./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-data-race.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_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_75-tricky_address2_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 3c0354ee6107efc04d15102ecf9eef73430e38e14b70f16419cd07cd733fd0df --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 21:02:52,804 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 21:02:52,806 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 21:02:52,851 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 21:02:52,853 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 21:02:52,856 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 21:02:52,857 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 21:02:52,860 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 21:02:52,862 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 21:02:52,866 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 21:02:52,867 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 21:02:52,869 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 21:02:52,870 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 21:02:52,871 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 21:02:52,873 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 21:02:52,878 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 21:02:52,879 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 21:02:52,880 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 21:02:52,881 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 21:02:52,886 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 21:02:52,887 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 21:02:52,888 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 21:02:52,889 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 21:02:52,890 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 21:02:52,896 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 21:02:52,896 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 21:02:52,897 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 21:02:52,898 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 21:02:52,899 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 21:02:52,899 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 21:02:52,900 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 21:02:52,905 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 21:02:52,907 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 21:02:52,908 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 21:02:52,909 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 21:02:52,909 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 21:02:52,909 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 21:02:52,910 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 21:02:52,910 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 21:02:52,910 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 21:02:52,911 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 21:02:52,912 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-32bit-Automizer_Default.epf [2023-08-31 21:02:52,945 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 21:02:52,946 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 21:02:52,947 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 21:02:52,947 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 21:02:52,948 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 21:02:52,948 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 21:02:52,948 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 21:02:52,949 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 21:02:52,949 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 21:02:52,949 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 21:02:52,950 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 21:02:52,950 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 21:02:52,950 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 21:02:52,950 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 21:02:52,950 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 21:02:52,951 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 21:02:52,951 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 21:02:52,951 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 21:02:52,951 INFO L138 SettingsManager]: * Check absence of data races in concurrent programs=true [2023-08-31 21:02:52,951 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 21:02:52,951 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 21:02:52,952 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 21:02:52,952 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 21:02:52,952 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 21:02:52,952 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 21:02:52,952 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 21:02:52,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 21:02:52,953 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 21:02:52,953 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 21:02:52,953 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 21:02:52,953 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 21:02:52,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 21:02:52,954 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 21:02:52,954 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 21:02:52,954 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 21:02:52,954 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 21:02:52,954 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 21:02:52,955 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c0354ee6107efc04d15102ecf9eef73430e38e14b70f16419cd07cd733fd0df Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 21:02:53,251 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 21:02:53,272 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 21:02:53,274 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 21:02:53,275 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 21:02:53,276 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 21:02:53,277 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2023-08-31 21:02:54,581 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 21:02:54,878 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 21:02:54,880 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2023-08-31 21:02:54,892 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f208b0564/1f44f7b25b6646fa8e0add1e51855196/FLAGf9e54fc3f [2023-08-31 21:02:54,906 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f208b0564/1f44f7b25b6646fa8e0add1e51855196 [2023-08-31 21:02:54,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 21:02:54,909 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 21:02:54,910 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 21:02:54,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 21:02:54,915 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 21:02:54,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 09:02:54" (1/1) ... [2023-08-31 21:02:54,917 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c66696c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:02:54, skipping insertion in model container [2023-08-31 21:02:54,918 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 09:02:54" (1/1) ... [2023-08-31 21:02:54,924 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 21:02:54,987 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 21:02:55,410 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_75-tricky_address2_racefree.i[41323,41336] [2023-08-31 21:02:55,469 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 21:02:55,485 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 21:02:55,529 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_75-tricky_address2_racefree.i[41323,41336] [2023-08-31 21:02:55,560 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 21:02:55,628 INFO L208 MainTranslator]: Completed translation [2023-08-31 21:02:55,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:02:55 WrapperNode [2023-08-31 21:02:55,629 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 21:02:55,630 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 21:02:55,630 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 21:02:55,630 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 21:02:55,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:02:55" (1/1) ... [2023-08-31 21:02:55,669 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:02:55" (1/1) ... [2023-08-31 21:02:55,721 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 253 [2023-08-31 21:02:55,721 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 21:02:55,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 21:02:55,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 21:02:55,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 21:02:55,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:02:55" (1/1) ... [2023-08-31 21:02:55,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:02:55" (1/1) ... [2023-08-31 21:02:55,748 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:02:55" (1/1) ... [2023-08-31 21:02:55,749 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:02:55" (1/1) ... [2023-08-31 21:02:55,798 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:02:55" (1/1) ... [2023-08-31 21:02:55,802 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:02:55" (1/1) ... [2023-08-31 21:02:55,804 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:02:55" (1/1) ... [2023-08-31 21:02:55,805 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:02:55" (1/1) ... [2023-08-31 21:02:55,808 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 21:02:55,809 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 21:02:55,809 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 21:02:55,809 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 21:02:55,810 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:02:55" (1/1) ... [2023-08-31 21:02:55,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 21:02:55,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:02:55,846 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 21:02:55,848 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 21:02:55,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 21:02:55,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 21:02:55,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 21:02:55,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 21:02:55,876 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-31 21:02:55,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 21:02:55,876 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-31 21:02:55,876 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-31 21:02:55,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 21:02:55,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 21:02:55,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 21:02:55,878 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 21:02:55,988 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 21:02:55,990 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 21:02:56,499 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 21:02:56,507 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 21:02:56,511 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-08-31 21:02:56,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 09:02:56 BoogieIcfgContainer [2023-08-31 21:02:56,516 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 21:02:56,517 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 21:02:56,517 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 21:02:56,520 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 21:02:56,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 09:02:54" (1/3) ... [2023-08-31 21:02:56,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5848b5a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 09:02:56, skipping insertion in model container [2023-08-31 21:02:56,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:02:55" (2/3) ... [2023-08-31 21:02:56,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5848b5a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 09:02:56, skipping insertion in model container [2023-08-31 21:02:56,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 09:02:56" (3/3) ... [2023-08-31 21:02:56,523 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_75-tricky_address2_racefree.i [2023-08-31 21:02:56,530 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 21:02:56,538 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 21:02:56,539 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-08-31 21:02:56,539 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 21:02:56,613 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-31 21:02:56,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 234 places, 262 transitions, 532 flow [2023-08-31 21:02:56,760 INFO L130 PetriNetUnfolder]: 45/371 cut-off events. [2023-08-31 21:02:56,760 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 21:02:56,776 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 21:02:56,776 INFO L82 GeneralOperation]: Start removeDead. Operand has 234 places, 262 transitions, 532 flow [2023-08-31 21:02:56,782 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 230 places, 257 transitions, 519 flow [2023-08-31 21:02:56,786 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 21:02:56,794 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 230 places, 257 transitions, 519 flow [2023-08-31 21:02:56,797 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 230 places, 257 transitions, 519 flow [2023-08-31 21:02:56,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 257 transitions, 519 flow [2023-08-31 21:02:56,858 INFO L130 PetriNetUnfolder]: 44/366 cut-off events. [2023-08-31 21:02:56,858 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 21:02:56,861 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 21:02:56,872 INFO L119 LiptonReduction]: Number of co-enabled transitions 23230 [2023-08-31 21:02:59,422 INFO L134 LiptonReduction]: Checked pairs total: 83117 [2023-08-31 21:02:59,423 INFO L136 LiptonReduction]: Total number of compositions: 159 [2023-08-31 21:02:59,436 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 21:02:59,441 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;@770556f4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 21:02:59,442 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 21:02:59,445 INFO L130 PetriNetUnfolder]: 5/29 cut-off events. [2023-08-31 21:02:59,446 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 21:02:59,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:02:59,446 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-31 21:02:59,447 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:02:59,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:02:59,451 INFO L85 PathProgramCache]: Analyzing trace with hash 338310698, now seen corresponding path program 1 times [2023-08-31 21:02:59,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:02:59,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864968384] [2023-08-31 21:02:59,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:02:59,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:02:59,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:02:59,731 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 21:02:59,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:02:59,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864968384] [2023-08-31 21:02:59,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864968384] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 21:02:59,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 21:02:59,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 21:02:59,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434801335] [2023-08-31 21:02:59,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 21:02:59,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 21:02:59,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:02:59,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 21:02:59,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 21:02:59,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 421 [2023-08-31 21:02:59,796 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 21:02:59,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:02:59,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 421 [2023-08-31 21:02:59,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:03:00,071 INFO L130 PetriNetUnfolder]: 380/1477 cut-off events. [2023-08-31 21:03:00,071 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 21:03:00,075 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 21:03:00,077 INFO L137 encePairwiseOnDemand]: 397/421 looper letters, 23 selfloop transitions, 2 changer transitions 53/109 dead transitions. [2023-08-31 21:03:00,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 109 transitions, 307 flow [2023-08-31 21:03:00,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 21:03:00,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 21:03:00,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 745 transitions. [2023-08-31 21:03:00,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5898653998416469 [2023-08-31 21:03:00,097 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 745 transitions. [2023-08-31 21:03:00,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 745 transitions. [2023-08-31 21:03:00,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:03:00,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 745 transitions. [2023-08-31 21:03:00,109 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 21:03:00,117 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 21:03:00,118 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 21:03:00,119 INFO L175 Difference]: Start difference. First operand has 109 places, 129 transitions, 263 flow. Second operand 3 states and 745 transitions. [2023-08-31 21:03:00,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 109 transitions, 307 flow [2023-08-31 21:03:00,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 109 transitions, 307 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 21:03:00,125 INFO L231 Difference]: Finished difference. Result has 111 places, 56 transitions, 127 flow [2023-08-31 21:03:00,127 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 21:03:00,130 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, 2 predicate places. [2023-08-31 21:03:00,130 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 56 transitions, 127 flow [2023-08-31 21:03:00,131 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 21:03:00,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:03:00,131 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-31 21:03:00,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 21:03:00,133 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:03:00,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:03:00,135 INFO L85 PathProgramCache]: Analyzing trace with hash -51134895, now seen corresponding path program 1 times [2023-08-31 21:03:00,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:03:00,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726556963] [2023-08-31 21:03:00,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:03:00,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:03:00,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:03:00,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 21:03:00,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:03:00,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726556963] [2023-08-31 21:03:00,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726556963] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 21:03:00,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689294646] [2023-08-31 21:03:00,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:03:00,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:03:00,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:03:00,257 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 21:03:00,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 21:03:00,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:03:00,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 21:03:00,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 21:03:00,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 21:03:00,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 21:03:00,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 21:03:00,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689294646] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 21:03:00,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 21:03:00,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 21:03:00,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063796701] [2023-08-31 21:03:00,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 21:03:00,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 21:03:00,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:03:00,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 21:03:00,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 21:03:00,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 421 [2023-08-31 21:03:00,448 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 21:03:00,448 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:03:00,448 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 421 [2023-08-31 21:03:00,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:03:00,540 INFO L130 PetriNetUnfolder]: 56/254 cut-off events. [2023-08-31 21:03:00,546 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 21:03:00,547 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 21:03:00,548 INFO L137 encePairwiseOnDemand]: 418/421 looper letters, 23 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2023-08-31 21:03:00,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 59 transitions, 195 flow [2023-08-31 21:03:00,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 21:03:00,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 21:03:00,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1387 transitions. [2023-08-31 21:03:00,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.549089469517023 [2023-08-31 21:03:00,552 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1387 transitions. [2023-08-31 21:03:00,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1387 transitions. [2023-08-31 21:03:00,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:03:00,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1387 transitions. [2023-08-31 21:03:00,556 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 21:03:00,575 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 21:03:00,576 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 21:03:00,577 INFO L175 Difference]: Start difference. First operand has 111 places, 56 transitions, 127 flow. Second operand 6 states and 1387 transitions. [2023-08-31 21:03:00,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 59 transitions, 195 flow [2023-08-31 21:03:00,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 59 transitions, 191 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 21:03:00,580 INFO L231 Difference]: Finished difference. Result has 66 places, 59 transitions, 159 flow [2023-08-31 21:03:00,580 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 21:03:00,581 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -43 predicate places. [2023-08-31 21:03:00,581 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 59 transitions, 159 flow [2023-08-31 21:03:00,582 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 21:03:00,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:03:00,582 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-08-31 21:03:00,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-31 21:03:00,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:03:00,788 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:03:00,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:03:00,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1101101078, now seen corresponding path program 2 times [2023-08-31 21:03:00,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:03:00,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755786155] [2023-08-31 21:03:00,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:03:00,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:03:00,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:03:00,917 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 21:03:00,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:03:00,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755786155] [2023-08-31 21:03:00,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755786155] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 21:03:00,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003148497] [2023-08-31 21:03:00,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 21:03:00,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:03:00,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:03:00,920 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 21:03:00,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 21:03:01,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 21:03:01,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 21:03:01,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 21:03:01,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 21:03:01,031 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 21:03:01,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 21:03:01,084 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 21:03:01,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003148497] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 21:03:01,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 21:03:01,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-31 21:03:01,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488491896] [2023-08-31 21:03:01,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 21:03:01,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 21:03:01,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:03:01,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 21:03:01,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-31 21:03:01,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 421 [2023-08-31 21:03:01,129 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 21:03:01,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:03:01,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 421 [2023-08-31 21:03:01,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:03:01,239 INFO L130 PetriNetUnfolder]: 56/260 cut-off events. [2023-08-31 21:03:01,240 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-08-31 21:03:01,240 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 21:03:01,241 INFO L137 encePairwiseOnDemand]: 418/421 looper letters, 23 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2023-08-31 21:03:01,241 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 65 transitions, 263 flow [2023-08-31 21:03:01,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 21:03:01,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 21:03:01,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2752 transitions. [2023-08-31 21:03:01,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447347585114806 [2023-08-31 21:03:01,247 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2752 transitions. [2023-08-31 21:03:01,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2752 transitions. [2023-08-31 21:03:01,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:03:01,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2752 transitions. [2023-08-31 21:03:01,253 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 21:03:01,270 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 21:03:01,272 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 21:03:01,272 INFO L175 Difference]: Start difference. First operand has 66 places, 59 transitions, 159 flow. Second operand 12 states and 2752 transitions. [2023-08-31 21:03:01,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 65 transitions, 263 flow [2023-08-31 21:03:01,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 65 transitions, 249 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-31 21:03:01,275 INFO L231 Difference]: Finished difference. Result has 82 places, 65 transitions, 229 flow [2023-08-31 21:03:01,275 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 21:03:01,276 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -27 predicate places. [2023-08-31 21:03:01,276 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 65 transitions, 229 flow [2023-08-31 21:03:01,277 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 21:03:01,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:03:01,278 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-31 21:03:01,287 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 21:03:01,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-31 21:03:01,483 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:03:01,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:03:01,484 INFO L85 PathProgramCache]: Analyzing trace with hash -731767158, now seen corresponding path program 3 times [2023-08-31 21:03:01,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:03:01,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618146300] [2023-08-31 21:03:01,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:03:01,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:03:01,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:03:01,512 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 21:03:01,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:03:01,549 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 21:03:01,549 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 21:03:01,550 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 21:03:01,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 21:03:01,552 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-31 21:03:01,553 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 21:03:01,554 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 21:03:01,554 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-31 21:03:01,602 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 21:03:01,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 325 places, 365 transitions, 748 flow [2023-08-31 21:03:01,690 INFO L130 PetriNetUnfolder]: 75/613 cut-off events. [2023-08-31 21:03:01,690 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 21:03:01,698 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 21:03:01,698 INFO L82 GeneralOperation]: Start removeDead. Operand has 325 places, 365 transitions, 748 flow [2023-08-31 21:03:01,703 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 325 places, 365 transitions, 748 flow [2023-08-31 21:03:01,703 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 21:03:01,703 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 325 places, 365 transitions, 748 flow [2023-08-31 21:03:01,704 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 325 places, 365 transitions, 748 flow [2023-08-31 21:03:01,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 325 places, 365 transitions, 748 flow [2023-08-31 21:03:01,773 INFO L130 PetriNetUnfolder]: 75/613 cut-off events. [2023-08-31 21:03:01,773 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 21:03:01,781 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 21:03:01,820 INFO L119 LiptonReduction]: Number of co-enabled transitions 69084 [2023-08-31 21:03:04,962 INFO L134 LiptonReduction]: Checked pairs total: 285496 [2023-08-31 21:03:04,962 INFO L136 LiptonReduction]: Total number of compositions: 223 [2023-08-31 21:03:04,964 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 21:03:04,965 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;@770556f4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 21:03:04,965 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 21:03:04,972 INFO L130 PetriNetUnfolder]: 21/113 cut-off events. [2023-08-31 21:03:04,972 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 21:03:04,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:03:04,972 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-31 21:03:04,973 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:03:04,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:03:04,973 INFO L85 PathProgramCache]: Analyzing trace with hash -42596903, now seen corresponding path program 1 times [2023-08-31 21:03:04,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:03:04,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777530567] [2023-08-31 21:03:04,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:03:04,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:03:04,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:03:04,999 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 21:03:04,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:03:04,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777530567] [2023-08-31 21:03:05,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777530567] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 21:03:05,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 21:03:05,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 21:03:05,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717983299] [2023-08-31 21:03:05,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 21:03:05,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 21:03:05,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:03:05,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 21:03:05,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 21:03:05,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 315 out of 588 [2023-08-31 21:03:05,019 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 21:03:05,019 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:03:05,019 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 315 of 588 [2023-08-31 21:03:05,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:03:08,257 INFO L130 PetriNetUnfolder]: 14724/34920 cut-off events. [2023-08-31 21:03:08,257 INFO L131 PetriNetUnfolder]: For 172/220 co-relation queries the response was YES. [2023-08-31 21:03:08,330 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 21:03:08,374 INFO L137 encePairwiseOnDemand]: 555/588 looper letters, 41 selfloop transitions, 2 changer transitions 58/163 dead transitions. [2023-08-31 21:03:08,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 163 transitions, 472 flow [2023-08-31 21:03:08,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 21:03:08,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 21:03:08,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1040 transitions. [2023-08-31 21:03:08,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5895691609977324 [2023-08-31 21:03:08,378 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1040 transitions. [2023-08-31 21:03:08,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1040 transitions. [2023-08-31 21:03:08,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:03:08,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1040 transitions. [2023-08-31 21:03:08,380 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 21:03:08,383 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 21:03:08,384 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 21:03:08,384 INFO L175 Difference]: Start difference. First operand has 161 places, 192 transitions, 402 flow. Second operand 3 states and 1040 transitions. [2023-08-31 21:03:08,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 163 transitions, 472 flow [2023-08-31 21:03:08,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 163 transitions, 472 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 21:03:08,389 INFO L231 Difference]: Finished difference. Result has 164 places, 105 transitions, 232 flow [2023-08-31 21:03:08,389 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 21:03:08,390 INFO L281 CegarLoopForPetriNet]: 161 programPoint places, 3 predicate places. [2023-08-31 21:03:08,390 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 105 transitions, 232 flow [2023-08-31 21:03:08,391 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 21:03:08,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:03:08,391 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-31 21:03:08,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 21:03:08,392 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:03:08,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:03:08,392 INFO L85 PathProgramCache]: Analyzing trace with hash -726527017, now seen corresponding path program 1 times [2023-08-31 21:03:08,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:03:08,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848159038] [2023-08-31 21:03:08,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:03:08,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:03:08,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:03:08,426 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 21:03:08,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:03:08,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848159038] [2023-08-31 21:03:08,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848159038] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 21:03:08,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095067024] [2023-08-31 21:03:08,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:03:08,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:03:08,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:03:08,429 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 21:03:08,455 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 21:03:08,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:03:08,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 21:03:08,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 21:03:08,519 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 21:03:08,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 21:03:08,531 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 21:03:08,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095067024] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 21:03:08,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 21:03:08,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 21:03:08,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383608537] [2023-08-31 21:03:08,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 21:03:08,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 21:03:08,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:03:08,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 21:03:08,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 21:03:08,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 588 [2023-08-31 21:03:08,557 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 21:03:08,558 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:03:08,558 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 588 [2023-08-31 21:03:08,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:03:09,021 INFO L130 PetriNetUnfolder]: 2338/5919 cut-off events. [2023-08-31 21:03:09,022 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2023-08-31 21:03:09,033 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 21:03:09,051 INFO L137 encePairwiseOnDemand]: 585/588 looper letters, 41 selfloop transitions, 5 changer transitions 0/108 dead transitions. [2023-08-31 21:03:09,051 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 108 transitions, 336 flow [2023-08-31 21:03:09,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 21:03:09,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 21:03:09,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1933 transitions. [2023-08-31 21:03:09,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5479024943310657 [2023-08-31 21:03:09,058 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1933 transitions. [2023-08-31 21:03:09,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1933 transitions. [2023-08-31 21:03:09,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:03:09,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1933 transitions. [2023-08-31 21:03:09,064 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 21:03:09,069 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 21:03:09,071 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 21:03:09,071 INFO L175 Difference]: Start difference. First operand has 164 places, 105 transitions, 232 flow. Second operand 6 states and 1933 transitions. [2023-08-31 21:03:09,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 108 transitions, 336 flow [2023-08-31 21:03:09,072 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 21:03:09,074 INFO L231 Difference]: Finished difference. Result has 116 places, 108 transitions, 262 flow [2023-08-31 21:03:09,074 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 21:03:09,075 INFO L281 CegarLoopForPetriNet]: 161 programPoint places, -45 predicate places. [2023-08-31 21:03:09,075 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 108 transitions, 262 flow [2023-08-31 21:03:09,076 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 21:03:09,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:03:09,076 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-31 21:03:09,084 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 21:03:09,284 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 21:03:09,284 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:03:09,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:03:09,285 INFO L85 PathProgramCache]: Analyzing trace with hash -217541287, now seen corresponding path program 2 times [2023-08-31 21:03:09,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:03:09,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016416272] [2023-08-31 21:03:09,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:03:09,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:03:09,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:03:09,461 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 21:03:09,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:03:09,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016416272] [2023-08-31 21:03:09,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016416272] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 21:03:09,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717254618] [2023-08-31 21:03:09,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 21:03:09,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:03:09,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:03:09,463 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 21:03:09,465 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 21:03:09,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 21:03:09,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 21:03:09,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 21:03:09,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 21:03:09,567 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 21:03:09,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 21:03:09,624 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 21:03:09,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717254618] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 21:03:09,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 21:03:09,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-31 21:03:09,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358415055] [2023-08-31 21:03:09,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 21:03:09,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 21:03:09,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:03:09,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 21:03:09,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-31 21:03:09,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 588 [2023-08-31 21:03:09,668 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 21:03:09,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:03:09,668 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 588 [2023-08-31 21:03:09,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:03:10,135 INFO L130 PetriNetUnfolder]: 2338/5925 cut-off events. [2023-08-31 21:03:10,135 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2023-08-31 21:03:10,145 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 21:03:10,162 INFO L137 encePairwiseOnDemand]: 585/588 looper letters, 41 selfloop transitions, 11 changer transitions 0/114 dead transitions. [2023-08-31 21:03:10,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 114 transitions, 402 flow [2023-08-31 21:03:10,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 21:03:10,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 21:03:10,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3826 transitions. [2023-08-31 21:03:10,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5422335600907029 [2023-08-31 21:03:10,171 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3826 transitions. [2023-08-31 21:03:10,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3826 transitions. [2023-08-31 21:03:10,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:03:10,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3826 transitions. [2023-08-31 21:03:10,180 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 21:03:10,190 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 21:03:10,192 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 21:03:10,192 INFO L175 Difference]: Start difference. First operand has 116 places, 108 transitions, 262 flow. Second operand 12 states and 3826 transitions. [2023-08-31 21:03:10,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 114 transitions, 402 flow [2023-08-31 21:03:10,194 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 21:03:10,195 INFO L231 Difference]: Finished difference. Result has 132 places, 114 transitions, 332 flow [2023-08-31 21:03:10,195 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 21:03:10,196 INFO L281 CegarLoopForPetriNet]: 161 programPoint places, -29 predicate places. [2023-08-31 21:03:10,196 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 114 transitions, 332 flow [2023-08-31 21:03:10,197 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 21:03:10,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:03:10,198 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-31 21:03:10,203 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 21:03:10,403 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 21:03:10,403 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:03:10,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:03:10,403 INFO L85 PathProgramCache]: Analyzing trace with hash -831691623, now seen corresponding path program 3 times [2023-08-31 21:03:10,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:03:10,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872661722] [2023-08-31 21:03:10,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:03:10,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:03:10,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:03:10,424 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 21:03:10,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:03:10,446 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 21:03:10,447 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 21:03:10,447 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 21:03:10,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 21:03:10,447 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-31 21:03:10,448 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 21:03:10,448 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 21:03:10,448 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-31 21:03:10,492 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 21:03:10,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 416 places, 468 transitions, 966 flow [2023-08-31 21:03:10,621 INFO L130 PetriNetUnfolder]: 110/898 cut-off events. [2023-08-31 21:03:10,622 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 21:03:10,634 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 21:03:10,634 INFO L82 GeneralOperation]: Start removeDead. Operand has 416 places, 468 transitions, 966 flow [2023-08-31 21:03:10,640 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 416 places, 468 transitions, 966 flow [2023-08-31 21:03:10,641 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 21:03:10,641 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 416 places, 468 transitions, 966 flow [2023-08-31 21:03:10,641 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 416 places, 468 transitions, 966 flow [2023-08-31 21:03:10,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 416 places, 468 transitions, 966 flow [2023-08-31 21:03:10,766 INFO L130 PetriNetUnfolder]: 110/898 cut-off events. [2023-08-31 21:03:10,766 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 21:03:10,787 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 21:03:10,833 INFO L119 LiptonReduction]: Number of co-enabled transitions 135138 [2023-08-31 21:03:14,540 INFO L134 LiptonReduction]: Checked pairs total: 496005 [2023-08-31 21:03:14,540 INFO L136 LiptonReduction]: Total number of compositions: 276 [2023-08-31 21:03:14,542 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 21:03:14,542 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;@770556f4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 21:03:14,542 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 21:03:14,561 INFO L130 PetriNetUnfolder]: 37/223 cut-off events. [2023-08-31 21:03:14,562 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-31 21:03:14,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:03:14,562 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-31 21:03:14,562 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:03:14,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:03:14,563 INFO L85 PathProgramCache]: Analyzing trace with hash 858079861, now seen corresponding path program 1 times [2023-08-31 21:03:14,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:03:14,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406343985] [2023-08-31 21:03:14,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:03:14,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:03:14,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:03:14,633 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 21:03:14,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:03:14,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406343985] [2023-08-31 21:03:14,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406343985] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 21:03:14,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 21:03:14,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 21:03:14,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7559784] [2023-08-31 21:03:14,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 21:03:14,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 21:03:14,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:03:14,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 21:03:14,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 21:03:14,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 403 out of 744 [2023-08-31 21:03:14,645 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 21:03:14,645 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:03:14,645 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 403 of 744 [2023-08-31 21:03:14,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:04:18,465 INFO L130 PetriNetUnfolder]: 402738/765384 cut-off events. [2023-08-31 21:04:18,465 INFO L131 PetriNetUnfolder]: For 5313/5871 co-relation queries the response was YES. [2023-08-31 21:04:20,797 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 21:04:21,550 INFO L137 encePairwiseOnDemand]: 700/744 looper letters, 59 selfloop transitions, 2 changer transitions 59/212 dead transitions. [2023-08-31 21:04:21,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 212 transitions, 620 flow [2023-08-31 21:04:21,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 21:04:21,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 21:04:21,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1334 transitions. [2023-08-31 21:04:21,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5976702508960573 [2023-08-31 21:04:21,556 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1334 transitions. [2023-08-31 21:04:21,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1334 transitions. [2023-08-31 21:04:21,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:04:21,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1334 transitions. [2023-08-31 21:04:21,560 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 21:04:21,563 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 21:04:21,564 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 21:04:21,564 INFO L175 Difference]: Start difference. First operand has 210 places, 252 transitions, 534 flow. Second operand 3 states and 1334 transitions. [2023-08-31 21:04:21,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 212 transitions, 620 flow [2023-08-31 21:04:21,569 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 21:04:21,572 INFO L231 Difference]: Finished difference. Result has 213 places, 153 transitions, 337 flow [2023-08-31 21:04:21,572 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 21:04:21,573 INFO L281 CegarLoopForPetriNet]: 210 programPoint places, 3 predicate places. [2023-08-31 21:04:21,573 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 153 transitions, 337 flow [2023-08-31 21:04:21,574 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 21:04:21,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:04:21,574 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 21:04:21,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 21:04:21,576 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:04:21,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:04:21,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1039074224, now seen corresponding path program 1 times [2023-08-31 21:04:21,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:04:21,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289374823] [2023-08-31 21:04:21,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:04:21,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:04:21,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:04:21,612 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 21:04:21,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:04:21,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289374823] [2023-08-31 21:04:21,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289374823] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 21:04:21,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524537650] [2023-08-31 21:04:21,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:04:21,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:04:21,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:04:21,616 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 21:04:21,617 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 21:04:21,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:04:21,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 21:04:21,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 21:04:21,717 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 21:04:21,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 21:04:21,730 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 21:04:21,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524537650] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 21:04:21,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 21:04:21,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 21:04:21,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445875279] [2023-08-31 21:04:21,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 21:04:21,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 21:04:21,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:04:21,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 21:04:21,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 21:04:21,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 402 out of 744 [2023-08-31 21:04:21,751 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 21:04:21,751 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:04:21,751 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 402 of 744 [2023-08-31 21:04:21,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:04:30,511 INFO L130 PetriNetUnfolder]: 66466/130727 cut-off events. [2023-08-31 21:04:30,511 INFO L131 PetriNetUnfolder]: For 2164/2164 co-relation queries the response was YES. [2023-08-31 21:04:30,809 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 21:04:31,222 INFO L137 encePairwiseOnDemand]: 741/744 looper letters, 59 selfloop transitions, 5 changer transitions 0/156 dead transitions. [2023-08-31 21:04:31,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 156 transitions, 477 flow [2023-08-31 21:04:31,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 21:04:31,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 21:04:31,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2479 transitions. [2023-08-31 21:04:31,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.555331541218638 [2023-08-31 21:04:31,228 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2479 transitions. [2023-08-31 21:04:31,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2479 transitions. [2023-08-31 21:04:31,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:04:31,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2479 transitions. [2023-08-31 21:04:31,234 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 21:04:31,239 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 21:04:31,240 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 21:04:31,240 INFO L175 Difference]: Start difference. First operand has 213 places, 153 transitions, 337 flow. Second operand 6 states and 2479 transitions. [2023-08-31 21:04:31,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 156 transitions, 477 flow [2023-08-31 21:04:31,243 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 21:04:31,245 INFO L231 Difference]: Finished difference. Result has 165 places, 156 transitions, 363 flow [2023-08-31 21:04:31,245 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 21:04:31,247 INFO L281 CegarLoopForPetriNet]: 210 programPoint places, -45 predicate places. [2023-08-31 21:04:31,247 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 156 transitions, 363 flow [2023-08-31 21:04:31,248 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 21:04:31,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:04:31,248 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-31 21:04:31,257 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 21:04:31,454 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 21:04:31,455 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:04:31,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:04:31,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1832018229, now seen corresponding path program 2 times [2023-08-31 21:04:31,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:04:31,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578151077] [2023-08-31 21:04:31,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:04:31,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:04:31,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:04:31,537 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 21:04:31,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:04:31,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578151077] [2023-08-31 21:04:31,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578151077] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 21:04:31,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703042449] [2023-08-31 21:04:31,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 21:04:31,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:04:31,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:04:31,539 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 21:04:31,542 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 21:04:31,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 21:04:31,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 21:04:31,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 21:04:31,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 21:04:31,650 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 21:04:31,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 21:04:31,688 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 21:04:31,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703042449] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 21:04:31,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 21:04:31,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-31 21:04:31,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205663996] [2023-08-31 21:04:31,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 21:04:31,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 21:04:31,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:04:31,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 21:04:31,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-31 21:04:31,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 402 out of 744 [2023-08-31 21:04:31,925 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 21:04:31,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:04:31,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 402 of 744 [2023-08-31 21:04:31,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:04:41,736 INFO L130 PetriNetUnfolder]: 66466/130733 cut-off events. [2023-08-31 21:04:41,736 INFO L131 PetriNetUnfolder]: For 1028/1028 co-relation queries the response was YES. [2023-08-31 21:04:42,141 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 21:04:42,399 INFO L137 encePairwiseOnDemand]: 741/744 looper letters, 59 selfloop transitions, 11 changer transitions 0/162 dead transitions. [2023-08-31 21:04:42,399 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 162 transitions, 539 flow [2023-08-31 21:04:42,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 21:04:42,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 21:04:42,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 4900 transitions. [2023-08-31 21:04:42,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5488351254480287 [2023-08-31 21:04:42,409 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 4900 transitions. [2023-08-31 21:04:42,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 4900 transitions. [2023-08-31 21:04:42,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:04:42,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 4900 transitions. [2023-08-31 21:04:42,418 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 21:04:42,427 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 21:04:42,429 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 21:04:42,429 INFO L175 Difference]: Start difference. First operand has 165 places, 156 transitions, 363 flow. Second operand 12 states and 4900 transitions. [2023-08-31 21:04:42,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 162 transitions, 539 flow [2023-08-31 21:04:42,430 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 21:04:42,432 INFO L231 Difference]: Finished difference. Result has 181 places, 162 transitions, 433 flow [2023-08-31 21:04:42,432 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 21:04:42,433 INFO L281 CegarLoopForPetriNet]: 210 programPoint places, -29 predicate places. [2023-08-31 21:04:42,433 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 162 transitions, 433 flow [2023-08-31 21:04:42,434 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 21:04:42,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:04:42,435 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-31 21:04:42,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 21:04:42,639 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 21:04:42,640 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:04:42,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:04:42,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1606941525, now seen corresponding path program 3 times [2023-08-31 21:04:42,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:04:42,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94219690] [2023-08-31 21:04:42,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:04:42,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:04:42,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:04:42,662 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 21:04:42,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:04:42,690 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 21:04:42,690 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 21:04:42,691 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 21:04:42,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 21:04:42,691 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-31 21:04:42,692 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 21:04:42,692 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 21:04:42,692 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-31 21:04:42,743 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-31 21:04:42,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 507 places, 571 transitions, 1186 flow [2023-08-31 21:04:43,081 INFO L130 PetriNetUnfolder]: 157/1271 cut-off events. [2023-08-31 21:04:43,082 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-31 21:04:43,110 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 21:04:43,110 INFO L82 GeneralOperation]: Start removeDead. Operand has 507 places, 571 transitions, 1186 flow [2023-08-31 21:04:43,117 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 507 places, 571 transitions, 1186 flow [2023-08-31 21:04:43,118 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 21:04:43,118 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 507 places, 571 transitions, 1186 flow [2023-08-31 21:04:43,118 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 507 places, 571 transitions, 1186 flow [2023-08-31 21:04:43,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 507 places, 571 transitions, 1186 flow [2023-08-31 21:04:43,273 INFO L130 PetriNetUnfolder]: 157/1271 cut-off events. [2023-08-31 21:04:43,273 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-31 21:04:43,301 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 21:04:43,409 INFO L119 LiptonReduction]: Number of co-enabled transitions 222200 [2023-08-31 21:04:47,573 INFO L134 LiptonReduction]: Checked pairs total: 922994 [2023-08-31 21:04:47,573 INFO L136 LiptonReduction]: Total number of compositions: 336 [2023-08-31 21:04:47,574 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 21:04:47,575 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;@770556f4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 21:04:47,575 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 21:04:47,592 INFO L130 PetriNetUnfolder]: 56/343 cut-off events. [2023-08-31 21:04:47,593 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 21:04:47,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:04:47,593 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 21:04:47,593 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:04:47,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:04:47,593 INFO L85 PathProgramCache]: Analyzing trace with hash -320121765, now seen corresponding path program 1 times [2023-08-31 21:04:47,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:04:47,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272570164] [2023-08-31 21:04:47,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:04:47,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:04:47,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:04:47,635 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 21:04:47,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:04:47,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272570164] [2023-08-31 21:04:47,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272570164] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 21:04:47,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 21:04:47,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 21:04:47,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130571236] [2023-08-31 21:04:47,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 21:04:47,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 21:04:47,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:04:47,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 21:04:47,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 21:04:47,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 491 out of 907 [2023-08-31 21:04:47,648 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 21:04:47,648 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:04:47,648 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 491 of 907 [2023-08-31 21:04:47,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand