26,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 21:04:26,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 4900 transitions. [2023-08-31 21:04:26,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5488351254480287 [2023-08-31 21:04:26,009 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 4900 transitions. [2023-08-31 21:04:26,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 4900 transitions. [2023-08-31 21:04:26,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:04:26,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 4900 transitions. [2023-08-31 21:04:26,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 408.3333333333333) internal successors, (4900), 12 states have internal predecessors, (4900), 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 21:04:26,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 744.0) internal successors, (9672), 13 states have internal predecessors, (9672), 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 21:04:26,024 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 744.0) internal successors, (9672), 13 states have internal predecessors, (9672), 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 21:04:26,024 INFO L175 Difference]: Start difference. First operand has 165 places, 156 transitions, 363 flow. Second operand 12 states and 4900 transitions. [2023-08-31 21:04:26,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 162 transitions, 539 flow [2023-08-31 21:04:26,026 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 21:04:26,027 INFO L231 Difference]: Finished difference. Result has 181 places, 162 transitions, 433 flow [2023-08-31 21:04:26,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, 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 21:04:26,028 INFO L281 CegarLoopForPetriNet]: 210 programPoint places, -29 predicate places. [2023-08-31 21:04:26,028 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 162 transitions, 433 flow [2023-08-31 21:04:26,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 403.46153846153845) internal successors, (5245), 13 states have internal predecessors, (5245), 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 21:04:26,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:04:26,029 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-31 21:04:26,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-31 21:04:26,233 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 21:04:26,234 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:04:26,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:04:26,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1606941525, now seen corresponding path program 3 times [2023-08-31 21:04:26,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:04:26,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765259657] [2023-08-31 21:04:26,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:04:26,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:04:26,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:04:26,266 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 21:04:26,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:04:26,288 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 21:04:26,289 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 21:04:26,289 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 21:04:26,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 21:04:26,289 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-31 21:04:26,290 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 21:04:26,291 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 21:04:26,291 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-31 21:04:26,524 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-31 21:04:26,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 507 places, 571 transitions, 1186 flow [2023-08-31 21:04:26,681 INFO L130 PetriNetUnfolder]: 157/1271 cut-off events. [2023-08-31 21:04:26,681 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-31 21:04:26,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1326 conditions, 1271 events. 157/1271 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 7472 event pairs, 6 based on Foata normal form. 0/1053 useless extension candidates. Maximal degree in co-relation 918. Up to 32 conditions per place. [2023-08-31 21:04:26,709 INFO L82 GeneralOperation]: Start removeDead. Operand has 507 places, 571 transitions, 1186 flow [2023-08-31 21:04:26,716 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 507 places, 571 transitions, 1186 flow [2023-08-31 21:04:26,716 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 21:04:26,716 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 507 places, 571 transitions, 1186 flow [2023-08-31 21:04:26,717 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 507 places, 571 transitions, 1186 flow [2023-08-31 21:04:26,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 507 places, 571 transitions, 1186 flow [2023-08-31 21:04:26,876 INFO L130 PetriNetUnfolder]: 157/1271 cut-off events. [2023-08-31 21:04:26,876 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-31 21:04:26,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1326 conditions, 1271 events. 157/1271 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 7472 event pairs, 6 based on Foata normal form. 0/1053 useless extension candidates. Maximal degree in co-relation 918. Up to 32 conditions per place. [2023-08-31 21:04:26,986 INFO L119 LiptonReduction]: Number of co-enabled transitions 222200 [2023-08-31 21:04:30,601 INFO L134 LiptonReduction]: Checked pairs total: 922994 [2023-08-31 21:04:30,602 INFO L136 LiptonReduction]: Total number of compositions: 336 [2023-08-31 21:04:30,622 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 21:04:30,622 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;@2403965a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 21:04:30,622 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 21:04:30,660 INFO L130 PetriNetUnfolder]: 56/343 cut-off events. [2023-08-31 21:04:30,660 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 21:04:30,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:04:30,661 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 21:04:30,661 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:04:30,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:04:30,662 INFO L85 PathProgramCache]: Analyzing trace with hash -320121765, now seen corresponding path program 1 times [2023-08-31 21:04:30,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:04:30,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180589805] [2023-08-31 21:04:30,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:04:30,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:04:30,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:04:30,713 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 21:04:30,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:04:30,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180589805] [2023-08-31 21:04:30,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180589805] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 21:04:30,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 21:04:30,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 21:04:30,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141113090] [2023-08-31 21:04:30,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 21:04:30,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 21:04:30,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:04:30,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 21:04:30,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 21:04:30,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 491 out of 907 [2023-08-31 21:04:30,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 311 transitions, 666 flow. Second operand has 3 states, 3 states have (on average 493.6666666666667) internal successors, (1481), 3 states have internal predecessors, (1481), 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 21:04:30,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:04:30,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 491 of 907 [2023-08-31 21:04:30,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand