./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_73-funloop_hard_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) 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/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_73-funloop_hard_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c8af2e9e80aefb6a93651d6c869df13510f679bd9566c8571973545c9393aab5 --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 [2023-09-01 00:49:31,878 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 00:49:31,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 00:49:31,918 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 00:49:31,919 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 00:49:31,923 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 00:49:31,925 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 00:49:31,927 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 00:49:31,929 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 00:49:31,935 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 00:49:31,936 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 00:49:31,939 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 00:49:31,939 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 00:49:31,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 00:49:31,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 00:49:31,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 00:49:31,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 00:49:31,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 00:49:31,952 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 00:49:31,959 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 00:49:31,960 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 00:49:31,961 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 00:49:31,962 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 00:49:31,963 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 00:49:31,965 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 00:49:31,966 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 00:49:31,966 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 00:49:31,968 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 00:49:31,968 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 00:49:31,969 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 00:49:31,969 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 00:49:31,975 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 00:49:31,976 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 00:49:31,977 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 00:49:31,978 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 00:49:31,978 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 00:49:31,979 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 00:49:31,979 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 00:49:31,979 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 00:49:31,980 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 00:49:31,981 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 00:49:31,982 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 00:49:32,019 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 00:49:32,019 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 00:49:32,020 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 00:49:32,020 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 00:49:32,021 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 00:49:32,021 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 00:49:32,022 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 00:49:32,022 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 00:49:32,022 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 00:49:32,023 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 00:49:32,023 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 00:49:32,024 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 00:49:32,024 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 00:49:32,024 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 00:49:32,024 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 00:49:32,024 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 00:49:32,025 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 00:49:32,025 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 00:49:32,025 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 00:49:32,025 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 00:49:32,025 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 00:49:32,026 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 00:49:32,026 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 00:49:32,026 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 00:49:32,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 00:49:32,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 00:49:32,027 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 00:49:32,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 00:49:32,027 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 00:49:32,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 00:49:32,027 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 00:49:32,028 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 00:49:32,028 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 00:49:32,028 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 00:49:32,028 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8af2e9e80aefb6a93651d6c869df13510f679bd9566c8571973545c9393aab5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 00:49:32,293 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 00:49:32,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 00:49:32,318 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 00:49:32,319 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 00:49:32,320 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 00:49:32,321 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_73-funloop_hard_racefree.i [2023-09-01 00:49:33,529 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 00:49:33,773 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 00:49:33,773 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_73-funloop_hard_racefree.i [2023-09-01 00:49:33,795 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dd9f43a7/329888cbe5b248f4861f39941ab4467d/FLAG5288a0645 [2023-09-01 00:49:33,815 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dd9f43a7/329888cbe5b248f4861f39941ab4467d [2023-09-01 00:49:33,817 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 00:49:33,818 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 00:49:33,819 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 00:49:33,819 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 00:49:33,821 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 00:49:33,822 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:49:33" (1/1) ... [2023-09-01 00:49:33,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@662d73f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:49:33, skipping insertion in model container [2023-09-01 00:49:33,823 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:49:33" (1/1) ... [2023-09-01 00:49:33,828 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 00:49:33,885 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 00:49:34,330 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_73-funloop_hard_racefree.i[41323,41336] [2023-09-01 00:49:34,370 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 00:49:34,394 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 00:49:34,439 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_73-funloop_hard_racefree.i[41323,41336] [2023-09-01 00:49:34,462 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 00:49:34,549 INFO L208 MainTranslator]: Completed translation [2023-09-01 00:49:34,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:49:34 WrapperNode [2023-09-01 00:49:34,550 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 00:49:34,551 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 00:49:34,551 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 00:49:34,552 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 00:49:34,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:49:34" (1/1) ... [2023-09-01 00:49:34,585 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:49:34" (1/1) ... [2023-09-01 00:49:34,616 INFO L138 Inliner]: procedures = 271, calls = 41, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 250 [2023-09-01 00:49:34,617 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 00:49:34,618 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 00:49:34,618 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 00:49:34,618 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 00:49:34,625 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:49:34" (1/1) ... [2023-09-01 00:49:34,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:49:34" (1/1) ... [2023-09-01 00:49:34,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:49:34" (1/1) ... [2023-09-01 00:49:34,632 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:49:34" (1/1) ... [2023-09-01 00:49:34,640 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:49:34" (1/1) ... [2023-09-01 00:49:34,646 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:49:34" (1/1) ... [2023-09-01 00:49:34,648 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:49:34" (1/1) ... [2023-09-01 00:49:34,649 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:49:34" (1/1) ... [2023-09-01 00:49:34,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 00:49:34,653 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 00:49:34,653 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 00:49:34,653 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 00:49:34,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:49:34" (1/1) ... [2023-09-01 00:49:34,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 00:49:34,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:49:34,702 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) [2023-09-01 00:49:34,725 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 [2023-09-01 00:49:34,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 00:49:34,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 00:49:34,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 00:49:34,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 00:49:34,739 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 00:49:34,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 00:49:34,739 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-09-01 00:49:34,739 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-09-01 00:49:34,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 00:49:34,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 00:49:34,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 00:49:34,741 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 00:49:34,901 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 00:49:34,905 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 00:49:35,233 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 00:49:35,252 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 00:49:35,252 INFO L302 CfgBuilder]: Removed 35 assume(true) statements. [2023-09-01 00:49:35,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:49:35 BoogieIcfgContainer [2023-09-01 00:49:35,255 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 00:49:35,257 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 00:49:35,257 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 00:49:35,259 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 00:49:35,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 12:49:33" (1/3) ... [2023-09-01 00:49:35,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25766cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:49:35, skipping insertion in model container [2023-09-01 00:49:35,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:49:34" (2/3) ... [2023-09-01 00:49:35,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25766cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:49:35, skipping insertion in model container [2023-09-01 00:49:35,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:49:35" (3/3) ... [2023-09-01 00:49:35,262 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_73-funloop_hard_racefree.i [2023-09-01 00:49:35,276 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 00:49:35,276 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2023-09-01 00:49:35,276 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 00:49:35,369 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-09-01 00:49:35,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 242 places, 284 transitions, 576 flow [2023-09-01 00:49:35,507 INFO L130 PetriNetUnfolder]: 73/446 cut-off events. [2023-09-01 00:49:35,508 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 00:49:35,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 446 events. 73/446 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2298 event pairs, 0 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 246. Up to 8 conditions per place. [2023-09-01 00:49:35,521 INFO L82 GeneralOperation]: Start removeDead. Operand has 242 places, 284 transitions, 576 flow [2023-09-01 00:49:35,527 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 238 places, 279 transitions, 563 flow [2023-09-01 00:49:35,531 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:49:35,539 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 238 places, 279 transitions, 563 flow [2023-09-01 00:49:35,541 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 238 places, 279 transitions, 563 flow [2023-09-01 00:49:35,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 238 places, 279 transitions, 563 flow [2023-09-01 00:49:35,594 INFO L130 PetriNetUnfolder]: 72/441 cut-off events. [2023-09-01 00:49:35,595 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:49:35,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 446 conditions, 441 events. 72/441 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2243 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 246. Up to 8 conditions per place. [2023-09-01 00:49:35,609 INFO L119 LiptonReduction]: Number of co-enabled transitions 26544 [2023-09-01 00:49:39,680 INFO L134 LiptonReduction]: Checked pairs total: 51974 [2023-09-01 00:49:39,681 INFO L136 LiptonReduction]: Total number of compositions: 254 [2023-09-01 00:49:39,694 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:49:39,700 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@2e80a89d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:49:39,700 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:49:39,709 INFO L130 PetriNetUnfolder]: 16/73 cut-off events. [2023-09-01 00:49:39,709 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:49:39,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:49:39,710 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-09-01 00:49:39,711 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:49:39,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:49:39,715 INFO L85 PathProgramCache]: Analyzing trace with hash -422786523, now seen corresponding path program 1 times [2023-09-01 00:49:39,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:49:39,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351330105] [2023-09-01 00:49:39,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:49:39,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:49:39,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:49:39,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:49:39,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:49:39,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351330105] [2023-09-01 00:49:39,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351330105] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:49:39,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:49:39,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:49:39,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060201699] [2023-09-01 00:49:39,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:49:39,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:49:39,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:49:40,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:49:40,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:49:40,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 538 [2023-09-01 00:49:40,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 132 transitions, 269 flow. Second operand has 3 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 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) [2023-09-01 00:49:40,066 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:49:40,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 538 [2023-09-01 00:49:40,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:49:40,414 INFO L130 PetriNetUnfolder]: 1057/2314 cut-off events. [2023-09-01 00:49:40,415 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:49:40,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4303 conditions, 2314 events. 1057/2314 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 16716 event pairs, 900 based on Foata normal form. 180/1663 useless extension candidates. Maximal degree in co-relation 4184. Up to 1982 conditions per place. [2023-09-01 00:49:40,423 INFO L137 encePairwiseOnDemand]: 492/538 looper letters, 29 selfloop transitions, 2 changer transitions 51/90 dead transitions. [2023-09-01 00:49:40,423 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 90 transitions, 329 flow [2023-09-01 00:49:40,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 00:49:40,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 00:49:40,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 827 transitions. [2023-09-01 00:49:40,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5123915737298637 [2023-09-01 00:49:40,439 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 827 transitions. [2023-09-01 00:49:40,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 827 transitions. [2023-09-01 00:49:40,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:49:40,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 827 transitions. [2023-09-01 00:49:40,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 275.6666666666667) internal successors, (827), 3 states have internal predecessors, (827), 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) [2023-09-01 00:49:40,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 538.0) internal successors, (2152), 4 states have internal predecessors, (2152), 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) [2023-09-01 00:49:40,457 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 538.0) internal successors, (2152), 4 states have internal predecessors, (2152), 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) [2023-09-01 00:49:40,459 INFO L175 Difference]: Start difference. First operand has 98 places, 132 transitions, 269 flow. Second operand 3 states and 827 transitions. [2023-09-01 00:49:40,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 90 transitions, 329 flow [2023-09-01 00:49:40,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 90 transitions, 329 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 00:49:40,464 INFO L231 Difference]: Finished difference. Result has 89 places, 39 transitions, 93 flow [2023-09-01 00:49:40,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=89, PETRI_TRANSITIONS=39} [2023-09-01 00:49:40,469 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, -9 predicate places. [2023-09-01 00:49:40,470 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 39 transitions, 93 flow [2023-09-01 00:49:40,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 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) [2023-09-01 00:49:40,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:49:40,471 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-09-01 00:49:40,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 00:49:40,472 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:49:40,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:49:40,472 INFO L85 PathProgramCache]: Analyzing trace with hash -730904480, now seen corresponding path program 1 times [2023-09-01 00:49:40,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:49:40,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987144820] [2023-09-01 00:49:40,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:49:40,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:49:40,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:49:40,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:49:40,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:49:40,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987144820] [2023-09-01 00:49:40,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987144820] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:49:40,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096695671] [2023-09-01 00:49:40,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:49:40,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:49:40,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:49:40,601 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) [2023-09-01 00:49:40,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 00:49:40,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:49:40,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 00:49:40,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:49:40,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:49:40,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:49:40,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:49:40,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096695671] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:49:40,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:49:40,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 00:49:40,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336882130] [2023-09-01 00:49:40,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:49:40,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 00:49:40,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:49:40,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 00:49:40,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 00:49:40,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 538 [2023-09-01 00:49:40,810 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 39 transitions, 93 flow. Second operand has 7 states, 7 states have (on average 237.57142857142858) internal successors, (1663), 7 states have internal predecessors, (1663), 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) [2023-09-01 00:49:40,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:49:40,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 538 [2023-09-01 00:49:40,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:49:40,941 INFO L130 PetriNetUnfolder]: 113/287 cut-off events. [2023-09-01 00:49:40,941 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:49:40,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 547 conditions, 287 events. 113/287 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1203 event pairs, 100 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 535. Up to 240 conditions per place. [2023-09-01 00:49:40,943 INFO L137 encePairwiseOnDemand]: 535/538 looper letters, 29 selfloop transitions, 5 changer transitions 0/42 dead transitions. [2023-09-01 00:49:40,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 42 transitions, 173 flow [2023-09-01 00:49:40,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 00:49:40,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 00:49:40,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1453 transitions. [2023-09-01 00:49:40,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45012391573729865 [2023-09-01 00:49:40,947 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1453 transitions. [2023-09-01 00:49:40,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1453 transitions. [2023-09-01 00:49:40,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:49:40,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1453 transitions. [2023-09-01 00:49:40,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 242.16666666666666) internal successors, (1453), 6 states have internal predecessors, (1453), 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) [2023-09-01 00:49:40,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 538.0) internal successors, (3766), 7 states have internal predecessors, (3766), 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) [2023-09-01 00:49:40,958 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 538.0) internal successors, (3766), 7 states have internal predecessors, (3766), 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) [2023-09-01 00:49:40,958 INFO L175 Difference]: Start difference. First operand has 89 places, 39 transitions, 93 flow. Second operand 6 states and 1453 transitions. [2023-09-01 00:49:40,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 42 transitions, 173 flow [2023-09-01 00:49:40,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 42 transitions, 169 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 00:49:40,961 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 125 flow [2023-09-01 00:49:40,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=125, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2023-09-01 00:49:40,962 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, -50 predicate places. [2023-09-01 00:49:40,962 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 125 flow [2023-09-01 00:49:40,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 237.57142857142858) internal successors, (1663), 7 states have internal predecessors, (1663), 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) [2023-09-01 00:49:40,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:49:40,963 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-09-01 00:49:40,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 00:49:41,168 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 [2023-09-01 00:49:41,169 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:49:41,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:49:41,169 INFO L85 PathProgramCache]: Analyzing trace with hash 2056782053, now seen corresponding path program 2 times [2023-09-01 00:49:41,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:49:41,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940106177] [2023-09-01 00:49:41,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:49:41,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:49:41,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:49:41,313 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:49:41,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:49:41,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940106177] [2023-09-01 00:49:41,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940106177] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:49:41,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324399219] [2023-09-01 00:49:41,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 00:49:41,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:49:41,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:49:41,319 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) [2023-09-01 00:49:41,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 00:49:41,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 00:49:41,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 00:49:41,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 00:49:41,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:49:41,408 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:49:41,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:49:41,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:49:41,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324399219] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:49:41,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:49:41,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 00:49:41,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349340743] [2023-09-01 00:49:41,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:49:41,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 00:49:41,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:49:41,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 00:49:41,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 00:49:41,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 538 [2023-09-01 00:49:41,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 125 flow. Second operand has 13 states, 13 states have (on average 237.30769230769232) internal successors, (3085), 13 states have internal predecessors, (3085), 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) [2023-09-01 00:49:41,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:49:41,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 538 [2023-09-01 00:49:41,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:49:41,595 INFO L130 PetriNetUnfolder]: 113/293 cut-off events. [2023-09-01 00:49:41,595 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-09-01 00:49:41,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 293 events. 113/293 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1203 event pairs, 100 based on Foata normal form. 6/173 useless extension candidates. Maximal degree in co-relation 526. Up to 240 conditions per place. [2023-09-01 00:49:41,597 INFO L137 encePairwiseOnDemand]: 535/538 looper letters, 29 selfloop transitions, 11 changer transitions 0/48 dead transitions. [2023-09-01 00:49:41,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 48 transitions, 241 flow [2023-09-01 00:49:41,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 00:49:41,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 00:49:41,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2878 transitions. [2023-09-01 00:49:41,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4457868649318463 [2023-09-01 00:49:41,604 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2878 transitions. [2023-09-01 00:49:41,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2878 transitions. [2023-09-01 00:49:41,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:49:41,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2878 transitions. [2023-09-01 00:49:41,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 239.83333333333334) internal successors, (2878), 12 states have internal predecessors, (2878), 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) [2023-09-01 00:49:41,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 538.0) internal successors, (6994), 13 states have internal predecessors, (6994), 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) [2023-09-01 00:49:41,625 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 538.0) internal successors, (6994), 13 states have internal predecessors, (6994), 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) [2023-09-01 00:49:41,626 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 125 flow. Second operand 12 states and 2878 transitions. [2023-09-01 00:49:41,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 48 transitions, 241 flow [2023-09-01 00:49:41,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 48 transitions, 227 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 00:49:41,629 INFO L231 Difference]: Finished difference. Result has 64 places, 48 transitions, 195 flow [2023-09-01 00:49:41,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=195, PETRI_PLACES=64, PETRI_TRANSITIONS=48} [2023-09-01 00:49:41,631 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, -34 predicate places. [2023-09-01 00:49:41,631 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 48 transitions, 195 flow [2023-09-01 00:49:41,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 237.30769230769232) internal successors, (3085), 13 states have internal predecessors, (3085), 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) [2023-09-01 00:49:41,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:49:41,633 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-09-01 00:49:41,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 00:49:41,841 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 [2023-09-01 00:49:41,841 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:49:41,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:49:41,842 INFO L85 PathProgramCache]: Analyzing trace with hash -173261051, now seen corresponding path program 3 times [2023-09-01 00:49:41,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:49:41,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698464590] [2023-09-01 00:49:41,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:49:41,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:49:41,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:49:41,882 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:49:41,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:49:41,940 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:49:41,940 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:49:41,945 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:49:41,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 00:49:41,947 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 00:49:41,949 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:49:41,950 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:49:41,950 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 00:49:42,009 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 00:49:42,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 310 places, 365 transitions, 748 flow [2023-09-01 00:49:42,084 INFO L130 PetriNetUnfolder]: 118/718 cut-off events. [2023-09-01 00:49:42,084 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 00:49:42,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 732 conditions, 718 events. 118/718 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4112 event pairs, 0 based on Foata normal form. 0/490 useless extension candidates. Maximal degree in co-relation 448. Up to 12 conditions per place. [2023-09-01 00:49:42,094 INFO L82 GeneralOperation]: Start removeDead. Operand has 310 places, 365 transitions, 748 flow [2023-09-01 00:49:42,100 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 310 places, 365 transitions, 748 flow [2023-09-01 00:49:42,101 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:49:42,101 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 310 places, 365 transitions, 748 flow [2023-09-01 00:49:42,101 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 310 places, 365 transitions, 748 flow [2023-09-01 00:49:42,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 310 places, 365 transitions, 748 flow [2023-09-01 00:49:42,185 INFO L130 PetriNetUnfolder]: 118/718 cut-off events. [2023-09-01 00:49:42,185 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 00:49:42,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 732 conditions, 718 events. 118/718 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4112 event pairs, 0 based on Foata normal form. 0/490 useless extension candidates. Maximal degree in co-relation 448. Up to 12 conditions per place. [2023-09-01 00:49:42,218 INFO L119 LiptonReduction]: Number of co-enabled transitions 67308 [2023-09-01 00:49:46,777 INFO L134 LiptonReduction]: Checked pairs total: 142021 [2023-09-01 00:49:46,777 INFO L136 LiptonReduction]: Total number of compositions: 326 [2023-09-01 00:49:46,791 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:49:46,794 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@2e80a89d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:49:46,795 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:49:46,808 INFO L130 PetriNetUnfolder]: 54/217 cut-off events. [2023-09-01 00:49:46,809 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 00:49:46,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:49:46,809 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 00:49:46,809 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:49:46,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:49:46,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1350277324, now seen corresponding path program 1 times [2023-09-01 00:49:46,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:49:46,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640915911] [2023-09-01 00:49:46,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:49:46,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:49:46,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:49:46,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 00:49:46,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:49:46,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640915911] [2023-09-01 00:49:46,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640915911] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:49:46,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:49:46,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:49:46,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386910578] [2023-09-01 00:49:46,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:49:46,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:49:46,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:49:46,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:49:46,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:49:46,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 691 [2023-09-01 00:49:46,869 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 178 transitions, 374 flow. Second operand has 3 states, 3 states have (on average 305.0) internal successors, (915), 3 states have internal predecessors, (915), 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) [2023-09-01 00:49:46,869 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:49:46,869 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 691 [2023-09-01 00:49:46,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:49:52,323 INFO L130 PetriNetUnfolder]: 50358/80318 cut-off events. [2023-09-01 00:49:52,324 INFO L131 PetriNetUnfolder]: For 174/174 co-relation queries the response was YES. [2023-09-01 00:49:52,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152658 conditions, 80318 events. 50358/80318 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 3095. Compared 699756 event pairs, 44992 based on Foata normal form. 6364/59622 useless extension candidates. Maximal degree in co-relation 61755. Up to 72201 conditions per place. [2023-09-01 00:49:52,529 INFO L137 encePairwiseOnDemand]: 635/691 looper letters, 53 selfloop transitions, 2 changer transitions 57/126 dead transitions. [2023-09-01 00:49:52,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 126 transitions, 472 flow [2023-09-01 00:49:52,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 00:49:52,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 00:49:52,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1064 transitions. [2023-09-01 00:49:52,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.513265798359865 [2023-09-01 00:49:52,537 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1064 transitions. [2023-09-01 00:49:52,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1064 transitions. [2023-09-01 00:49:52,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:49:52,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1064 transitions. [2023-09-01 00:49:52,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 354.6666666666667) internal successors, (1064), 3 states have internal predecessors, (1064), 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) [2023-09-01 00:49:52,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 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) [2023-09-01 00:49:52,546 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 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) [2023-09-01 00:49:52,546 INFO L175 Difference]: Start difference. First operand has 132 places, 178 transitions, 374 flow. Second operand 3 states and 1064 transitions. [2023-09-01 00:49:52,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 126 transitions, 472 flow [2023-09-01 00:49:52,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 126 transitions, 472 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 00:49:52,550 INFO L231 Difference]: Finished difference. Result has 123 places, 69 transitions, 160 flow [2023-09-01 00:49:52,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=123, PETRI_TRANSITIONS=69} [2023-09-01 00:49:52,552 INFO L281 CegarLoopForPetriNet]: 132 programPoint places, -9 predicate places. [2023-09-01 00:49:52,552 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 69 transitions, 160 flow [2023-09-01 00:49:52,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 305.0) internal successors, (915), 3 states have internal predecessors, (915), 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) [2023-09-01 00:49:52,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:49:52,553 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-09-01 00:49:52,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 00:49:52,553 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:49:52,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:49:52,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1067613131, now seen corresponding path program 1 times [2023-09-01 00:49:52,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:49:52,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833866855] [2023-09-01 00:49:52,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:49:52,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:49:52,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:49:52,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 00:49:52,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:49:52,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833866855] [2023-09-01 00:49:52,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833866855] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:49:52,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71209382] [2023-09-01 00:49:52,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:49:52,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:49:52,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:49:52,596 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) [2023-09-01 00:49:52,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 00:49:52,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:49:52,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 00:49:52,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:49:52,696 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 00:49:52,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:49:52,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 00:49:52,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71209382] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:49:52,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:49:52,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 00:49:52,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003579601] [2023-09-01 00:49:52,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:49:52,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 00:49:52,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:49:52,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 00:49:52,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 00:49:52,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 691 [2023-09-01 00:49:52,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 69 transitions, 160 flow. Second operand has 7 states, 7 states have (on average 303.7142857142857) internal successors, (2126), 7 states have internal predecessors, (2126), 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) [2023-09-01 00:49:52,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:49:52,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 691 [2023-09-01 00:49:52,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:49:53,494 INFO L130 PetriNetUnfolder]: 5705/9484 cut-off events. [2023-09-01 00:49:53,495 INFO L131 PetriNetUnfolder]: For 76/76 co-relation queries the response was YES. [2023-09-01 00:49:53,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18086 conditions, 9484 events. 5705/9484 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 64742 event pairs, 5182 based on Foata normal form. 0/5810 useless extension candidates. Maximal degree in co-relation 18073. Up to 8496 conditions per place. [2023-09-01 00:49:53,544 INFO L137 encePairwiseOnDemand]: 688/691 looper letters, 53 selfloop transitions, 5 changer transitions 0/72 dead transitions. [2023-09-01 00:49:53,545 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 72 transitions, 288 flow [2023-09-01 00:49:53,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 00:49:53,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 00:49:53,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1873 transitions. [2023-09-01 00:49:53,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4517607332368548 [2023-09-01 00:49:53,551 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1873 transitions. [2023-09-01 00:49:53,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1873 transitions. [2023-09-01 00:49:53,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:49:53,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1873 transitions. [2023-09-01 00:49:53,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 312.1666666666667) internal successors, (1873), 6 states have internal predecessors, (1873), 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) [2023-09-01 00:49:53,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 691.0) internal successors, (4837), 7 states have internal predecessors, (4837), 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) [2023-09-01 00:49:53,563 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 691.0) internal successors, (4837), 7 states have internal predecessors, (4837), 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) [2023-09-01 00:49:53,563 INFO L175 Difference]: Start difference. First operand has 123 places, 69 transitions, 160 flow. Second operand 6 states and 1873 transitions. [2023-09-01 00:49:53,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 72 transitions, 288 flow [2023-09-01 00:49:53,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 72 transitions, 282 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 00:49:53,565 INFO L231 Difference]: Finished difference. Result has 78 places, 72 transitions, 190 flow [2023-09-01 00:49:53,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=190, PETRI_PLACES=78, PETRI_TRANSITIONS=72} [2023-09-01 00:49:53,566 INFO L281 CegarLoopForPetriNet]: 132 programPoint places, -54 predicate places. [2023-09-01 00:49:53,567 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 72 transitions, 190 flow [2023-09-01 00:49:53,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 303.7142857142857) internal successors, (2126), 7 states have internal predecessors, (2126), 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) [2023-09-01 00:49:53,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:49:53,568 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 00:49:53,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 00:49:53,773 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 [2023-09-01 00:49:53,774 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:49:53,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:49:53,774 INFO L85 PathProgramCache]: Analyzing trace with hash -793750284, now seen corresponding path program 2 times [2023-09-01 00:49:53,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:49:53,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561275559] [2023-09-01 00:49:53,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:49:53,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:49:53,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:49:53,858 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 00:49:53,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:49:53,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561275559] [2023-09-01 00:49:53,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561275559] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:49:53,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178898919] [2023-09-01 00:49:53,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 00:49:53,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:49:53,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:49:53,861 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) [2023-09-01 00:49:53,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 00:49:53,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 00:49:53,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 00:49:53,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 00:49:53,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:49:53,968 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 00:49:53,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:49:54,023 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 00:49:54,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178898919] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:49:54,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:49:54,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 00:49:54,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486946592] [2023-09-01 00:49:54,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:49:54,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 00:49:54,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:49:54,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 00:49:54,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 00:49:54,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 691 [2023-09-01 00:49:54,062 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 72 transitions, 190 flow. Second operand has 13 states, 13 states have (on average 303.38461538461536) internal successors, (3944), 13 states have internal predecessors, (3944), 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) [2023-09-01 00:49:54,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:49:54,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 691 [2023-09-01 00:49:54,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:49:54,668 INFO L130 PetriNetUnfolder]: 5705/9490 cut-off events. [2023-09-01 00:49:54,668 INFO L131 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2023-09-01 00:49:54,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18114 conditions, 9490 events. 5705/9490 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 64831 event pairs, 5182 based on Foata normal form. 6/5823 useless extension candidates. Maximal degree in co-relation 18055. Up to 8496 conditions per place. [2023-09-01 00:49:54,697 INFO L137 encePairwiseOnDemand]: 688/691 looper letters, 53 selfloop transitions, 11 changer transitions 0/78 dead transitions. [2023-09-01 00:49:54,698 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 78 transitions, 354 flow [2023-09-01 00:49:54,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 00:49:54,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 00:49:54,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3694 transitions. [2023-09-01 00:49:54,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4454896285576459 [2023-09-01 00:49:54,707 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3694 transitions. [2023-09-01 00:49:54,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3694 transitions. [2023-09-01 00:49:54,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:49:54,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3694 transitions. [2023-09-01 00:49:54,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 307.8333333333333) internal successors, (3694), 12 states have internal predecessors, (3694), 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) [2023-09-01 00:49:54,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 691.0) internal successors, (8983), 13 states have internal predecessors, (8983), 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) [2023-09-01 00:49:54,730 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 691.0) internal successors, (8983), 13 states have internal predecessors, (8983), 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) [2023-09-01 00:49:54,730 INFO L175 Difference]: Start difference. First operand has 78 places, 72 transitions, 190 flow. Second operand 12 states and 3694 transitions. [2023-09-01 00:49:54,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 78 transitions, 354 flow [2023-09-01 00:49:54,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 78 transitions, 340 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 00:49:54,732 INFO L231 Difference]: Finished difference. Result has 94 places, 78 transitions, 260 flow [2023-09-01 00:49:54,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=260, PETRI_PLACES=94, PETRI_TRANSITIONS=78} [2023-09-01 00:49:54,733 INFO L281 CegarLoopForPetriNet]: 132 programPoint places, -38 predicate places. [2023-09-01 00:49:54,733 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 78 transitions, 260 flow [2023-09-01 00:49:54,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 303.38461538461536) internal successors, (3944), 13 states have internal predecessors, (3944), 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) [2023-09-01 00:49:54,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:49:54,735 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 00:49:54,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 00:49:54,943 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 [2023-09-01 00:49:54,943 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:49:54,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:49:54,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1604392340, now seen corresponding path program 3 times [2023-09-01 00:49:54,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:49:54,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405270012] [2023-09-01 00:49:54,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:49:54,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:49:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:49:54,977 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:49:54,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:49:55,002 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:49:55,003 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:49:55,003 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:49:55,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 00:49:55,004 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 00:49:55,004 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:49:55,005 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:49:55,005 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-09-01 00:49:55,039 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 00:49:55,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 378 places, 446 transitions, 922 flow [2023-09-01 00:49:55,155 INFO L130 PetriNetUnfolder]: 168/1031 cut-off events. [2023-09-01 00:49:55,155 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-09-01 00:49:55,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1059 conditions, 1031 events. 168/1031 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 6243 event pairs, 1 based on Foata normal form. 0/706 useless extension candidates. Maximal degree in co-relation 726. Up to 16 conditions per place. [2023-09-01 00:49:55,171 INFO L82 GeneralOperation]: Start removeDead. Operand has 378 places, 446 transitions, 922 flow [2023-09-01 00:49:55,180 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 378 places, 446 transitions, 922 flow [2023-09-01 00:49:55,180 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:49:55,180 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 378 places, 446 transitions, 922 flow [2023-09-01 00:49:55,181 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 378 places, 446 transitions, 922 flow [2023-09-01 00:49:55,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 378 places, 446 transitions, 922 flow [2023-09-01 00:49:55,291 INFO L130 PetriNetUnfolder]: 168/1031 cut-off events. [2023-09-01 00:49:55,291 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-09-01 00:49:55,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1059 conditions, 1031 events. 168/1031 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 6243 event pairs, 1 based on Foata normal form. 0/706 useless extension candidates. Maximal degree in co-relation 726. Up to 16 conditions per place. [2023-09-01 00:49:55,354 INFO L119 LiptonReduction]: Number of co-enabled transitions 120396 [2023-09-01 00:50:00,556 INFO L134 LiptonReduction]: Checked pairs total: 261361 [2023-09-01 00:50:00,556 INFO L136 LiptonReduction]: Total number of compositions: 394 [2023-09-01 00:50:00,558 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:50:00,559 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@2e80a89d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:50:00,559 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:50:00,588 INFO L130 PetriNetUnfolder]: 91/349 cut-off events. [2023-09-01 00:50:00,589 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 00:50:00,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:50:00,589 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 00:50:00,589 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:50:00,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:50:00,590 INFO L85 PathProgramCache]: Analyzing trace with hash -6237428, now seen corresponding path program 1 times [2023-09-01 00:50:00,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:50:00,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051045241] [2023-09-01 00:50:00,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:50:00,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:50:00,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:50:00,616 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 00:50:00,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:50:00,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051045241] [2023-09-01 00:50:00,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051045241] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:50:00,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:50:00,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:50:00,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318668405] [2023-09-01 00:50:00,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:50:00,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:50:00,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:50:00,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:50:00,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:50:00,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 369 out of 840 [2023-09-01 00:50:00,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 220 transitions, 470 flow. Second operand has 3 states, 3 states have (on average 371.3333333333333) internal successors, (1114), 3 states have internal predecessors, (1114), 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) [2023-09-01 00:50:00,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:50:00,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 369 of 840 [2023-09-01 00:50:00,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand