./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-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 ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fa97ad6141e9aa8818b694f4968e766701fe7261f516cd86f7a15e5cf1a3d14d --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 04:57:39,717 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 04:57:39,719 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 04:57:39,764 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 04:57:39,765 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 04:57:39,768 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 04:57:39,770 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 04:57:39,772 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 04:57:39,774 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 04:57:39,779 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 04:57:39,780 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 04:57:39,782 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 04:57:39,782 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 04:57:39,784 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 04:57:39,785 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 04:57:39,790 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 04:57:39,791 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 04:57:39,793 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 04:57:39,794 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 04:57:39,799 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 04:57:39,800 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 04:57:39,801 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 04:57:39,812 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 04:57:39,813 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 04:57:39,815 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 04:57:39,815 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 04:57:39,815 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 04:57:39,816 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 04:57:39,816 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 04:57:39,817 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 04:57:39,818 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 04:57:39,819 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 04:57:39,821 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 04:57:39,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 04:57:39,822 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 04:57:39,822 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 04:57:39,823 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 04:57:39,823 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 04:57:39,823 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 04:57:39,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 04:57:39,824 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 04:57:39,826 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-09-01 04:57:39,858 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 04:57:39,859 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 04:57:39,860 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 04:57:39,860 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 04:57:39,861 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 04:57:39,861 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 04:57:39,861 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 04:57:39,862 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 04:57:39,862 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 04:57:39,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 04:57:39,862 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 04:57:39,863 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 04:57:39,863 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 04:57:39,863 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 04:57:39,863 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 04:57:39,863 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 04:57:39,863 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 04:57:39,863 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 04:57:39,864 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-09-01 04:57:39,864 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 04:57:39,864 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 04:57:39,864 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 04:57:39,864 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 04:57:39,864 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 04:57:39,864 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 04:57:39,864 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 04:57:39,864 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:57:39,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 04:57:39,865 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 04:57:39,865 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 04:57:39,865 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 04:57:39,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 04:57:39,865 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 04:57:39,865 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 04:57:39,865 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 04:57:39,865 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 04:57:39,866 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 04:57:39,866 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa97ad6141e9aa8818b694f4968e766701fe7261f516cd86f7a15e5cf1a3d14d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 04:57:40,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 04:57:40,169 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 04:57:40,171 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 04:57:40,172 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 04:57:40,173 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 04:57:40,174 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/26_stack_cas.i [2023-09-01 04:57:41,416 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 04:57:41,634 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 04:57:41,635 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas.i [2023-09-01 04:57:41,648 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0102136c8/1156bcb104d44d11b5d44ce1ac19bd03/FLAG1cdb40520 [2023-09-01 04:57:41,660 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0102136c8/1156bcb104d44d11b5d44ce1ac19bd03 [2023-09-01 04:57:41,662 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 04:57:41,663 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 04:57:41,664 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 04:57:41,664 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 04:57:41,667 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 04:57:41,667 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:57:41" (1/1) ... [2023-09-01 04:57:41,668 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@252e75e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:57:41, skipping insertion in model container [2023-09-01 04:57:41,668 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:57:41" (1/1) ... [2023-09-01 04:57:41,674 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 04:57:41,703 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 04:57:41,996 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas.i[31152,31165] [2023-09-01 04:57:42,003 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:57:42,017 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 04:57:42,074 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas.i[31152,31165] [2023-09-01 04:57:42,090 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:57:42,130 INFO L208 MainTranslator]: Completed translation [2023-09-01 04:57:42,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:57:42 WrapperNode [2023-09-01 04:57:42,131 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 04:57:42,132 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 04:57:42,132 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 04:57:42,132 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 04:57:42,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:57:42" (1/1) ... [2023-09-01 04:57:42,168 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:57:42" (1/1) ... [2023-09-01 04:57:42,205 INFO L138 Inliner]: procedures = 177, calls = 47, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 198 [2023-09-01 04:57:42,206 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 04:57:42,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 04:57:42,207 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 04:57:42,208 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 04:57:42,215 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:57:42" (1/1) ... [2023-09-01 04:57:42,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:57:42" (1/1) ... [2023-09-01 04:57:42,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:57:42" (1/1) ... [2023-09-01 04:57:42,236 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:57:42" (1/1) ... [2023-09-01 04:57:42,241 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:57:42" (1/1) ... [2023-09-01 04:57:42,252 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:57:42" (1/1) ... [2023-09-01 04:57:42,253 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:57:42" (1/1) ... [2023-09-01 04:57:42,263 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:57:42" (1/1) ... [2023-09-01 04:57:42,265 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 04:57:42,266 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 04:57:42,266 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 04:57:42,266 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 04:57:42,267 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:57:42" (1/1) ... [2023-09-01 04:57:42,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:57:42,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:57:42,303 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 04:57:42,328 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 04:57:42,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 04:57:42,339 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-09-01 04:57:42,340 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-09-01 04:57:42,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 04:57:42,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 04:57:42,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 04:57:42,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 04:57:42,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 04:57:42,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 04:57:42,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 04:57:42,342 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 04:57:42,514 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 04:57:42,516 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 04:57:42,891 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 04:57:43,019 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 04:57:43,019 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 04:57:43,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 04:57:43 BoogieIcfgContainer [2023-09-01 04:57:43,022 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 04:57:43,023 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 04:57:43,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 04:57:43,026 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 04:57:43,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 04:57:41" (1/3) ... [2023-09-01 04:57:43,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d552c9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 04:57:43, skipping insertion in model container [2023-09-01 04:57:43,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:57:42" (2/3) ... [2023-09-01 04:57:43,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d552c9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 04:57:43, skipping insertion in model container [2023-09-01 04:57:43,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 04:57:43" (3/3) ... [2023-09-01 04:57:43,028 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas.i [2023-09-01 04:57:43,035 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 04:57:43,044 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 04:57:43,044 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-09-01 04:57:43,044 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 04:57:43,103 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 04:57:43,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 133 transitions, 271 flow [2023-09-01 04:57:43,199 INFO L130 PetriNetUnfolder]: 11/143 cut-off events. [2023-09-01 04:57:43,200 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 04:57:43,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 143 events. 11/143 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 136 event pairs, 0 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 109. Up to 4 conditions per place. [2023-09-01 04:57:43,206 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 133 transitions, 271 flow [2023-09-01 04:57:43,210 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 133 transitions, 271 flow [2023-09-01 04:57:43,213 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:57:43,222 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 133 transitions, 271 flow [2023-09-01 04:57:43,224 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 133 transitions, 271 flow [2023-09-01 04:57:43,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 133 transitions, 271 flow [2023-09-01 04:57:43,247 INFO L130 PetriNetUnfolder]: 11/143 cut-off events. [2023-09-01 04:57:43,247 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 04:57:43,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 143 events. 11/143 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 136 event pairs, 0 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 109. Up to 4 conditions per place. [2023-09-01 04:57:43,250 INFO L119 LiptonReduction]: Number of co-enabled transitions 2522 [2023-09-01 04:57:47,890 INFO L134 LiptonReduction]: Checked pairs total: 3076 [2023-09-01 04:57:47,890 INFO L136 LiptonReduction]: Total number of compositions: 136 [2023-09-01 04:57:47,901 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 04:57:47,906 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@33e1af4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:57:47,907 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 04:57:47,911 INFO L130 PetriNetUnfolder]: 2/13 cut-off events. [2023-09-01 04:57:47,911 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 04:57:47,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:57:47,911 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-09-01 04:57:47,912 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 04:57:47,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:57:47,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1550590541, now seen corresponding path program 1 times [2023-09-01 04:57:47,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:57:47,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884468734] [2023-09-01 04:57:47,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:57:47,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:57:48,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:57:48,081 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 04:57:48,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:57:48,124 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 04:57:48,126 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 04:57:48,127 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 04:57:48,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 04:57:48,129 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 04:57:48,131 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 04:57:48,131 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 04:57:48,131 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 04:57:48,180 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 04:57:48,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 231 transitions, 474 flow [2023-09-01 04:57:48,237 INFO L130 PetriNetUnfolder]: 21/253 cut-off events. [2023-09-01 04:57:48,237 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 04:57:48,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 253 events. 21/253 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 535 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 206. Up to 6 conditions per place. [2023-09-01 04:57:48,241 INFO L82 GeneralOperation]: Start removeDead. Operand has 217 places, 231 transitions, 474 flow [2023-09-01 04:57:48,243 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 217 places, 231 transitions, 474 flow [2023-09-01 04:57:48,243 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:57:48,244 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 217 places, 231 transitions, 474 flow [2023-09-01 04:57:48,244 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 217 places, 231 transitions, 474 flow [2023-09-01 04:57:48,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 231 transitions, 474 flow [2023-09-01 04:57:48,287 INFO L130 PetriNetUnfolder]: 21/253 cut-off events. [2023-09-01 04:57:48,287 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 04:57:48,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 253 events. 21/253 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 535 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 206. Up to 6 conditions per place. [2023-09-01 04:57:48,307 INFO L119 LiptonReduction]: Number of co-enabled transitions 24056 [2023-09-01 04:57:53,515 INFO L134 LiptonReduction]: Checked pairs total: 65438 [2023-09-01 04:57:53,516 INFO L136 LiptonReduction]: Total number of compositions: 183 [2023-09-01 04:57:53,518 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 04:57:53,519 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@33e1af4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:57:53,520 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 04:57:53,524 INFO L130 PetriNetUnfolder]: 3/31 cut-off events. [2023-09-01 04:57:53,524 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 04:57:53,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:57:53,524 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-09-01 04:57:53,525 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 04:57:53,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:57:53,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1068023603, now seen corresponding path program 1 times [2023-09-01 04:57:53,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:57:53,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116725488] [2023-09-01 04:57:53,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:57:53,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:57:53,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:57:53,547 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 04:57:53,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:57:53,566 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 04:57:53,567 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 04:57:53,567 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 04:57:53,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 04:57:53,567 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 04:57:53,568 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 04:57:53,568 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 04:57:53,568 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-09-01 04:57:53,615 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 04:57:53,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 308 places, 329 transitions, 679 flow [2023-09-01 04:57:53,692 INFO L130 PetriNetUnfolder]: 31/363 cut-off events. [2023-09-01 04:57:53,693 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 04:57:53,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 363 events. 31/363 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1085 event pairs, 0 based on Foata normal form. 0/298 useless extension candidates. Maximal degree in co-relation 303. Up to 8 conditions per place. [2023-09-01 04:57:53,698 INFO L82 GeneralOperation]: Start removeDead. Operand has 308 places, 329 transitions, 679 flow [2023-09-01 04:57:53,706 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 308 places, 329 transitions, 679 flow [2023-09-01 04:57:53,706 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:57:53,706 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 308 places, 329 transitions, 679 flow [2023-09-01 04:57:53,707 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 308 places, 329 transitions, 679 flow [2023-09-01 04:57:53,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 308 places, 329 transitions, 679 flow [2023-09-01 04:57:53,766 INFO L130 PetriNetUnfolder]: 31/363 cut-off events. [2023-09-01 04:57:53,766 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 04:57:53,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 363 events. 31/363 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1085 event pairs, 0 based on Foata normal form. 0/298 useless extension candidates. Maximal degree in co-relation 303. Up to 8 conditions per place. [2023-09-01 04:57:53,794 INFO L119 LiptonReduction]: Number of co-enabled transitions 64602 [2023-09-01 04:57:59,999 INFO L134 LiptonReduction]: Checked pairs total: 172575 [2023-09-01 04:57:59,999 INFO L136 LiptonReduction]: Total number of compositions: 247 [2023-09-01 04:58:00,001 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 04:58:00,002 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@33e1af4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:58:00,003 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 04:58:00,009 INFO L130 PetriNetUnfolder]: 4/54 cut-off events. [2023-09-01 04:58:00,009 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 04:58:00,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:58:00,009 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-09-01 04:58:00,010 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 04:58:00,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:58:00,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1213916751, now seen corresponding path program 1 times [2023-09-01 04:58:00,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:58:00,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118777044] [2023-09-01 04:58:00,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:58:00,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:58:00,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:58:00,030 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 04:58:00,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:58:00,048 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 04:58:00,048 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 04:58:00,049 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 04:58:00,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 04:58:00,049 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 04:58:00,050 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 04:58:00,050 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 04:58:00,050 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-09-01 04:58:00,122 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 04:58:00,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 399 places, 427 transitions, 886 flow [2023-09-01 04:58:00,210 INFO L130 PetriNetUnfolder]: 41/473 cut-off events. [2023-09-01 04:58:00,210 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 04:58:00,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 473 events. 41/473 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1679 event pairs, 0 based on Foata normal form. 0/387 useless extension candidates. Maximal degree in co-relation 400. Up to 10 conditions per place. [2023-09-01 04:58:00,222 INFO L82 GeneralOperation]: Start removeDead. Operand has 399 places, 427 transitions, 886 flow [2023-09-01 04:58:00,227 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 399 places, 427 transitions, 886 flow [2023-09-01 04:58:00,228 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:58:00,228 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 399 places, 427 transitions, 886 flow [2023-09-01 04:58:00,228 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 399 places, 427 transitions, 886 flow [2023-09-01 04:58:00,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 399 places, 427 transitions, 886 flow [2023-09-01 04:58:00,321 INFO L130 PetriNetUnfolder]: 41/473 cut-off events. [2023-09-01 04:58:00,322 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 04:58:00,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 473 events. 41/473 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1679 event pairs, 0 based on Foata normal form. 0/387 useless extension candidates. Maximal degree in co-relation 400. Up to 10 conditions per place. [2023-09-01 04:58:00,357 INFO L119 LiptonReduction]: Number of co-enabled transitions 124160 [2023-09-01 04:58:08,558 INFO L134 LiptonReduction]: Checked pairs total: 353281 [2023-09-01 04:58:08,559 INFO L136 LiptonReduction]: Total number of compositions: 325 [2023-09-01 04:58:08,561 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 04:58:08,562 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@33e1af4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:58:08,562 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 04:58:08,572 INFO L130 PetriNetUnfolder]: 8/99 cut-off events. [2023-09-01 04:58:08,572 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 04:58:08,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:58:08,573 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-09-01 04:58:08,573 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 04:58:08,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:58:08,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1783804678, now seen corresponding path program 1 times [2023-09-01 04:58:08,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:58:08,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701512279] [2023-09-01 04:58:08,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:58:08,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:58:08,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:58:08,603 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 04:58:08,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:58:08,652 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 04:58:08,653 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 04:58:08,653 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 04:58:08,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 04:58:08,653 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 04:58:08,654 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 04:58:08,654 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 04:58:08,654 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-09-01 04:58:08,723 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 04:58:08,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 490 places, 525 transitions, 1095 flow [2023-09-01 04:58:08,869 INFO L130 PetriNetUnfolder]: 51/583 cut-off events. [2023-09-01 04:58:08,870 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 04:58:08,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 614 conditions, 583 events. 51/583 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2296 event pairs, 0 based on Foata normal form. 0/476 useless extension candidates. Maximal degree in co-relation 497. Up to 12 conditions per place. [2023-09-01 04:58:08,887 INFO L82 GeneralOperation]: Start removeDead. Operand has 490 places, 525 transitions, 1095 flow [2023-09-01 04:58:08,893 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 490 places, 525 transitions, 1095 flow [2023-09-01 04:58:08,894 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:58:08,894 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 490 places, 525 transitions, 1095 flow [2023-09-01 04:58:08,894 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 490 places, 525 transitions, 1095 flow [2023-09-01 04:58:08,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 490 places, 525 transitions, 1095 flow [2023-09-01 04:58:09,018 INFO L130 PetriNetUnfolder]: 51/583 cut-off events. [2023-09-01 04:58:09,018 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 04:58:09,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 614 conditions, 583 events. 51/583 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2296 event pairs, 0 based on Foata normal form. 0/476 useless extension candidates. Maximal degree in co-relation 497. Up to 12 conditions per place. [2023-09-01 04:58:09,070 INFO L119 LiptonReduction]: Number of co-enabled transitions 202730 [2023-09-01 04:58:19,049 INFO L134 LiptonReduction]: Checked pairs total: 577123 [2023-09-01 04:58:19,049 INFO L136 LiptonReduction]: Total number of compositions: 402 [2023-09-01 04:58:19,051 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 04:58:19,052 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@33e1af4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:58:19,052 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 04:58:19,067 INFO L130 PetriNetUnfolder]: 16/150 cut-off events. [2023-09-01 04:58:19,068 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 04:58:19,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:58:19,068 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:58:19,068 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 04:58:19,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:58:19,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1335391351, now seen corresponding path program 1 times [2023-09-01 04:58:19,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:58:19,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504210750] [2023-09-01 04:58:19,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:58:19,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:58:19,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:58:19,090 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 04:58:19,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:58:19,108 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 04:58:19,109 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 04:58:19,109 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 04:58:19,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 04:58:19,109 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 04:58:19,110 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 04:58:19,110 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 04:58:19,110 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-09-01 04:58:19,179 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 04:58:19,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 581 places, 623 transitions, 1306 flow [2023-09-01 04:58:19,361 INFO L130 PetriNetUnfolder]: 61/693 cut-off events. [2023-09-01 04:58:19,363 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 04:58:19,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 733 conditions, 693 events. 61/693 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2979 event pairs, 0 based on Foata normal form. 0/565 useless extension candidates. Maximal degree in co-relation 602. Up to 14 conditions per place. [2023-09-01 04:58:19,381 INFO L82 GeneralOperation]: Start removeDead. Operand has 581 places, 623 transitions, 1306 flow [2023-09-01 04:58:19,391 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 581 places, 623 transitions, 1306 flow [2023-09-01 04:58:19,393 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:58:19,393 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 581 places, 623 transitions, 1306 flow [2023-09-01 04:58:19,394 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 581 places, 623 transitions, 1306 flow [2023-09-01 04:58:19,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 581 places, 623 transitions, 1306 flow [2023-09-01 04:58:19,582 INFO L130 PetriNetUnfolder]: 61/693 cut-off events. [2023-09-01 04:58:19,582 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 04:58:19,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 733 conditions, 693 events. 61/693 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2979 event pairs, 0 based on Foata normal form. 0/565 useless extension candidates. Maximal degree in co-relation 602. Up to 14 conditions per place. [2023-09-01 04:58:19,659 INFO L119 LiptonReduction]: Number of co-enabled transitions 300312 [2023-09-01 04:58:31,181 INFO L134 LiptonReduction]: Checked pairs total: 873712 [2023-09-01 04:58:31,181 INFO L136 LiptonReduction]: Total number of compositions: 477 [2023-09-01 04:58:31,183 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 04:58:31,184 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@33e1af4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:58:31,184 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 04:58:31,205 INFO L130 PetriNetUnfolder]: 22/199 cut-off events. [2023-09-01 04:58:31,205 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 04:58:31,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:58:31,206 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:58:31,206 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 04:58:31,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:58:31,207 INFO L85 PathProgramCache]: Analyzing trace with hash -13033532, now seen corresponding path program 1 times [2023-09-01 04:58:31,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:58:31,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452453676] [2023-09-01 04:58:31,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:58:31,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:58:31,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:58:31,229 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 04:58:31,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:58:31,249 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 04:58:31,249 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 04:58:31,249 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 04:58:31,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 04:58:31,250 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 04:58:31,250 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 04:58:31,251 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 04:58:31,251 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-09-01 04:58:31,337 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 04:58:31,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 672 places, 721 transitions, 1519 flow [2023-09-01 04:58:31,562 INFO L130 PetriNetUnfolder]: 71/803 cut-off events. [2023-09-01 04:58:31,562 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-09-01 04:58:31,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 853 conditions, 803 events. 71/803 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3649 event pairs, 0 based on Foata normal form. 0/654 useless extension candidates. Maximal degree in co-relation 719. Up to 16 conditions per place. [2023-09-01 04:58:31,582 INFO L82 GeneralOperation]: Start removeDead. Operand has 672 places, 721 transitions, 1519 flow [2023-09-01 04:58:31,589 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 672 places, 721 transitions, 1519 flow [2023-09-01 04:58:31,589 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:58:31,589 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 672 places, 721 transitions, 1519 flow [2023-09-01 04:58:31,590 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 672 places, 721 transitions, 1519 flow [2023-09-01 04:58:31,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 672 places, 721 transitions, 1519 flow [2023-09-01 04:58:31,789 INFO L130 PetriNetUnfolder]: 71/803 cut-off events. [2023-09-01 04:58:31,790 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-09-01 04:58:31,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 853 conditions, 803 events. 71/803 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3649 event pairs, 0 based on Foata normal form. 0/654 useless extension candidates. Maximal degree in co-relation 719. Up to 16 conditions per place. [2023-09-01 04:58:31,947 INFO L119 LiptonReduction]: Number of co-enabled transitions 416906 [2023-09-01 04:58:45,198 INFO L134 LiptonReduction]: Checked pairs total: 1191750 [2023-09-01 04:58:45,198 INFO L136 LiptonReduction]: Total number of compositions: 550 [2023-09-01 04:58:45,200 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 04:58:45,201 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@33e1af4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:58:45,201 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 04:58:45,230 INFO L130 PetriNetUnfolder]: 30/250 cut-off events. [2023-09-01 04:58:45,230 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-09-01 04:58:45,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:58:45,231 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:58:45,231 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 04:58:45,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:58:45,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1927094219, now seen corresponding path program 1 times [2023-09-01 04:58:45,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:58:45,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211756168] [2023-09-01 04:58:45,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:58:45,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:58:45,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:58:45,253 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 04:58:45,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:58:45,273 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 04:58:45,274 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 04:58:45,274 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 04:58:45,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 04:58:45,274 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 04:58:45,275 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 04:58:45,275 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 04:58:45,275 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-09-01 04:58:45,396 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 04:58:45,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 763 places, 819 transitions, 1734 flow [2023-09-01 04:58:45,656 INFO L130 PetriNetUnfolder]: 81/913 cut-off events. [2023-09-01 04:58:45,657 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-09-01 04:58:45,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 974 conditions, 913 events. 81/913 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4325 event pairs, 0 based on Foata normal form. 0/743 useless extension candidates. Maximal degree in co-relation 837. Up to 18 conditions per place. [2023-09-01 04:58:45,686 INFO L82 GeneralOperation]: Start removeDead. Operand has 763 places, 819 transitions, 1734 flow [2023-09-01 04:58:45,696 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 763 places, 819 transitions, 1734 flow [2023-09-01 04:58:45,696 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:58:45,696 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 763 places, 819 transitions, 1734 flow [2023-09-01 04:58:45,697 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 763 places, 819 transitions, 1734 flow [2023-09-01 04:58:45,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 763 places, 819 transitions, 1734 flow [2023-09-01 04:58:45,980 INFO L130 PetriNetUnfolder]: 81/913 cut-off events. [2023-09-01 04:58:45,981 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-09-01 04:58:46,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 974 conditions, 913 events. 81/913 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4325 event pairs, 0 based on Foata normal form. 0/743 useless extension candidates. Maximal degree in co-relation 837. Up to 18 conditions per place. [2023-09-01 04:58:46,067 INFO L119 LiptonReduction]: Number of co-enabled transitions 552512 [2023-09-01 04:59:01,110 INFO L134 LiptonReduction]: Checked pairs total: 1608532 [2023-09-01 04:59:01,110 INFO L136 LiptonReduction]: Total number of compositions: 624 [2023-09-01 04:59:01,112 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 04:59:01,112 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@33e1af4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:59:01,113 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 04:59:01,154 INFO L130 PetriNetUnfolder]: 37/305 cut-off events. [2023-09-01 04:59:01,154 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-09-01 04:59:01,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:59:01,154 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:59:01,155 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 04:59:01,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:59:01,155 INFO L85 PathProgramCache]: Analyzing trace with hash 84623084, now seen corresponding path program 1 times [2023-09-01 04:59:01,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:59:01,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593716284] [2023-09-01 04:59:01,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:59:01,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:59:01,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:59:01,183 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 04:59:01,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:59:01,204 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 04:59:01,205 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 04:59:01,205 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 04:59:01,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 04:59:01,205 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 04:59:01,206 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 04:59:01,206 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 04:59:01,206 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-09-01 04:59:01,308 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 04:59:01,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 854 places, 917 transitions, 1951 flow [2023-09-01 04:59:01,677 INFO L130 PetriNetUnfolder]: 91/1023 cut-off events. [2023-09-01 04:59:01,678 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-09-01 04:59:01,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1096 conditions, 1023 events. 91/1023 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 5059 event pairs, 0 based on Foata normal form. 0/832 useless extension candidates. Maximal degree in co-relation 956. Up to 20 conditions per place. [2023-09-01 04:59:01,725 INFO L82 GeneralOperation]: Start removeDead. Operand has 854 places, 917 transitions, 1951 flow [2023-09-01 04:59:01,735 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 854 places, 917 transitions, 1951 flow [2023-09-01 04:59:01,736 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:59:01,736 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 854 places, 917 transitions, 1951 flow [2023-09-01 04:59:01,737 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 854 places, 917 transitions, 1951 flow [2023-09-01 04:59:01,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 854 places, 917 transitions, 1951 flow [2023-09-01 04:59:02,089 INFO L130 PetriNetUnfolder]: 91/1023 cut-off events. [2023-09-01 04:59:02,090 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-09-01 04:59:02,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1096 conditions, 1023 events. 91/1023 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 5059 event pairs, 0 based on Foata normal form. 0/832 useless extension candidates. Maximal degree in co-relation 956. Up to 20 conditions per place. [2023-09-01 04:59:02,203 INFO L119 LiptonReduction]: Number of co-enabled transitions 707130 [2023-09-01 04:59:18,980 INFO L134 LiptonReduction]: Checked pairs total: 2282311 [2023-09-01 04:59:18,980 INFO L136 LiptonReduction]: Total number of compositions: 704 [2023-09-01 04:59:18,985 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 04:59:18,985 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@33e1af4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:59:18,986 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 04:59:19,042 INFO L130 PetriNetUnfolder]: 44/351 cut-off events. [2023-09-01 04:59:19,043 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-09-01 04:59:19,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:59:19,043 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:59:19,043 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 04:59:19,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:59:19,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1043776736, now seen corresponding path program 1 times [2023-09-01 04:59:19,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:59:19,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602582875] [2023-09-01 04:59:19,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:59:19,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:59:19,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:59:19,071 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 04:59:19,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:59:19,097 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 04:59:19,097 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 04:59:19,098 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 04:59:19,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 04:59:19,098 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 04:59:19,098 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 04:59:19,099 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 04:59:19,099 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-09-01 04:59:19,234 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 04:59:19,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 945 places, 1015 transitions, 2170 flow [2023-09-01 04:59:19,603 INFO L130 PetriNetUnfolder]: 101/1133 cut-off events. [2023-09-01 04:59:19,603 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-09-01 04:59:19,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1219 conditions, 1133 events. 101/1133 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 5728 event pairs, 0 based on Foata normal form. 0/921 useless extension candidates. Maximal degree in co-relation 1076. Up to 22 conditions per place. [2023-09-01 04:59:19,647 INFO L82 GeneralOperation]: Start removeDead. Operand has 945 places, 1015 transitions, 2170 flow [2023-09-01 04:59:19,657 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 945 places, 1015 transitions, 2170 flow [2023-09-01 04:59:19,657 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:59:19,657 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 945 places, 1015 transitions, 2170 flow [2023-09-01 04:59:19,657 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 945 places, 1015 transitions, 2170 flow [2023-09-01 04:59:19,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 945 places, 1015 transitions, 2170 flow [2023-09-01 04:59:20,079 INFO L130 PetriNetUnfolder]: 101/1133 cut-off events. [2023-09-01 04:59:20,080 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-09-01 04:59:20,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1219 conditions, 1133 events. 101/1133 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 5728 event pairs, 0 based on Foata normal form. 0/921 useless extension candidates. Maximal degree in co-relation 1076. Up to 22 conditions per place. [2023-09-01 04:59:20,230 INFO L119 LiptonReduction]: Number of co-enabled transitions 880760 [2023-09-01 04:59:38,722 INFO L134 LiptonReduction]: Checked pairs total: 2566361 [2023-09-01 04:59:38,723 INFO L136 LiptonReduction]: Total number of compositions: 776 [2023-09-01 04:59:38,725 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 04:59:38,725 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@33e1af4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:59:38,726 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 04:59:38,787 INFO L130 PetriNetUnfolder]: 51/402 cut-off events. [2023-09-01 04:59:38,788 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-09-01 04:59:38,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:59:38,788 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:59:38,788 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 04:59:38,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:59:38,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1380839406, now seen corresponding path program 1 times [2023-09-01 04:59:38,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:59:38,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153766181] [2023-09-01 04:59:38,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:59:38,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:59:38,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:59:38,820 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 04:59:38,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:59:38,859 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 04:59:38,859 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 04:59:38,859 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 04:59:38,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 04:59:38,860 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 04:59:38,860 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 04:59:38,860 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 04:59:38,860 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-09-01 04:59:38,998 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 04:59:39,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1036 places, 1113 transitions, 2391 flow [2023-09-01 04:59:39,488 INFO L130 PetriNetUnfolder]: 111/1243 cut-off events. [2023-09-01 04:59:39,488 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-09-01 04:59:39,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1343 conditions, 1243 events. 111/1243 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 6400 event pairs, 0 based on Foata normal form. 0/1010 useless extension candidates. Maximal degree in co-relation 1199. Up to 24 conditions per place. [2023-09-01 04:59:39,534 INFO L82 GeneralOperation]: Start removeDead. Operand has 1036 places, 1113 transitions, 2391 flow [2023-09-01 04:59:39,547 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1036 places, 1113 transitions, 2391 flow [2023-09-01 04:59:39,547 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:59:39,547 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1036 places, 1113 transitions, 2391 flow [2023-09-01 04:59:39,547 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1036 places, 1113 transitions, 2391 flow [2023-09-01 04:59:39,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1036 places, 1113 transitions, 2391 flow [2023-09-01 04:59:39,939 INFO L130 PetriNetUnfolder]: 111/1243 cut-off events. [2023-09-01 04:59:39,939 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-09-01 04:59:40,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1343 conditions, 1243 events. 111/1243 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 6400 event pairs, 0 based on Foata normal form. 0/1010 useless extension candidates. Maximal degree in co-relation 1199. Up to 24 conditions per place. [2023-09-01 04:59:40,270 INFO L119 LiptonReduction]: Number of co-enabled transitions 1073402 [2023-09-01 05:00:01,886 INFO L134 LiptonReduction]: Checked pairs total: 3507382 [2023-09-01 05:00:01,886 INFO L136 LiptonReduction]: Total number of compositions: 849 [2023-09-01 05:00:01,888 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:00:01,888 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@33e1af4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:00:01,888 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:00:01,959 INFO L130 PetriNetUnfolder]: 58/455 cut-off events. [2023-09-01 05:00:01,959 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-09-01 05:00:01,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:00:01,959 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:00:01,959 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:00:01,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:00:01,960 INFO L85 PathProgramCache]: Analyzing trace with hash -361810310, now seen corresponding path program 1 times [2023-09-01 05:00:01,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:00:01,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102779680] [2023-09-01 05:00:01,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:00:01,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:00:01,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:00:01,990 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:00:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:00:02,018 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:00:02,019 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:00:02,019 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:00:02,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 05:00:02,019 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:00:02,020 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:00:02,020 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:00:02,020 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-09-01 05:00:02,151 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:00:02,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1127 places, 1211 transitions, 2614 flow [2023-09-01 05:00:02,758 INFO L130 PetriNetUnfolder]: 121/1353 cut-off events. [2023-09-01 05:00:02,759 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-09-01 05:00:02,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1468 conditions, 1353 events. 121/1353 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 7070 event pairs, 0 based on Foata normal form. 0/1099 useless extension candidates. Maximal degree in co-relation 1323. Up to 26 conditions per place. [2023-09-01 05:00:02,832 INFO L82 GeneralOperation]: Start removeDead. Operand has 1127 places, 1211 transitions, 2614 flow [2023-09-01 05:00:02,845 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1127 places, 1211 transitions, 2614 flow [2023-09-01 05:00:02,846 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:00:02,846 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1127 places, 1211 transitions, 2614 flow [2023-09-01 05:00:02,846 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1127 places, 1211 transitions, 2614 flow [2023-09-01 05:00:02,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1127 places, 1211 transitions, 2614 flow [2023-09-01 05:00:03,305 INFO L130 PetriNetUnfolder]: 121/1353 cut-off events. [2023-09-01 05:00:03,306 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-09-01 05:00:03,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1468 conditions, 1353 events. 121/1353 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 7070 event pairs, 0 based on Foata normal form. 0/1099 useless extension candidates. Maximal degree in co-relation 1323. Up to 26 conditions per place. [2023-09-01 05:00:03,577 INFO L119 LiptonReduction]: Number of co-enabled transitions 1285056 [2023-09-01 05:00:26,837 INFO L134 LiptonReduction]: Checked pairs total: 4170663 [2023-09-01 05:00:26,838 INFO L136 LiptonReduction]: Total number of compositions: 919 [2023-09-01 05:00:26,839 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:00:26,840 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@33e1af4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:00:26,840 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:00:26,909 INFO L130 PetriNetUnfolder]: 64/499 cut-off events. [2023-09-01 05:00:26,909 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-09-01 05:00:26,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:00:26,909 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:00:26,910 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:00:26,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:00:26,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1008849469, now seen corresponding path program 1 times [2023-09-01 05:00:26,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:00:26,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932407086] [2023-09-01 05:00:26,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:00:26,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:00:26,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:00:26,939 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:00:26,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:00:26,971 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:00:26,971 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:00:26,971 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:00:26,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 05:00:26,972 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:00:26,972 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:00:26,972 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:00:26,972 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-09-01 05:00:27,119 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:00:27,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1218 places, 1309 transitions, 2839 flow [2023-09-01 05:00:27,739 INFO L130 PetriNetUnfolder]: 131/1463 cut-off events. [2023-09-01 05:00:27,739 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-09-01 05:00:27,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1594 conditions, 1463 events. 131/1463 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 7779 event pairs, 0 based on Foata normal form. 0/1188 useless extension candidates. Maximal degree in co-relation 1448. Up to 28 conditions per place. [2023-09-01 05:00:27,808 INFO L82 GeneralOperation]: Start removeDead. Operand has 1218 places, 1309 transitions, 2839 flow [2023-09-01 05:00:27,822 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1218 places, 1309 transitions, 2839 flow [2023-09-01 05:00:27,822 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:00:27,823 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1218 places, 1309 transitions, 2839 flow [2023-09-01 05:00:27,823 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1218 places, 1309 transitions, 2839 flow [2023-09-01 05:00:27,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1218 places, 1309 transitions, 2839 flow [2023-09-01 05:00:28,329 INFO L130 PetriNetUnfolder]: 131/1463 cut-off events. [2023-09-01 05:00:28,329 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-09-01 05:00:28,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1594 conditions, 1463 events. 131/1463 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 7779 event pairs, 0 based on Foata normal form. 0/1188 useless extension candidates. Maximal degree in co-relation 1448. Up to 28 conditions per place. [2023-09-01 05:00:28,785 INFO L119 LiptonReduction]: Number of co-enabled transitions 1515722 [2023-09-01 05:00:52,285 INFO L134 LiptonReduction]: Checked pairs total: 4415961 [2023-09-01 05:00:52,286 INFO L136 LiptonReduction]: Total number of compositions: 980 [2023-09-01 05:00:52,287 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:00:52,288 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@33e1af4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:00:52,288 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:00:52,382 INFO L130 PetriNetUnfolder]: 72/553 cut-off events. [2023-09-01 05:00:52,382 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-09-01 05:00:52,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:00:52,382 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:00:52,382 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:00:52,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:00:52,382 INFO L85 PathProgramCache]: Analyzing trace with hash -357850694, now seen corresponding path program 1 times [2023-09-01 05:00:52,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:00:52,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682168737] [2023-09-01 05:00:52,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:00:52,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:00:52,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:00:52,412 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:00:52,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:00:52,441 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:00:52,441 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:00:52,442 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:00:52,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 05:00:52,442 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:00:52,442 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:00:52,443 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:00:52,443 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-09-01 05:00:52,593 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:00:52,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1309 places, 1407 transitions, 3066 flow [2023-09-01 05:00:53,249 INFO L130 PetriNetUnfolder]: 141/1573 cut-off events. [2023-09-01 05:00:53,249 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-09-01 05:00:53,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1721 conditions, 1573 events. 141/1573 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 8445 event pairs, 0 based on Foata normal form. 0/1277 useless extension candidates. Maximal degree in co-relation 1574. Up to 30 conditions per place. [2023-09-01 05:00:53,321 INFO L82 GeneralOperation]: Start removeDead. Operand has 1309 places, 1407 transitions, 3066 flow [2023-09-01 05:00:53,336 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1309 places, 1407 transitions, 3066 flow [2023-09-01 05:00:53,336 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:00:53,336 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1309 places, 1407 transitions, 3066 flow [2023-09-01 05:00:53,336 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1309 places, 1407 transitions, 3066 flow [2023-09-01 05:00:53,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1309 places, 1407 transitions, 3066 flow [2023-09-01 05:00:53,916 INFO L130 PetriNetUnfolder]: 141/1573 cut-off events. [2023-09-01 05:00:53,916 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-09-01 05:00:54,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1721 conditions, 1573 events. 141/1573 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 8445 event pairs, 0 based on Foata normal form. 0/1277 useless extension candidates. Maximal degree in co-relation 1574. Up to 30 conditions per place. [2023-09-01 05:00:54,292 INFO L119 LiptonReduction]: Number of co-enabled transitions 1765400 [2023-09-01 05:01:22,231 INFO L134 LiptonReduction]: Checked pairs total: 5183324 [2023-09-01 05:01:22,231 INFO L136 LiptonReduction]: Total number of compositions: 1068 [2023-09-01 05:01:22,233 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:01:22,233 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@33e1af4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:01:22,233 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:01:22,359 INFO L130 PetriNetUnfolder]: 78/608 cut-off events. [2023-09-01 05:01:22,359 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-09-01 05:01:22,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:01:22,360 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:01:22,360 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:01:22,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:01:22,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1878621585, now seen corresponding path program 1 times [2023-09-01 05:01:22,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:01:22,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540899771] [2023-09-01 05:01:22,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:01:22,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:01:22,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:01:22,392 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:01:22,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:01:22,424 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:01:22,425 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:01:22,425 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:01:22,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-09-01 05:01:22,425 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:01:22,426 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:01:22,426 WARN L233 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:01:22,426 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2023-09-01 05:01:22,591 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:01:22,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1400 places, 1505 transitions, 3295 flow [2023-09-01 05:01:23,282 INFO L130 PetriNetUnfolder]: 151/1683 cut-off events. [2023-09-01 05:01:23,282 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-09-01 05:01:23,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1849 conditions, 1683 events. 151/1683 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 9142 event pairs, 0 based on Foata normal form. 0/1366 useless extension candidates. Maximal degree in co-relation 1701. Up to 32 conditions per place. [2023-09-01 05:01:23,388 INFO L82 GeneralOperation]: Start removeDead. Operand has 1400 places, 1505 transitions, 3295 flow [2023-09-01 05:01:23,409 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1400 places, 1505 transitions, 3295 flow [2023-09-01 05:01:23,410 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:01:23,410 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1400 places, 1505 transitions, 3295 flow [2023-09-01 05:01:23,410 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1400 places, 1505 transitions, 3295 flow [2023-09-01 05:01:23,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1400 places, 1505 transitions, 3295 flow [2023-09-01 05:01:24,114 INFO L130 PetriNetUnfolder]: 151/1683 cut-off events. [2023-09-01 05:01:24,114 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-09-01 05:01:24,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1849 conditions, 1683 events. 151/1683 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 9142 event pairs, 0 based on Foata normal form. 0/1366 useless extension candidates. Maximal degree in co-relation 1701. Up to 32 conditions per place. [2023-09-01 05:01:24,507 INFO L119 LiptonReduction]: Number of co-enabled transitions 2034090 [2023-09-01 05:01:54,188 INFO L134 LiptonReduction]: Checked pairs total: 6592358 [2023-09-01 05:01:54,188 INFO L136 LiptonReduction]: Total number of compositions: 1137 [2023-09-01 05:01:54,190 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:01:54,190 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@33e1af4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:01:54,190 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:01:54,307 INFO L130 PetriNetUnfolder]: 85/652 cut-off events. [2023-09-01 05:01:54,307 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-09-01 05:01:54,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:01:54,307 INFO L208 CegarLoopForPetriNet]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:01:54,308 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:01:54,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:01:54,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1862721328, now seen corresponding path program 1 times [2023-09-01 05:01:54,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:01:54,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952433482] [2023-09-01 05:01:54,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:01:54,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:01:54,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:01:54,355 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:01:54,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:01:54,398 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:01:54,398 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:01:54,400 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:01:54,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-09-01 05:01:54,400 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:01:54,400 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:01:54,401 WARN L233 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:01:54,401 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2023-09-01 05:01:54,563 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:01:54,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1491 places, 1603 transitions, 3526 flow [2023-09-01 05:01:55,585 INFO L130 PetriNetUnfolder]: 161/1793 cut-off events. [2023-09-01 05:01:55,585 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-09-01 05:01:55,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1978 conditions, 1793 events. 161/1793 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 9844 event pairs, 0 based on Foata normal form. 0/1455 useless extension candidates. Maximal degree in co-relation 1829. Up to 34 conditions per place. [2023-09-01 05:01:55,673 INFO L82 GeneralOperation]: Start removeDead. Operand has 1491 places, 1603 transitions, 3526 flow [2023-09-01 05:01:55,691 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1491 places, 1603 transitions, 3526 flow [2023-09-01 05:01:55,691 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:01:55,692 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1491 places, 1603 transitions, 3526 flow [2023-09-01 05:01:55,692 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1491 places, 1603 transitions, 3526 flow [2023-09-01 05:01:55,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1491 places, 1603 transitions, 3526 flow [2023-09-01 05:01:56,472 INFO L130 PetriNetUnfolder]: 161/1793 cut-off events. [2023-09-01 05:01:56,472 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-09-01 05:01:56,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1978 conditions, 1793 events. 161/1793 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 9844 event pairs, 0 based on Foata normal form. 0/1455 useless extension candidates. Maximal degree in co-relation 1829. Up to 34 conditions per place. [2023-09-01 05:01:56,935 INFO L119 LiptonReduction]: Number of co-enabled transitions 2321792 [2023-09-01 05:02:28,994 INFO L134 LiptonReduction]: Checked pairs total: 7579547 [2023-09-01 05:02:28,995 INFO L136 LiptonReduction]: Total number of compositions: 1222 [2023-09-01 05:02:28,997 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:02:28,997 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@33e1af4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:02:28,997 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:02:29,180 INFO L130 PetriNetUnfolder]: 92/705 cut-off events. [2023-09-01 05:02:29,180 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-09-01 05:02:29,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:02:29,180 INFO L208 CegarLoopForPetriNet]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:02:29,181 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:02:29,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:02:29,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1636104487, now seen corresponding path program 1 times [2023-09-01 05:02:29,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:02:29,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614419331] [2023-09-01 05:02:29,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:02:29,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:02:29,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:02:29,215 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:02:29,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:02:29,270 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:02:29,270 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:02:29,271 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:02:29,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-09-01 05:02:29,271 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:02:29,271 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:02:29,272 WARN L233 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:02:29,272 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2023-09-01 05:02:29,440 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:02:29,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1582 places, 1701 transitions, 3759 flow [2023-09-01 05:02:30,479 INFO L130 PetriNetUnfolder]: 171/1903 cut-off events. [2023-09-01 05:02:30,479 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-09-01 05:02:30,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2108 conditions, 1903 events. 171/1903 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 10500 event pairs, 0 based on Foata normal form. 0/1544 useless extension candidates. Maximal degree in co-relation 1958. Up to 36 conditions per place. [2023-09-01 05:02:30,639 INFO L82 GeneralOperation]: Start removeDead. Operand has 1582 places, 1701 transitions, 3759 flow [2023-09-01 05:02:30,675 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1582 places, 1701 transitions, 3759 flow [2023-09-01 05:02:30,675 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:02:30,675 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1582 places, 1701 transitions, 3759 flow [2023-09-01 05:02:30,675 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1582 places, 1701 transitions, 3759 flow [2023-09-01 05:02:30,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1582 places, 1701 transitions, 3759 flow [2023-09-01 05:02:31,613 INFO L130 PetriNetUnfolder]: 171/1903 cut-off events. [2023-09-01 05:02:31,613 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-09-01 05:02:31,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2108 conditions, 1903 events. 171/1903 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 10500 event pairs, 0 based on Foata normal form. 0/1544 useless extension candidates. Maximal degree in co-relation 1958. Up to 36 conditions per place. [2023-09-01 05:02:32,257 INFO L119 LiptonReduction]: Number of co-enabled transitions 2628506 [2023-09-01 05:03:07,717 INFO L134 LiptonReduction]: Checked pairs total: 8522192 [2023-09-01 05:03:07,717 INFO L136 LiptonReduction]: Total number of compositions: 1282 [2023-09-01 05:03:07,719 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:03:07,719 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@33e1af4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:03:07,719 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:03:07,865 INFO L130 PetriNetUnfolder]: 100/762 cut-off events. [2023-09-01 05:03:07,865 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-09-01 05:03:07,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:03:07,865 INFO L208 CegarLoopForPetriNet]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:03:07,865 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:03:07,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:03:07,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1746100533, now seen corresponding path program 1 times [2023-09-01 05:03:07,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:03:07,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044941889] [2023-09-01 05:03:07,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:03:07,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:03:07,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:03:07,925 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:03:07,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:03:07,965 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:03:07,971 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:03:07,971 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:03:07,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-09-01 05:03:07,971 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:03:07,972 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:03:07,972 WARN L233 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:03:07,972 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2023-09-01 05:03:08,179 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:03:08,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1673 places, 1799 transitions, 3994 flow [2023-09-01 05:03:09,422 INFO L130 PetriNetUnfolder]: 181/2013 cut-off events. [2023-09-01 05:03:09,422 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-09-01 05:03:09,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2239 conditions, 2013 events. 181/2013 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 11209 event pairs, 0 based on Foata normal form. 0/1633 useless extension candidates. Maximal degree in co-relation 2088. Up to 38 conditions per place. [2023-09-01 05:03:09,598 INFO L82 GeneralOperation]: Start removeDead. Operand has 1673 places, 1799 transitions, 3994 flow [2023-09-01 05:03:09,636 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1673 places, 1799 transitions, 3994 flow [2023-09-01 05:03:09,636 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:03:09,637 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1673 places, 1799 transitions, 3994 flow [2023-09-01 05:03:09,637 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1673 places, 1799 transitions, 3994 flow [2023-09-01 05:03:09,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1673 places, 1799 transitions, 3994 flow [2023-09-01 05:03:10,790 INFO L130 PetriNetUnfolder]: 181/2013 cut-off events. [2023-09-01 05:03:10,790 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-09-01 05:03:10,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2239 conditions, 2013 events. 181/2013 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 11209 event pairs, 0 based on Foata normal form. 0/1633 useless extension candidates. Maximal degree in co-relation 2088. Up to 38 conditions per place. [2023-09-01 05:03:11,412 INFO L119 LiptonReduction]: Number of co-enabled transitions 2954232 [2023-09-01 05:03:48,416 INFO L134 LiptonReduction]: Checked pairs total: 8571900 [2023-09-01 05:03:48,416 INFO L136 LiptonReduction]: Total number of compositions: 1351 [2023-09-01 05:03:48,418 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:03:48,418 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@33e1af4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:03:48,418 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:03:48,658 INFO L130 PetriNetUnfolder]: 107/809 cut-off events. [2023-09-01 05:03:48,659 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-09-01 05:03:48,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:03:48,659 INFO L208 CegarLoopForPetriNet]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:03:48,659 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:03:48,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:03:48,660 INFO L85 PathProgramCache]: Analyzing trace with hash 596187427, now seen corresponding path program 1 times [2023-09-01 05:03:48,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:03:48,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922119722] [2023-09-01 05:03:48,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:03:48,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:03:48,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:03:48,724 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:03:48,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:03:48,777 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:03:48,779 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:03:48,780 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:03:48,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-09-01 05:03:48,781 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:03:48,781 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:03:48,781 WARN L233 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:03:48,781 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2023-09-01 05:03:48,993 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:03:49,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1764 places, 1897 transitions, 4231 flow [2023-09-01 05:03:50,590 INFO L130 PetriNetUnfolder]: 191/2123 cut-off events. [2023-09-01 05:03:50,590 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-09-01 05:03:50,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2371 conditions, 2123 events. 191/2123 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 11858 event pairs, 0 based on Foata normal form. 0/1722 useless extension candidates. Maximal degree in co-relation 2219. Up to 40 conditions per place. [2023-09-01 05:03:50,729 INFO L82 GeneralOperation]: Start removeDead. Operand has 1764 places, 1897 transitions, 4231 flow [2023-09-01 05:03:50,756 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1764 places, 1897 transitions, 4231 flow [2023-09-01 05:03:50,756 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:03:50,757 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1764 places, 1897 transitions, 4231 flow [2023-09-01 05:03:50,757 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1764 places, 1897 transitions, 4231 flow [2023-09-01 05:03:50,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1764 places, 1897 transitions, 4231 flow [2023-09-01 05:03:52,055 INFO L130 PetriNetUnfolder]: 191/2123 cut-off events. [2023-09-01 05:03:52,055 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-09-01 05:03:52,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2371 conditions, 2123 events. 191/2123 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 11858 event pairs, 0 based on Foata normal form. 0/1722 useless extension candidates. Maximal degree in co-relation 2219. Up to 40 conditions per place. [2023-09-01 05:03:52,871 INFO L119 LiptonReduction]: Number of co-enabled transitions 3298970 [2023-09-01 05:04:31,891 INFO L134 LiptonReduction]: Checked pairs total: 9540040 [2023-09-01 05:04:31,891 INFO L136 LiptonReduction]: Total number of compositions: 1435 [2023-09-01 05:04:31,893 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:04:31,893 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@33e1af4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:04:31,893 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:04:32,075 INFO L130 PetriNetUnfolder]: 114/856 cut-off events. [2023-09-01 05:04:32,076 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-09-01 05:04:32,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:04:32,076 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:04:32,076 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:04:32,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:04:32,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1028835156, now seen corresponding path program 1 times [2023-09-01 05:04:32,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:04:32,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490449658] [2023-09-01 05:04:32,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:04:32,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:04:32,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:04:32,120 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:04:32,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:04:32,166 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:04:32,166 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:04:32,166 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:04:32,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-09-01 05:04:32,167 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:04:32,167 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:04:32,167 WARN L233 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:04:32,167 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2023-09-01 05:04:32,385 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:04:32,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1855 places, 1995 transitions, 4470 flow [2023-09-01 05:04:33,935 INFO L130 PetriNetUnfolder]: 201/2233 cut-off events. [2023-09-01 05:04:33,935 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-09-01 05:04:34,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2504 conditions, 2233 events. 201/2233 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 12565 event pairs, 0 based on Foata normal form. 0/1811 useless extension candidates. Maximal degree in co-relation 2351. Up to 42 conditions per place. [2023-09-01 05:04:34,097 INFO L82 GeneralOperation]: Start removeDead. Operand has 1855 places, 1995 transitions, 4470 flow [2023-09-01 05:04:34,129 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1855 places, 1995 transitions, 4470 flow [2023-09-01 05:04:34,129 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:04:34,129 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1855 places, 1995 transitions, 4470 flow [2023-09-01 05:04:34,130 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1855 places, 1995 transitions, 4470 flow [2023-09-01 05:04:34,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1855 places, 1995 transitions, 4470 flow [2023-09-01 05:04:35,688 INFO L130 PetriNetUnfolder]: 201/2233 cut-off events. [2023-09-01 05:04:35,688 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-09-01 05:04:35,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2504 conditions, 2233 events. 201/2233 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 12565 event pairs, 0 based on Foata normal form. 0/1811 useless extension candidates. Maximal degree in co-relation 2351. Up to 42 conditions per place. [2023-09-01 05:04:36,346 INFO L119 LiptonReduction]: Number of co-enabled transitions 3662720 [2023-09-01 05:05:18,381 INFO L134 LiptonReduction]: Checked pairs total: 11839149 [2023-09-01 05:05:18,381 INFO L136 LiptonReduction]: Total number of compositions: 1520 [2023-09-01 05:05:18,382 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:05:18,383 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@33e1af4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:05:18,383 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:05:18,586 INFO L130 PetriNetUnfolder]: 120/906 cut-off events. [2023-09-01 05:05:18,586 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-09-01 05:05:18,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:05:18,586 INFO L208 CegarLoopForPetriNet]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:05:18,586 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:05:18,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:05:18,587 INFO L85 PathProgramCache]: Analyzing trace with hash -2093940908, now seen corresponding path program 1 times [2023-09-01 05:05:18,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:05:18,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878894726] [2023-09-01 05:05:18,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:05:18,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:05:18,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:05:18,630 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:05:18,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:05:18,682 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:05:18,683 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:05:18,683 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:05:18,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-09-01 05:05:18,683 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:05:18,684 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:05:18,685 WARN L233 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:05:18,685 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2023-09-01 05:05:18,902 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:05:18,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1946 places, 2093 transitions, 4711 flow [2023-09-01 05:05:20,590 INFO L130 PetriNetUnfolder]: 211/2343 cut-off events. [2023-09-01 05:05:20,590 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-09-01 05:05:20,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2638 conditions, 2343 events. 211/2343 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 13237 event pairs, 0 based on Foata normal form. 0/1900 useless extension candidates. Maximal degree in co-relation 2484. Up to 44 conditions per place. [2023-09-01 05:05:20,763 INFO L82 GeneralOperation]: Start removeDead. Operand has 1946 places, 2093 transitions, 4711 flow [2023-09-01 05:05:20,798 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1946 places, 2093 transitions, 4711 flow [2023-09-01 05:05:20,799 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:05:20,799 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1946 places, 2093 transitions, 4711 flow [2023-09-01 05:05:20,799 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1946 places, 2093 transitions, 4711 flow [2023-09-01 05:05:20,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1946 places, 2093 transitions, 4711 flow [2023-09-01 05:05:22,473 INFO L130 PetriNetUnfolder]: 211/2343 cut-off events. [2023-09-01 05:05:22,473 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-09-01 05:05:22,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2638 conditions, 2343 events. 211/2343 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 13237 event pairs, 0 based on Foata normal form. 0/1900 useless extension candidates. Maximal degree in co-relation 2484. Up to 44 conditions per place. [2023-09-01 05:05:23,414 INFO L119 LiptonReduction]: Number of co-enabled transitions 4045482 [2023-09-01 05:06:06,830 INFO L134 LiptonReduction]: Checked pairs total: 13079904 [2023-09-01 05:06:06,830 INFO L136 LiptonReduction]: Total number of compositions: 1577 [2023-09-01 05:06:06,832 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:06:06,832 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@33e1af4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:06:06,832 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:06:07,090 INFO L130 PetriNetUnfolder]: 128/961 cut-off events. [2023-09-01 05:06:07,090 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-09-01 05:06:07,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:06:07,090 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:06:07,090 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:06:07,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:06:07,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1413707704, now seen corresponding path program 1 times [2023-09-01 05:06:07,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:06:07,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650893657] [2023-09-01 05:06:07,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:06:07,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:06:07,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:06:07,137 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:06:07,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:06:07,261 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:06:07,262 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:06:07,262 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:06:07,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-09-01 05:06:07,262 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:06:07,263 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:06:07,263 WARN L233 ceAbstractionStarter]: 21 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:06:07,263 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 22 thread instances. [2023-09-01 05:06:07,516 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:06:07,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2037 places, 2191 transitions, 4954 flow [2023-09-01 05:06:09,471 INFO L130 PetriNetUnfolder]: 221/2453 cut-off events. [2023-09-01 05:06:09,471 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-09-01 05:06:09,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2773 conditions, 2453 events. 221/2453 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 13918 event pairs, 0 based on Foata normal form. 0/1989 useless extension candidates. Maximal degree in co-relation 2618. Up to 46 conditions per place. [2023-09-01 05:06:09,666 INFO L82 GeneralOperation]: Start removeDead. Operand has 2037 places, 2191 transitions, 4954 flow [2023-09-01 05:06:09,702 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2037 places, 2191 transitions, 4954 flow [2023-09-01 05:06:09,702 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:06:09,702 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2037 places, 2191 transitions, 4954 flow [2023-09-01 05:06:09,702 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2037 places, 2191 transitions, 4954 flow [2023-09-01 05:06:09,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2037 places, 2191 transitions, 4954 flow [2023-09-01 05:06:11,962 INFO L130 PetriNetUnfolder]: 221/2453 cut-off events. [2023-09-01 05:06:11,962 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-09-01 05:06:12,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2773 conditions, 2453 events. 221/2453 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 13918 event pairs, 0 based on Foata normal form. 0/1989 useless extension candidates. Maximal degree in co-relation 2618. Up to 46 conditions per place. [2023-09-01 05:06:13,160 INFO L119 LiptonReduction]: Number of co-enabled transitions 4447256 [2023-09-01 05:06:59,263 INFO L134 LiptonReduction]: Checked pairs total: 14441192 [2023-09-01 05:06:59,263 INFO L136 LiptonReduction]: Total number of compositions: 1659 [2023-09-01 05:06:59,265 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:06:59,265 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@33e1af4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:06:59,265 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:06:59,587 INFO L130 PetriNetUnfolder]: 135/1007 cut-off events. [2023-09-01 05:06:59,587 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-09-01 05:06:59,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:06:59,587 INFO L208 CegarLoopForPetriNet]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:06:59,588 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:06:59,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:06:59,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1769364969, now seen corresponding path program 1 times [2023-09-01 05:06:59,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:06:59,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095174951] [2023-09-01 05:06:59,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:06:59,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:06:59,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:06:59,638 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:06:59,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:06:59,695 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:06:59,696 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:06:59,696 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:06:59,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-09-01 05:06:59,696 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:06:59,697 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:06:59,697 WARN L233 ceAbstractionStarter]: 22 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:06:59,697 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 23 thread instances. [2023-09-01 05:06:59,918 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:06:59,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2128 places, 2289 transitions, 5199 flow [2023-09-01 05:07:01,897 INFO L130 PetriNetUnfolder]: 231/2563 cut-off events. [2023-09-01 05:07:01,897 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-09-01 05:07:02,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2909 conditions, 2563 events. 231/2563 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 14576 event pairs, 0 based on Foata normal form. 0/2078 useless extension candidates. Maximal degree in co-relation 2753. Up to 48 conditions per place. [2023-09-01 05:07:02,114 INFO L82 GeneralOperation]: Start removeDead. Operand has 2128 places, 2289 transitions, 5199 flow [2023-09-01 05:07:02,153 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2128 places, 2289 transitions, 5199 flow [2023-09-01 05:07:02,153 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:07:02,153 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2128 places, 2289 transitions, 5199 flow [2023-09-01 05:07:02,153 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2128 places, 2289 transitions, 5199 flow [2023-09-01 05:07:02,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2128 places, 2289 transitions, 5199 flow [2023-09-01 05:07:04,173 INFO L130 PetriNetUnfolder]: 231/2563 cut-off events. [2023-09-01 05:07:04,173 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-09-01 05:07:04,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2909 conditions, 2563 events. 231/2563 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 14576 event pairs, 0 based on Foata normal form. 0/2078 useless extension candidates. Maximal degree in co-relation 2753. Up to 48 conditions per place. [2023-09-01 05:07:05,270 INFO L119 LiptonReduction]: Number of co-enabled transitions 4868042 [2023-09-01 05:07:53,574 INFO L134 LiptonReduction]: Checked pairs total: 15654079 [2023-09-01 05:07:53,574 INFO L136 LiptonReduction]: Total number of compositions: 1731 [2023-09-01 05:07:53,575 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:07:53,576 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@33e1af4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:07:53,576 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:07:53,892 INFO L130 PetriNetUnfolder]: 141/1057 cut-off events. [2023-09-01 05:07:53,892 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-09-01 05:07:53,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:07:53,892 INFO L208 CegarLoopForPetriNet]: trace histogram [24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:07:53,892 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:07:53,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:07:53,892 INFO L85 PathProgramCache]: Analyzing trace with hash -186076379, now seen corresponding path program 1 times [2023-09-01 05:07:53,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:07:53,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617109750] [2023-09-01 05:07:53,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:07:53,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:07:53,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:07:53,960 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:07:53,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:07:54,016 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:07:54,016 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:07:54,016 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:07:54,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-09-01 05:07:54,017 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:07:54,017 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:07:54,017 WARN L233 ceAbstractionStarter]: 23 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:07:54,017 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 24 thread instances. [2023-09-01 05:07:54,351 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:07:54,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2219 places, 2387 transitions, 5446 flow [2023-09-01 05:07:56,721 INFO L130 PetriNetUnfolder]: 241/2673 cut-off events. [2023-09-01 05:07:56,721 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-09-01 05:07:56,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3046 conditions, 2673 events. 241/2673 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 15285 event pairs, 0 based on Foata normal form. 0/2167 useless extension candidates. Maximal degree in co-relation 2889. Up to 50 conditions per place. [2023-09-01 05:07:56,941 INFO L82 GeneralOperation]: Start removeDead. Operand has 2219 places, 2387 transitions, 5446 flow [2023-09-01 05:07:56,980 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2219 places, 2387 transitions, 5446 flow [2023-09-01 05:07:56,981 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:07:56,981 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2219 places, 2387 transitions, 5446 flow [2023-09-01 05:07:56,981 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2219 places, 2387 transitions, 5446 flow [2023-09-01 05:07:56,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2219 places, 2387 transitions, 5446 flow [2023-09-01 05:07:59,166 INFO L130 PetriNetUnfolder]: 241/2673 cut-off events. [2023-09-01 05:07:59,167 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-09-01 05:07:59,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3046 conditions, 2673 events. 241/2673 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 15285 event pairs, 0 based on Foata normal form. 0/2167 useless extension candidates. Maximal degree in co-relation 2889. Up to 50 conditions per place. [2023-09-01 05:08:00,333 INFO L119 LiptonReduction]: Number of co-enabled transitions 5307840 [2023-09-01 05:08:49,899 INFO L134 LiptonReduction]: Checked pairs total: 15443251 [2023-09-01 05:08:49,899 INFO L136 LiptonReduction]: Total number of compositions: 1811 [2023-09-01 05:08:49,901 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:08:49,901 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@33e1af4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:08:49,901 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:08:50,416 INFO L130 PetriNetUnfolder]: 149/1104 cut-off events. [2023-09-01 05:08:50,416 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-09-01 05:08:50,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:08:50,416 INFO L208 CegarLoopForPetriNet]: trace histogram [25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:08:50,416 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:08:50,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:08:50,416 INFO L85 PathProgramCache]: Analyzing trace with hash 2030743746, now seen corresponding path program 1 times [2023-09-01 05:08:50,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:08:50,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723630158] [2023-09-01 05:08:50,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:08:50,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:08:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:08:50,476 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:08:50,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:08:50,528 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:08:50,528 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:08:50,529 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:08:50,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-09-01 05:08:50,529 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:08:50,529 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:08:50,529 WARN L233 ceAbstractionStarter]: 24 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:08:50,529 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 25 thread instances. [2023-09-01 05:08:50,798 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:08:50,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2310 places, 2485 transitions, 5695 flow [2023-09-01 05:08:53,132 INFO L130 PetriNetUnfolder]: 251/2783 cut-off events. [2023-09-01 05:08:53,132 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-09-01 05:08:53,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3184 conditions, 2783 events. 251/2783 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 15953 event pairs, 0 based on Foata normal form. 0/2256 useless extension candidates. Maximal degree in co-relation 3026. Up to 52 conditions per place. [2023-09-01 05:08:53,401 INFO L82 GeneralOperation]: Start removeDead. Operand has 2310 places, 2485 transitions, 5695 flow [2023-09-01 05:08:53,468 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2310 places, 2485 transitions, 5695 flow [2023-09-01 05:08:53,468 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:08:53,468 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2310 places, 2485 transitions, 5695 flow [2023-09-01 05:08:53,468 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2310 places, 2485 transitions, 5695 flow [2023-09-01 05:08:53,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2310 places, 2485 transitions, 5695 flow [2023-09-01 05:08:56,027 INFO L130 PetriNetUnfolder]: 251/2783 cut-off events. [2023-09-01 05:08:56,028 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-09-01 05:08:56,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3184 conditions, 2783 events. 251/2783 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 15953 event pairs, 0 based on Foata normal form. 0/2256 useless extension candidates. Maximal degree in co-relation 3026. Up to 52 conditions per place. [2023-09-01 05:08:57,235 INFO L119 LiptonReduction]: Number of co-enabled transitions 5766650 Killed by 15