./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/36_stack_cas_p0_vs_concur.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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/36_stack_cas_p0_vs_concur.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e7fe0631e7f950e2868c8cb954edca4f6de3fdffbf6debba58771511fbac2e8b --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 09:27:24,681 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 09:27:24,683 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 09:27:24,710 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 09:27:24,711 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 09:27:24,713 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 09:27:24,715 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 09:27:24,718 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 09:27:24,720 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 09:27:24,724 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 09:27:24,725 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 09:27:24,728 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 09:27:24,728 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 09:27:24,730 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 09:27:24,732 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 09:27:24,735 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 09:27:24,736 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 09:27:24,738 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 09:27:24,741 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 09:27:24,743 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 09:27:24,746 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 09:27:24,747 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 09:27:24,748 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 09:27:24,749 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 09:27:24,754 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 09:27:24,757 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 09:27:24,758 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 09:27:24,759 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 09:27:24,759 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 09:27:24,760 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 09:27:24,760 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 09:27:24,761 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 09:27:24,762 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 09:27:24,762 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 09:27:24,763 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 09:27:24,763 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 09:27:24,764 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 09:27:24,764 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 09:27:24,764 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 09:27:24,765 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 09:27:24,766 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 09:27:24,767 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 09:27:24,806 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 09:27:24,806 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 09:27:24,806 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 09:27:24,806 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 09:27:24,807 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 09:27:24,807 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 09:27:24,808 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 09:27:24,808 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 09:27:24,808 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 09:27:24,808 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 09:27:24,808 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 09:27:24,808 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 09:27:24,808 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 09:27:24,808 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 09:27:24,809 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 09:27:24,809 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 09:27:24,809 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 09:27:24,809 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 09:27:24,809 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 09:27:24,809 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 09:27:24,809 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 09:27:24,809 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 09:27:24,809 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 09:27:24,810 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 09:27:24,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 09:27:24,810 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 09:27:24,810 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 09:27:24,810 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 09:27:24,810 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 09:27:24,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 09:27:24,810 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 09:27:24,810 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 09:27:24,810 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 09:27:24,811 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 09:27:24,811 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 09:27:24,811 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7fe0631e7f950e2868c8cb954edca4f6de3fdffbf6debba58771511fbac2e8b Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 09:27:25,092 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 09:27:25,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 09:27:25,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 09:27:25,114 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 09:27:25,114 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 09:27:25,116 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/36_stack_cas_p0_vs_concur.i [2023-09-01 09:27:26,255 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 09:27:26,500 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 09:27:26,506 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/36_stack_cas_p0_vs_concur.i [2023-09-01 09:27:26,517 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d04a1acfb/3aaf3fb15ba34c1c937d590d15777676/FLAGe59d24871 [2023-09-01 09:27:26,537 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d04a1acfb/3aaf3fb15ba34c1c937d590d15777676 [2023-09-01 09:27:26,539 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 09:27:26,541 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 09:27:26,543 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 09:27:26,543 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 09:27:26,546 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 09:27:26,547 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 09:27:26" (1/1) ... [2023-09-01 09:27:26,547 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@695baa91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:27:26, skipping insertion in model container [2023-09-01 09:27:26,548 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 09:27:26" (1/1) ... [2023-09-01 09:27:26,554 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 09:27:26,599 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 09:27:26,925 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/36_stack_cas_p0_vs_concur.i[30687,30700] [2023-09-01 09:27:26,931 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 09:27:26,943 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 09:27:26,987 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/36_stack_cas_p0_vs_concur.i[30687,30700] [2023-09-01 09:27:26,990 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 09:27:27,026 INFO L208 MainTranslator]: Completed translation [2023-09-01 09:27:27,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:27:27 WrapperNode [2023-09-01 09:27:27,026 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 09:27:27,028 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 09:27:27,028 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 09:27:27,028 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 09:27:27,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:27:27" (1/1) ... [2023-09-01 09:27:27,049 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:27:27" (1/1) ... [2023-09-01 09:27:27,080 INFO L138 Inliner]: procedures = 170, calls = 35, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 102 [2023-09-01 09:27:27,080 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 09:27:27,081 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 09:27:27,081 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 09:27:27,081 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 09:27:27,088 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:27:27" (1/1) ... [2023-09-01 09:27:27,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:27:27" (1/1) ... [2023-09-01 09:27:27,091 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:27:27" (1/1) ... [2023-09-01 09:27:27,091 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:27:27" (1/1) ... [2023-09-01 09:27:27,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:27:27" (1/1) ... [2023-09-01 09:27:27,108 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:27:27" (1/1) ... [2023-09-01 09:27:27,109 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:27:27" (1/1) ... [2023-09-01 09:27:27,110 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:27:27" (1/1) ... [2023-09-01 09:27:27,112 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 09:27:27,113 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 09:27:27,113 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 09:27:27,114 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 09:27:27,114 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:27:27" (1/1) ... [2023-09-01 09:27:27,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 09:27:27,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:27:27,152 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 09:27:27,160 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 09:27:27,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 09:27:27,191 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-09-01 09:27:27,191 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-09-01 09:27:27,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 09:27:27,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 09:27:27,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 09:27:27,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 09:27:27,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 09:27:27,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 09:27:27,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 09:27:27,193 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 09:27:27,293 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 09:27:27,295 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 09:27:27,513 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 09:27:27,587 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 09:27:27,588 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 09:27:27,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 09:27:27 BoogieIcfgContainer [2023-09-01 09:27:27,590 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 09:27:27,592 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 09:27:27,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 09:27:27,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 09:27:27,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 09:27:26" (1/3) ... [2023-09-01 09:27:27,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd6cc5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 09:27:27, skipping insertion in model container [2023-09-01 09:27:27,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:27:27" (2/3) ... [2023-09-01 09:27:27,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd6cc5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 09:27:27, skipping insertion in model container [2023-09-01 09:27:27,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 09:27:27" (3/3) ... [2023-09-01 09:27:27,597 INFO L112 eAbstractionObserver]: Analyzing ICFG 36_stack_cas_p0_vs_concur.i [2023-09-01 09:27:27,604 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 09:27:27,612 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 09:27:27,613 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 09:27:27,613 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 09:27:27,698 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:27:27,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 91 transitions, 187 flow [2023-09-01 09:27:27,831 INFO L130 PetriNetUnfolder]: 10/101 cut-off events. [2023-09-01 09:27:27,831 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 09:27:27,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 101 events. 10/101 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2023-09-01 09:27:27,837 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 91 transitions, 187 flow [2023-09-01 09:27:27,843 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 91 transitions, 187 flow [2023-09-01 09:27:27,847 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:27:27,858 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 91 transitions, 187 flow [2023-09-01 09:27:27,860 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 85 places, 91 transitions, 187 flow [2023-09-01 09:27:27,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 91 transitions, 187 flow [2023-09-01 09:27:27,878 INFO L130 PetriNetUnfolder]: 10/101 cut-off events. [2023-09-01 09:27:27,879 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 09:27:27,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 101 events. 10/101 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2023-09-01 09:27:27,881 INFO L119 LiptonReduction]: Number of co-enabled transitions 1612 [2023-09-01 09:27:29,457 INFO L134 LiptonReduction]: Checked pairs total: 2202 [2023-09-01 09:27:29,457 INFO L136 LiptonReduction]: Total number of compositions: 80 [2023-09-01 09:27:29,470 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:27:29,475 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:27:29,475 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:27:29,478 INFO L130 PetriNetUnfolder]: 0/11 cut-off events. [2023-09-01 09:27:29,479 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 09:27:29,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:27:29,479 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-09-01 09:27:29,480 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:27:29,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:27:29,484 INFO L85 PathProgramCache]: Analyzing trace with hash 439100169, now seen corresponding path program 1 times [2023-09-01 09:27:29,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:27:29,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630913898] [2023-09-01 09:27:29,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:27:29,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:27:29,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:27:29,607 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:27:29,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:27:29,666 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:27:29,667 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:27:29,669 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:27:29,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 09:27:29,671 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:27:29,676 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:27:29,676 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:27:29,676 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 09:27:29,720 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:27:29,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 154 transitions, 320 flow [2023-09-01 09:27:29,777 INFO L130 PetriNetUnfolder]: 19/176 cut-off events. [2023-09-01 09:27:29,778 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 09:27:29,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 176 events. 19/176 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 400 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 136. Up to 6 conditions per place. [2023-09-01 09:27:29,784 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 154 transitions, 320 flow [2023-09-01 09:27:29,786 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 154 transitions, 320 flow [2023-09-01 09:27:29,786 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:27:29,786 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 142 places, 154 transitions, 320 flow [2023-09-01 09:27:29,786 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 142 places, 154 transitions, 320 flow [2023-09-01 09:27:29,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 154 transitions, 320 flow [2023-09-01 09:27:29,824 INFO L130 PetriNetUnfolder]: 19/176 cut-off events. [2023-09-01 09:27:29,824 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 09:27:29,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 176 events. 19/176 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 400 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 136. Up to 6 conditions per place. [2023-09-01 09:27:29,832 INFO L119 LiptonReduction]: Number of co-enabled transitions 11036 [2023-09-01 09:27:31,626 INFO L134 LiptonReduction]: Checked pairs total: 20186 [2023-09-01 09:27:31,626 INFO L136 LiptonReduction]: Total number of compositions: 121 [2023-09-01 09:27:31,628 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:27:31,629 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:27:31,629 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:27:31,633 INFO L130 PetriNetUnfolder]: 2/33 cut-off events. [2023-09-01 09:27:31,633 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 09:27:31,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:27:31,633 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-09-01 09:27:31,634 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:27:31,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:27:31,634 INFO L85 PathProgramCache]: Analyzing trace with hash -630136530, now seen corresponding path program 1 times [2023-09-01 09:27:31,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:27:31,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292900020] [2023-09-01 09:27:31,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:27:31,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:27:31,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:27:31,657 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:27:31,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:27:31,685 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:27:31,685 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:27:31,686 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:27:31,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 09:27:31,686 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:27:31,687 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:27:31,687 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:27:31,687 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-09-01 09:27:31,723 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:27:31,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 217 transitions, 455 flow [2023-09-01 09:27:31,770 INFO L130 PetriNetUnfolder]: 28/251 cut-off events. [2023-09-01 09:27:31,770 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 09:27:31,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 251 events. 28/251 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 756 event pairs, 0 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 198. Up to 8 conditions per place. [2023-09-01 09:27:31,773 INFO L82 GeneralOperation]: Start removeDead. Operand has 199 places, 217 transitions, 455 flow [2023-09-01 09:27:31,775 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 199 places, 217 transitions, 455 flow [2023-09-01 09:27:31,776 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:27:31,776 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 199 places, 217 transitions, 455 flow [2023-09-01 09:27:31,776 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 199 places, 217 transitions, 455 flow [2023-09-01 09:27:31,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 217 transitions, 455 flow [2023-09-01 09:27:31,804 INFO L130 PetriNetUnfolder]: 28/251 cut-off events. [2023-09-01 09:27:31,805 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 09:27:31,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 251 events. 28/251 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 756 event pairs, 0 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 198. Up to 8 conditions per place. [2023-09-01 09:27:31,820 INFO L119 LiptonReduction]: Number of co-enabled transitions 28272 [2023-09-01 09:27:33,994 INFO L134 LiptonReduction]: Checked pairs total: 57548 [2023-09-01 09:27:33,995 INFO L136 LiptonReduction]: Total number of compositions: 169 [2023-09-01 09:27:33,996 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:27:33,997 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:27:33,998 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:27:34,003 INFO L130 PetriNetUnfolder]: 7/62 cut-off events. [2023-09-01 09:27:34,003 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 09:27:34,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:27:34,003 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-09-01 09:27:34,004 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:27:34,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:27:34,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1774801914, now seen corresponding path program 1 times [2023-09-01 09:27:34,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:27:34,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228874317] [2023-09-01 09:27:34,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:27:34,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:27:34,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:27:34,022 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:27:34,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:27:34,047 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:27:34,047 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:27:34,048 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:27:34,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 09:27:34,048 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:27:34,049 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:27:34,049 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:27:34,049 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-09-01 09:27:34,093 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:27:34,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 256 places, 280 transitions, 592 flow [2023-09-01 09:27:34,141 INFO L130 PetriNetUnfolder]: 37/326 cut-off events. [2023-09-01 09:27:34,141 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 09:27:34,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349 conditions, 326 events. 37/326 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1138 event pairs, 0 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 260. Up to 10 conditions per place. [2023-09-01 09:27:34,144 INFO L82 GeneralOperation]: Start removeDead. Operand has 256 places, 280 transitions, 592 flow [2023-09-01 09:27:34,147 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 256 places, 280 transitions, 592 flow [2023-09-01 09:27:34,148 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:27:34,148 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 256 places, 280 transitions, 592 flow [2023-09-01 09:27:34,148 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 256 places, 280 transitions, 592 flow [2023-09-01 09:27:34,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 256 places, 280 transitions, 592 flow [2023-09-01 09:27:34,193 INFO L130 PetriNetUnfolder]: 37/326 cut-off events. [2023-09-01 09:27:34,194 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 09:27:34,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349 conditions, 326 events. 37/326 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1138 event pairs, 0 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 260. Up to 10 conditions per place. [2023-09-01 09:27:34,229 INFO L119 LiptonReduction]: Number of co-enabled transitions 53320 [2023-09-01 09:27:36,522 INFO L134 LiptonReduction]: Checked pairs total: 109875 [2023-09-01 09:27:36,522 INFO L136 LiptonReduction]: Total number of compositions: 228 [2023-09-01 09:27:36,524 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:27:36,525 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:27:36,525 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:27:36,534 INFO L130 PetriNetUnfolder]: 11/92 cut-off events. [2023-09-01 09:27:36,534 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 09:27:36,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:27:36,534 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-09-01 09:27:36,535 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:27:36,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:27:36,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1252805735, now seen corresponding path program 1 times [2023-09-01 09:27:36,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:27:36,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139300730] [2023-09-01 09:27:36,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:27:36,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:27:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:27:36,554 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:27:36,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:27:36,572 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:27:36,573 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:27:36,573 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:27:36,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 09:27:36,573 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:27:36,574 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:27:36,574 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:27:36,574 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-09-01 09:27:36,626 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:27:36,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 313 places, 343 transitions, 731 flow [2023-09-01 09:27:36,691 INFO L130 PetriNetUnfolder]: 46/401 cut-off events. [2023-09-01 09:27:36,691 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 09:27:36,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 401 events. 46/401 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1522 event pairs, 0 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 339. Up to 12 conditions per place. [2023-09-01 09:27:36,697 INFO L82 GeneralOperation]: Start removeDead. Operand has 313 places, 343 transitions, 731 flow [2023-09-01 09:27:36,702 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 313 places, 343 transitions, 731 flow [2023-09-01 09:27:36,702 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:27:36,702 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 313 places, 343 transitions, 731 flow [2023-09-01 09:27:36,702 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 313 places, 343 transitions, 731 flow [2023-09-01 09:27:36,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 313 places, 343 transitions, 731 flow [2023-09-01 09:27:36,766 INFO L130 PetriNetUnfolder]: 46/401 cut-off events. [2023-09-01 09:27:36,767 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 09:27:36,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 401 events. 46/401 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1522 event pairs, 0 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 339. Up to 12 conditions per place. [2023-09-01 09:27:36,805 INFO L119 LiptonReduction]: Number of co-enabled transitions 86180 [2023-09-01 09:27:39,495 INFO L134 LiptonReduction]: Checked pairs total: 177753 [2023-09-01 09:27:39,496 INFO L136 LiptonReduction]: Total number of compositions: 264 [2023-09-01 09:27:39,498 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:27:39,498 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:27:39,498 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:27:39,511 INFO L130 PetriNetUnfolder]: 13/115 cut-off events. [2023-09-01 09:27:39,512 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 09:27:39,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:27:39,512 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:27:39,512 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:27:39,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:27:39,513 INFO L85 PathProgramCache]: Analyzing trace with hash -528600392, now seen corresponding path program 1 times [2023-09-01 09:27:39,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:27:39,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845354993] [2023-09-01 09:27:39,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:27:39,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:27:39,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:27:39,536 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:27:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:27:39,553 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:27:39,553 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:27:39,554 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:27:39,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 09:27:39,554 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:27:39,555 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:27:39,555 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:27:39,555 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-09-01 09:27:39,600 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:27:39,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 370 places, 406 transitions, 872 flow [2023-09-01 09:27:39,706 INFO L130 PetriNetUnfolder]: 55/476 cut-off events. [2023-09-01 09:27:39,707 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 09:27:39,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 516 conditions, 476 events. 55/476 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1910 event pairs, 0 based on Foata normal form. 0/408 useless extension candidates. Maximal degree in co-relation 420. Up to 14 conditions per place. [2023-09-01 09:27:39,716 INFO L82 GeneralOperation]: Start removeDead. Operand has 370 places, 406 transitions, 872 flow [2023-09-01 09:27:39,722 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 370 places, 406 transitions, 872 flow [2023-09-01 09:27:39,722 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:27:39,722 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 370 places, 406 transitions, 872 flow [2023-09-01 09:27:39,723 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 370 places, 406 transitions, 872 flow [2023-09-01 09:27:39,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 370 places, 406 transitions, 872 flow [2023-09-01 09:27:39,835 INFO L130 PetriNetUnfolder]: 55/476 cut-off events. [2023-09-01 09:27:39,835 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 09:27:39,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 516 conditions, 476 events. 55/476 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1910 event pairs, 0 based on Foata normal form. 0/408 useless extension candidates. Maximal degree in co-relation 420. Up to 14 conditions per place. [2023-09-01 09:27:39,872 INFO L119 LiptonReduction]: Number of co-enabled transitions 126852 [2023-09-01 09:27:42,935 INFO L134 LiptonReduction]: Checked pairs total: 264382 [2023-09-01 09:27:42,936 INFO L136 LiptonReduction]: Total number of compositions: 327 [2023-09-01 09:27:42,937 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:27:42,938 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:27:42,938 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:27:42,953 INFO L130 PetriNetUnfolder]: 19/146 cut-off events. [2023-09-01 09:27:42,954 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 09:27:42,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:27:42,954 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:27:42,954 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:27:42,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:27:42,955 INFO L85 PathProgramCache]: Analyzing trace with hash -221858652, now seen corresponding path program 1 times [2023-09-01 09:27:42,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:27:42,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247336060] [2023-09-01 09:27:42,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:27:42,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:27:42,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:27:42,976 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:27:42,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:27:43,012 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:27:43,012 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:27:43,012 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:27:43,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 09:27:43,013 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:27:43,013 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:27:43,014 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:27:43,014 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-09-01 09:27:43,077 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:27:43,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 427 places, 469 transitions, 1015 flow [2023-09-01 09:27:43,193 INFO L130 PetriNetUnfolder]: 64/551 cut-off events. [2023-09-01 09:27:43,194 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-09-01 09:27:43,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 601 conditions, 551 events. 64/551 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2257 event pairs, 0 based on Foata normal form. 0/472 useless extension candidates. Maximal degree in co-relation 503. Up to 16 conditions per place. [2023-09-01 09:27:43,202 INFO L82 GeneralOperation]: Start removeDead. Operand has 427 places, 469 transitions, 1015 flow [2023-09-01 09:27:43,212 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 427 places, 469 transitions, 1015 flow [2023-09-01 09:27:43,212 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:27:43,212 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 427 places, 469 transitions, 1015 flow [2023-09-01 09:27:43,212 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 427 places, 469 transitions, 1015 flow [2023-09-01 09:27:43,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 427 places, 469 transitions, 1015 flow [2023-09-01 09:27:43,340 INFO L130 PetriNetUnfolder]: 64/551 cut-off events. [2023-09-01 09:27:43,340 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-09-01 09:27:43,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 601 conditions, 551 events. 64/551 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2257 event pairs, 0 based on Foata normal form. 0/472 useless extension candidates. Maximal degree in co-relation 503. Up to 16 conditions per place. [2023-09-01 09:27:43,383 INFO L119 LiptonReduction]: Number of co-enabled transitions 175336 [2023-09-01 09:27:47,185 INFO L134 LiptonReduction]: Checked pairs total: 375636 [2023-09-01 09:27:47,185 INFO L136 LiptonReduction]: Total number of compositions: 368 [2023-09-01 09:27:47,187 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:27:47,188 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:27:47,188 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:27:47,212 INFO L130 PetriNetUnfolder]: 24/181 cut-off events. [2023-09-01 09:27:47,212 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-09-01 09:27:47,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:27:47,212 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:27:47,213 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:27:47,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:27:47,213 INFO L85 PathProgramCache]: Analyzing trace with hash -282505083, now seen corresponding path program 1 times [2023-09-01 09:27:47,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:27:47,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270589552] [2023-09-01 09:27:47,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:27:47,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:27:47,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:27:47,239 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:27:47,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:27:47,259 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:27:47,259 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:27:47,260 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:27:47,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 09:27:47,260 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:27:47,261 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:27:47,261 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:27:47,261 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-09-01 09:27:47,322 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:27:47,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 484 places, 532 transitions, 1160 flow [2023-09-01 09:27:47,487 INFO L130 PetriNetUnfolder]: 73/626 cut-off events. [2023-09-01 09:27:47,487 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-09-01 09:27:47,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 687 conditions, 626 events. 73/626 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2624 event pairs, 0 based on Foata normal form. 0/536 useless extension candidates. Maximal degree in co-relation 588. Up to 18 conditions per place. [2023-09-01 09:27:47,495 INFO L82 GeneralOperation]: Start removeDead. Operand has 484 places, 532 transitions, 1160 flow [2023-09-01 09:27:47,501 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 484 places, 532 transitions, 1160 flow [2023-09-01 09:27:47,502 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:27:47,502 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 484 places, 532 transitions, 1160 flow [2023-09-01 09:27:47,502 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 484 places, 532 transitions, 1160 flow [2023-09-01 09:27:47,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 484 places, 532 transitions, 1160 flow [2023-09-01 09:27:47,631 INFO L130 PetriNetUnfolder]: 73/626 cut-off events. [2023-09-01 09:27:47,631 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-09-01 09:27:47,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 687 conditions, 626 events. 73/626 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2624 event pairs, 0 based on Foata normal form. 0/536 useless extension candidates. Maximal degree in co-relation 588. Up to 18 conditions per place. [2023-09-01 09:27:47,746 INFO L119 LiptonReduction]: Number of co-enabled transitions 231632 [2023-09-01 09:27:51,631 INFO L134 LiptonReduction]: Checked pairs total: 488450 [2023-09-01 09:27:51,631 INFO L136 LiptonReduction]: Total number of compositions: 410 [2023-09-01 09:27:51,633 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:27:51,634 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:27:51,634 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:27:51,667 INFO L130 PetriNetUnfolder]: 27/207 cut-off events. [2023-09-01 09:27:51,667 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-09-01 09:27:51,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:27:51,667 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:27:51,668 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:27:51,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:27:51,668 INFO L85 PathProgramCache]: Analyzing trace with hash 826540551, now seen corresponding path program 1 times [2023-09-01 09:27:51,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:27:51,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504982973] [2023-09-01 09:27:51,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:27:51,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:27:51,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:27:51,707 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:27:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:27:51,743 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:27:51,745 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:27:51,746 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:27:51,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 09:27:51,746 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:27:51,748 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:27:51,748 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:27:51,748 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-09-01 09:27:51,825 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:27:51,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 541 places, 595 transitions, 1307 flow [2023-09-01 09:27:51,989 INFO L130 PetriNetUnfolder]: 82/701 cut-off events. [2023-09-01 09:27:51,989 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-09-01 09:27:52,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 774 conditions, 701 events. 82/701 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2977 event pairs, 0 based on Foata normal form. 0/600 useless extension candidates. Maximal degree in co-relation 674. Up to 20 conditions per place. [2023-09-01 09:27:52,004 INFO L82 GeneralOperation]: Start removeDead. Operand has 541 places, 595 transitions, 1307 flow [2023-09-01 09:27:52,012 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 541 places, 595 transitions, 1307 flow [2023-09-01 09:27:52,012 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:27:52,012 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 541 places, 595 transitions, 1307 flow [2023-09-01 09:27:52,013 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 541 places, 595 transitions, 1307 flow [2023-09-01 09:27:52,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 541 places, 595 transitions, 1307 flow [2023-09-01 09:27:52,182 INFO L130 PetriNetUnfolder]: 82/701 cut-off events. [2023-09-01 09:27:52,182 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-09-01 09:27:52,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 774 conditions, 701 events. 82/701 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2977 event pairs, 0 based on Foata normal form. 0/600 useless extension candidates. Maximal degree in co-relation 674. Up to 20 conditions per place. [2023-09-01 09:27:52,249 INFO L119 LiptonReduction]: Number of co-enabled transitions 295740 [2023-09-01 09:27:56,486 INFO L134 LiptonReduction]: Checked pairs total: 635952 [2023-09-01 09:27:56,486 INFO L136 LiptonReduction]: Total number of compositions: 473 [2023-09-01 09:27:56,488 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:27:56,489 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:27:56,489 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:27:56,515 INFO L130 PetriNetUnfolder]: 35/237 cut-off events. [2023-09-01 09:27:56,515 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-09-01 09:27:56,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:27:56,515 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:27:56,515 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:27:56,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:27:56,516 INFO L85 PathProgramCache]: Analyzing trace with hash -423094892, now seen corresponding path program 1 times [2023-09-01 09:27:56,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:27:56,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516569324] [2023-09-01 09:27:56,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:27:56,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:27:56,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:27:56,546 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:27:56,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:27:56,577 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:27:56,578 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:27:56,578 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:27:56,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 09:27:56,578 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:27:56,578 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:27:56,579 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:27:56,579 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-09-01 09:27:56,645 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:27:56,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 598 places, 658 transitions, 1456 flow [2023-09-01 09:27:56,838 INFO L130 PetriNetUnfolder]: 91/776 cut-off events. [2023-09-01 09:27:56,838 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-09-01 09:27:56,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 862 conditions, 776 events. 91/776 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 3355 event pairs, 0 based on Foata normal form. 0/664 useless extension candidates. Maximal degree in co-relation 761. Up to 22 conditions per place. [2023-09-01 09:27:56,851 INFO L82 GeneralOperation]: Start removeDead. Operand has 598 places, 658 transitions, 1456 flow [2023-09-01 09:27:56,860 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 598 places, 658 transitions, 1456 flow [2023-09-01 09:27:56,860 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:27:56,860 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 598 places, 658 transitions, 1456 flow [2023-09-01 09:27:56,861 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 598 places, 658 transitions, 1456 flow [2023-09-01 09:27:56,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 598 places, 658 transitions, 1456 flow [2023-09-01 09:27:57,088 INFO L130 PetriNetUnfolder]: 91/776 cut-off events. [2023-09-01 09:27:57,088 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-09-01 09:27:57,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 862 conditions, 776 events. 91/776 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 3355 event pairs, 0 based on Foata normal form. 0/664 useless extension candidates. Maximal degree in co-relation 761. Up to 22 conditions per place. [2023-09-01 09:27:57,184 INFO L119 LiptonReduction]: Number of co-enabled transitions 367660 [2023-09-01 09:28:02,113 INFO L134 LiptonReduction]: Checked pairs total: 779380 [2023-09-01 09:28:02,113 INFO L136 LiptonReduction]: Total number of compositions: 527 [2023-09-01 09:28:02,115 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:28:02,115 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:28:02,115 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:28:02,170 INFO L130 PetriNetUnfolder]: 37/260 cut-off events. [2023-09-01 09:28:02,170 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-09-01 09:28:02,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:28:02,171 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:28:02,171 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:28:02,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:28:02,171 INFO L85 PathProgramCache]: Analyzing trace with hash -608990272, now seen corresponding path program 1 times [2023-09-01 09:28:02,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:28:02,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082546550] [2023-09-01 09:28:02,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:28:02,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:28:02,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:02,207 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:28:02,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:02,232 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:28:02,232 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:28:02,232 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:28:02,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 09:28:02,232 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:28:02,233 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:28:02,233 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:28:02,233 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-09-01 09:28:02,313 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:28:02,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 655 places, 721 transitions, 1607 flow [2023-09-01 09:28:02,495 INFO L130 PetriNetUnfolder]: 100/851 cut-off events. [2023-09-01 09:28:02,495 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-09-01 09:28:02,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 851 events. 100/851 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 3729 event pairs, 0 based on Foata normal form. 0/728 useless extension candidates. Maximal degree in co-relation 849. Up to 24 conditions per place. [2023-09-01 09:28:02,511 INFO L82 GeneralOperation]: Start removeDead. Operand has 655 places, 721 transitions, 1607 flow [2023-09-01 09:28:02,522 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 655 places, 721 transitions, 1607 flow [2023-09-01 09:28:02,523 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:28:02,523 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 655 places, 721 transitions, 1607 flow [2023-09-01 09:28:02,523 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 655 places, 721 transitions, 1607 flow [2023-09-01 09:28:02,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 655 places, 721 transitions, 1607 flow [2023-09-01 09:28:02,827 INFO L130 PetriNetUnfolder]: 100/851 cut-off events. [2023-09-01 09:28:02,827 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-09-01 09:28:02,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 851 events. 100/851 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 3729 event pairs, 0 based on Foata normal form. 0/728 useless extension candidates. Maximal degree in co-relation 849. Up to 24 conditions per place. [2023-09-01 09:28:02,902 INFO L119 LiptonReduction]: Number of co-enabled transitions 447392 [2023-09-01 09:28:07,472 INFO L134 LiptonReduction]: Checked pairs total: 940550 [2023-09-01 09:28:07,472 INFO L136 LiptonReduction]: Total number of compositions: 574 [2023-09-01 09:28:07,474 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:28:07,474 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:28:07,474 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:28:07,506 INFO L130 PetriNetUnfolder]: 42/297 cut-off events. [2023-09-01 09:28:07,507 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-09-01 09:28:07,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:28:07,507 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:28:07,507 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:28:07,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:28:07,508 INFO L85 PathProgramCache]: Analyzing trace with hash 2041386709, now seen corresponding path program 1 times [2023-09-01 09:28:07,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:28:07,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120616910] [2023-09-01 09:28:07,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:28:07,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:28:07,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:07,543 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:28:07,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:07,565 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:28:07,566 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:28:07,566 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:28:07,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 09:28:07,566 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:28:07,568 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:28:07,568 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:28:07,569 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-09-01 09:28:07,650 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:28:07,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 712 places, 784 transitions, 1760 flow [2023-09-01 09:28:07,924 INFO L130 PetriNetUnfolder]: 109/926 cut-off events. [2023-09-01 09:28:07,924 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-09-01 09:28:07,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1041 conditions, 926 events. 109/926 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 4109 event pairs, 0 based on Foata normal form. 0/792 useless extension candidates. Maximal degree in co-relation 938. Up to 26 conditions per place. [2023-09-01 09:28:07,940 INFO L82 GeneralOperation]: Start removeDead. Operand has 712 places, 784 transitions, 1760 flow [2023-09-01 09:28:07,949 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 712 places, 784 transitions, 1760 flow [2023-09-01 09:28:07,949 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:28:07,950 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 712 places, 784 transitions, 1760 flow [2023-09-01 09:28:07,950 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 712 places, 784 transitions, 1760 flow [2023-09-01 09:28:07,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 712 places, 784 transitions, 1760 flow [2023-09-01 09:28:08,210 INFO L130 PetriNetUnfolder]: 109/926 cut-off events. [2023-09-01 09:28:08,210 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-09-01 09:28:08,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1041 conditions, 926 events. 109/926 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 4109 event pairs, 0 based on Foata normal form. 0/792 useless extension candidates. Maximal degree in co-relation 938. Up to 26 conditions per place. [2023-09-01 09:28:08,346 INFO L119 LiptonReduction]: Number of co-enabled transitions 534936 [2023-09-01 09:28:14,100 INFO L134 LiptonReduction]: Checked pairs total: 1128286 [2023-09-01 09:28:14,100 INFO L136 LiptonReduction]: Total number of compositions: 614 [2023-09-01 09:28:14,103 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:28:14,103 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:28:14,103 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:28:14,136 INFO L130 PetriNetUnfolder]: 44/320 cut-off events. [2023-09-01 09:28:14,136 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-09-01 09:28:14,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:28:14,137 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 09:28:14,137 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:28:14,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:28:14,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1785523453, now seen corresponding path program 1 times [2023-09-01 09:28:14,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:28:14,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358920714] [2023-09-01 09:28:14,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:28:14,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:28:14,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:14,160 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:28:14,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:14,183 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:28:14,183 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:28:14,183 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:28:14,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 09:28:14,184 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:28:14,184 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:28:14,184 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:28:14,184 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-09-01 09:28:14,275 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:28:14,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 769 places, 847 transitions, 1915 flow [2023-09-01 09:28:14,629 INFO L130 PetriNetUnfolder]: 118/1001 cut-off events. [2023-09-01 09:28:14,629 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-09-01 09:28:14,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1132 conditions, 1001 events. 118/1001 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 4473 event pairs, 0 based on Foata normal form. 0/856 useless extension candidates. Maximal degree in co-relation 1028. Up to 28 conditions per place. [2023-09-01 09:28:14,652 INFO L82 GeneralOperation]: Start removeDead. Operand has 769 places, 847 transitions, 1915 flow [2023-09-01 09:28:14,662 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 769 places, 847 transitions, 1915 flow [2023-09-01 09:28:14,662 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:28:14,662 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 769 places, 847 transitions, 1915 flow [2023-09-01 09:28:14,662 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 769 places, 847 transitions, 1915 flow [2023-09-01 09:28:14,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 769 places, 847 transitions, 1915 flow [2023-09-01 09:28:14,939 INFO L130 PetriNetUnfolder]: 118/1001 cut-off events. [2023-09-01 09:28:14,939 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-09-01 09:28:14,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1132 conditions, 1001 events. 118/1001 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 4473 event pairs, 0 based on Foata normal form. 0/856 useless extension candidates. Maximal degree in co-relation 1028. Up to 28 conditions per place. [2023-09-01 09:28:15,053 INFO L119 LiptonReduction]: Number of co-enabled transitions 630292 [2023-09-01 09:28:21,475 INFO L134 LiptonReduction]: Checked pairs total: 1341615 [2023-09-01 09:28:21,475 INFO L136 LiptonReduction]: Total number of compositions: 679 [2023-09-01 09:28:21,477 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:28:21,478 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:28:21,479 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:28:21,529 INFO L130 PetriNetUnfolder]: 52/353 cut-off events. [2023-09-01 09:28:21,530 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-09-01 09:28:21,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:28:21,530 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 09:28:21,530 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:28:21,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:28:21,531 INFO L85 PathProgramCache]: Analyzing trace with hash 127424546, now seen corresponding path program 1 times [2023-09-01 09:28:21,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:28:21,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241840048] [2023-09-01 09:28:21,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:28:21,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:28:21,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:21,555 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:28:21,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:21,580 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:28:21,581 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:28:21,581 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:28:21,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 09:28:21,581 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:28:21,582 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:28:21,582 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:28:21,582 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-09-01 09:28:21,680 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:28:21,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 826 places, 910 transitions, 2072 flow [2023-09-01 09:28:22,073 INFO L130 PetriNetUnfolder]: 127/1076 cut-off events. [2023-09-01 09:28:22,073 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-09-01 09:28:22,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1224 conditions, 1076 events. 127/1076 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 4865 event pairs, 0 based on Foata normal form. 0/920 useless extension candidates. Maximal degree in co-relation 1119. Up to 30 conditions per place. [2023-09-01 09:28:22,106 INFO L82 GeneralOperation]: Start removeDead. Operand has 826 places, 910 transitions, 2072 flow [2023-09-01 09:28:22,120 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 826 places, 910 transitions, 2072 flow [2023-09-01 09:28:22,121 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:28:22,121 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 826 places, 910 transitions, 2072 flow [2023-09-01 09:28:22,121 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 826 places, 910 transitions, 2072 flow [2023-09-01 09:28:22,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 826 places, 910 transitions, 2072 flow [2023-09-01 09:28:22,430 INFO L130 PetriNetUnfolder]: 127/1076 cut-off events. [2023-09-01 09:28:22,430 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-09-01 09:28:22,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1224 conditions, 1076 events. 127/1076 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 4865 event pairs, 0 based on Foata normal form. 0/920 useless extension candidates. Maximal degree in co-relation 1119. Up to 30 conditions per place. [2023-09-01 09:28:22,573 INFO L119 LiptonReduction]: Number of co-enabled transitions 733460 [2023-09-01 09:28:28,626 INFO L134 LiptonReduction]: Checked pairs total: 1586939 [2023-09-01 09:28:28,626 INFO L136 LiptonReduction]: Total number of compositions: 725 [2023-09-01 09:28:28,627 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:28:28,628 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:28:28,628 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:28:28,669 INFO L130 PetriNetUnfolder]: 55/380 cut-off events. [2023-09-01 09:28:28,670 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-09-01 09:28:28,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:28:28,670 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 09:28:28,670 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:28:28,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:28:28,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1402274288, now seen corresponding path program 1 times [2023-09-01 09:28:28,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:28:28,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998931118] [2023-09-01 09:28:28,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:28:28,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:28:28,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:28,709 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:28:28,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:28,736 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:28:28,737 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:28:28,737 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:28:28,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-09-01 09:28:28,737 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:28:28,738 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:28:28,738 WARN L233 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:28:28,738 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2023-09-01 09:28:28,846 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:28:28,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 883 places, 973 transitions, 2231 flow [2023-09-01 09:28:29,251 INFO L130 PetriNetUnfolder]: 136/1151 cut-off events. [2023-09-01 09:28:29,252 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-09-01 09:28:29,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1317 conditions, 1151 events. 136/1151 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 5240 event pairs, 0 based on Foata normal form. 0/984 useless extension candidates. Maximal degree in co-relation 1211. Up to 32 conditions per place. [2023-09-01 09:28:29,276 INFO L82 GeneralOperation]: Start removeDead. Operand has 883 places, 973 transitions, 2231 flow [2023-09-01 09:28:29,288 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 883 places, 973 transitions, 2231 flow [2023-09-01 09:28:29,288 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:28:29,288 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 883 places, 973 transitions, 2231 flow [2023-09-01 09:28:29,289 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 883 places, 973 transitions, 2231 flow [2023-09-01 09:28:29,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 883 places, 973 transitions, 2231 flow [2023-09-01 09:28:29,612 INFO L130 PetriNetUnfolder]: 136/1151 cut-off events. [2023-09-01 09:28:29,612 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-09-01 09:28:29,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1317 conditions, 1151 events. 136/1151 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 5240 event pairs, 0 based on Foata normal form. 0/984 useless extension candidates. Maximal degree in co-relation 1211. Up to 32 conditions per place. [2023-09-01 09:28:29,775 INFO L119 LiptonReduction]: Number of co-enabled transitions 844440 [2023-09-01 09:28:37,475 INFO L134 LiptonReduction]: Checked pairs total: 1824903 [2023-09-01 09:28:37,476 INFO L136 LiptonReduction]: Total number of compositions: 780 [2023-09-01 09:28:37,477 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:28:37,477 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:28:37,478 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:28:37,525 INFO L130 PetriNetUnfolder]: 60/404 cut-off events. [2023-09-01 09:28:37,525 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-09-01 09:28:37,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:28:37,525 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 09:28:37,526 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:28:37,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:28:37,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1657160077, now seen corresponding path program 1 times [2023-09-01 09:28:37,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:28:37,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127268591] [2023-09-01 09:28:37,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:28:37,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:28:37,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:37,557 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:28:37,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:37,586 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:28:37,588 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:28:37,589 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:28:37,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-09-01 09:28:37,589 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:28:37,590 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:28:37,590 WARN L233 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:28:37,590 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2023-09-01 09:28:37,696 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:28:37,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 940 places, 1036 transitions, 2392 flow [2023-09-01 09:28:38,102 INFO L130 PetriNetUnfolder]: 145/1226 cut-off events. [2023-09-01 09:28:38,102 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-09-01 09:28:38,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1411 conditions, 1226 events. 145/1226 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 5607 event pairs, 0 based on Foata normal form. 0/1048 useless extension candidates. Maximal degree in co-relation 1304. Up to 34 conditions per place. [2023-09-01 09:28:38,137 INFO L82 GeneralOperation]: Start removeDead. Operand has 940 places, 1036 transitions, 2392 flow [2023-09-01 09:28:38,151 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 940 places, 1036 transitions, 2392 flow [2023-09-01 09:28:38,152 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:28:38,152 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 940 places, 1036 transitions, 2392 flow [2023-09-01 09:28:38,152 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 940 places, 1036 transitions, 2392 flow [2023-09-01 09:28:38,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 940 places, 1036 transitions, 2392 flow [2023-09-01 09:28:38,502 INFO L130 PetriNetUnfolder]: 145/1226 cut-off events. [2023-09-01 09:28:38,502 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-09-01 09:28:38,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1411 conditions, 1226 events. 145/1226 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 5607 event pairs, 0 based on Foata normal form. 0/1048 useless extension candidates. Maximal degree in co-relation 1304. Up to 34 conditions per place. [2023-09-01 09:28:38,678 INFO L119 LiptonReduction]: Number of co-enabled transitions 963232 [2023-09-01 09:28:46,214 INFO L134 LiptonReduction]: Checked pairs total: 2061306 [2023-09-01 09:28:46,215 INFO L136 LiptonReduction]: Total number of compositions: 820 [2023-09-01 09:28:46,216 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:28:46,217 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:28:46,217 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:28:46,286 INFO L130 PetriNetUnfolder]: 66/449 cut-off events. [2023-09-01 09:28:46,287 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-09-01 09:28:46,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:28:46,287 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 09:28:46,287 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:28:46,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:28:46,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1701743203, now seen corresponding path program 1 times [2023-09-01 09:28:46,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:28:46,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442344499] [2023-09-01 09:28:46,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:28:46,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:28:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:46,316 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:28:46,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:46,349 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:28:46,350 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:28:46,350 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:28:46,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-09-01 09:28:46,350 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:28:46,351 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:28:46,351 WARN L233 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:28:46,351 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2023-09-01 09:28:46,461 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:28:46,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 997 places, 1099 transitions, 2555 flow [2023-09-01 09:28:46,952 INFO L130 PetriNetUnfolder]: 154/1301 cut-off events. [2023-09-01 09:28:46,953 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-09-01 09:28:46,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1506 conditions, 1301 events. 154/1301 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 6007 event pairs, 0 based on Foata normal form. 0/1112 useless extension candidates. Maximal degree in co-relation 1398. Up to 36 conditions per place. [2023-09-01 09:28:46,994 INFO L82 GeneralOperation]: Start removeDead. Operand has 997 places, 1099 transitions, 2555 flow [2023-09-01 09:28:47,010 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 997 places, 1099 transitions, 2555 flow [2023-09-01 09:28:47,010 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:28:47,010 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 997 places, 1099 transitions, 2555 flow [2023-09-01 09:28:47,010 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 997 places, 1099 transitions, 2555 flow [2023-09-01 09:28:47,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 997 places, 1099 transitions, 2555 flow [2023-09-01 09:28:47,416 INFO L130 PetriNetUnfolder]: 154/1301 cut-off events. [2023-09-01 09:28:47,416 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-09-01 09:28:47,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1506 conditions, 1301 events. 154/1301 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 6007 event pairs, 0 based on Foata normal form. 0/1112 useless extension candidates. Maximal degree in co-relation 1398. Up to 36 conditions per place. [2023-09-01 09:28:47,592 INFO L119 LiptonReduction]: Number of co-enabled transitions 1089836 [2023-09-01 09:28:55,712 INFO L134 LiptonReduction]: Checked pairs total: 2316243 [2023-09-01 09:28:55,712 INFO L136 LiptonReduction]: Total number of compositions: 882 [2023-09-01 09:28:55,713 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:28:55,714 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:28:55,714 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:28:55,812 INFO L130 PetriNetUnfolder]: 67/463 cut-off events. [2023-09-01 09:28:55,812 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-09-01 09:28:55,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:28:55,812 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 09:28:55,813 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:28:55,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:28:55,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1644266573, now seen corresponding path program 1 times [2023-09-01 09:28:55,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:28:55,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974665970] [2023-09-01 09:28:55,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:28:55,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:28:55,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:55,846 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:28:55,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:55,890 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:28:55,890 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:28:55,891 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:28:55,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-09-01 09:28:55,891 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:28:55,891 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:28:55,891 WARN L233 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:28:55,892 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2023-09-01 09:28:56,009 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:28:56,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1054 places, 1162 transitions, 2720 flow [2023-09-01 09:28:56,617 INFO L130 PetriNetUnfolder]: 163/1376 cut-off events. [2023-09-01 09:28:56,617 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-09-01 09:28:56,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1602 conditions, 1376 events. 163/1376 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 6358 event pairs, 0 based on Foata normal form. 0/1176 useless extension candidates. Maximal degree in co-relation 1493. Up to 38 conditions per place. [2023-09-01 09:28:56,663 INFO L82 GeneralOperation]: Start removeDead. Operand has 1054 places, 1162 transitions, 2720 flow [2023-09-01 09:28:56,681 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1054 places, 1162 transitions, 2720 flow [2023-09-01 09:28:56,681 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:28:56,681 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1054 places, 1162 transitions, 2720 flow [2023-09-01 09:28:56,681 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1054 places, 1162 transitions, 2720 flow [2023-09-01 09:28:56,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1054 places, 1162 transitions, 2720 flow [2023-09-01 09:28:57,188 INFO L130 PetriNetUnfolder]: 163/1376 cut-off events. [2023-09-01 09:28:57,189 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-09-01 09:28:57,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1602 conditions, 1376 events. 163/1376 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 6358 event pairs, 0 based on Foata normal form. 0/1176 useless extension candidates. Maximal degree in co-relation 1493. Up to 38 conditions per place. [2023-09-01 09:28:57,375 INFO L119 LiptonReduction]: Number of co-enabled transitions 1224252 [2023-09-01 09:29:06,124 INFO L134 LiptonReduction]: Checked pairs total: 2620887 [2023-09-01 09:29:06,124 INFO L136 LiptonReduction]: Total number of compositions: 933 [2023-09-01 09:29:06,127 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:29:06,127 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:29:06,127 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:29:06,199 INFO L130 PetriNetUnfolder]: 78/508 cut-off events. [2023-09-01 09:29:06,199 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-09-01 09:29:06,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:29:06,199 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 09:29:06,199 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:29:06,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:29:06,200 INFO L85 PathProgramCache]: Analyzing trace with hash -520845519, now seen corresponding path program 1 times [2023-09-01 09:29:06,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:29:06,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008908619] [2023-09-01 09:29:06,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:29:06,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:29:06,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:29:06,234 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:29:06,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:29:06,265 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:29:06,265 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:29:06,265 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:29:06,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-09-01 09:29:06,266 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:29:06,266 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:29:06,266 WARN L233 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:29:06,266 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2023-09-01 09:29:06,383 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:29:06,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1111 places, 1225 transitions, 2887 flow [2023-09-01 09:29:06,907 INFO L130 PetriNetUnfolder]: 172/1451 cut-off events. [2023-09-01 09:29:06,907 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-09-01 09:29:06,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1699 conditions, 1451 events. 172/1451 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 6735 event pairs, 0 based on Foata normal form. 0/1240 useless extension candidates. Maximal degree in co-relation 1589. Up to 40 conditions per place. [2023-09-01 09:29:06,957 INFO L82 GeneralOperation]: Start removeDead. Operand has 1111 places, 1225 transitions, 2887 flow [2023-09-01 09:29:06,977 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1111 places, 1225 transitions, 2887 flow [2023-09-01 09:29:06,977 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:29:06,977 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1111 places, 1225 transitions, 2887 flow [2023-09-01 09:29:06,978 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1111 places, 1225 transitions, 2887 flow [2023-09-01 09:29:06,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1111 places, 1225 transitions, 2887 flow [2023-09-01 09:29:07,447 INFO L130 PetriNetUnfolder]: 172/1451 cut-off events. [2023-09-01 09:29:07,447 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-09-01 09:29:07,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1699 conditions, 1451 events. 172/1451 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 6735 event pairs, 0 based on Foata normal form. 0/1240 useless extension candidates. Maximal degree in co-relation 1589. Up to 40 conditions per place. [2023-09-01 09:29:07,719 INFO L119 LiptonReduction]: Number of co-enabled transitions 1366480 [2023-09-01 09:29:17,609 INFO L134 LiptonReduction]: Checked pairs total: 2910520 [2023-09-01 09:29:17,610 INFO L136 LiptonReduction]: Total number of compositions: 974 [2023-09-01 09:29:17,611 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:29:17,612 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:29:17,612 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:29:17,690 INFO L130 PetriNetUnfolder]: 78/532 cut-off events. [2023-09-01 09:29:17,690 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-09-01 09:29:17,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:29:17,691 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 09:29:17,691 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:29:17,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:29:17,691 INFO L85 PathProgramCache]: Analyzing trace with hash 909094616, now seen corresponding path program 1 times [2023-09-01 09:29:17,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:29:17,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808677] [2023-09-01 09:29:17,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:29:17,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:29:17,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:29:17,729 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:29:17,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:29:17,765 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:29:17,765 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:29:17,765 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:29:17,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-09-01 09:29:17,766 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:29:17,767 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:29:17,767 WARN L233 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:29:17,767 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2023-09-01 09:29:17,885 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:29:17,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1168 places, 1288 transitions, 3056 flow [2023-09-01 09:29:18,479 INFO L130 PetriNetUnfolder]: 181/1526 cut-off events. [2023-09-01 09:29:18,480 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-09-01 09:29:18,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1797 conditions, 1526 events. 181/1526 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 7128 event pairs, 0 based on Foata normal form. 0/1304 useless extension candidates. Maximal degree in co-relation 1686. Up to 42 conditions per place. [2023-09-01 09:29:18,525 INFO L82 GeneralOperation]: Start removeDead. Operand has 1168 places, 1288 transitions, 3056 flow [2023-09-01 09:29:18,541 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1168 places, 1288 transitions, 3056 flow [2023-09-01 09:29:18,541 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:29:18,542 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1168 places, 1288 transitions, 3056 flow [2023-09-01 09:29:18,542 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1168 places, 1288 transitions, 3056 flow [2023-09-01 09:29:18,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1168 places, 1288 transitions, 3056 flow [2023-09-01 09:29:19,050 INFO L130 PetriNetUnfolder]: 181/1526 cut-off events. [2023-09-01 09:29:19,051 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-09-01 09:29:19,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1797 conditions, 1526 events. 181/1526 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 7128 event pairs, 0 based on Foata normal form. 0/1304 useless extension candidates. Maximal degree in co-relation 1686. Up to 42 conditions per place. [2023-09-01 09:29:19,359 INFO L119 LiptonReduction]: Number of co-enabled transitions 1516520 [2023-09-01 09:29:29,466 INFO L134 LiptonReduction]: Checked pairs total: 3237949 [2023-09-01 09:29:29,467 INFO L136 LiptonReduction]: Total number of compositions: 1025 [2023-09-01 09:29:29,468 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:29:29,469 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:29:29,469 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:29:29,555 INFO L130 PetriNetUnfolder]: 86/562 cut-off events. [2023-09-01 09:29:29,556 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-09-01 09:29:29,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:29:29,556 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 09:29:29,556 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:29:29,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:29:29,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1441880411, now seen corresponding path program 1 times [2023-09-01 09:29:29,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:29:29,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46209175] [2023-09-01 09:29:29,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:29:29,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:29:29,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:29:29,597 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:29:29,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:29:29,634 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:29:29,635 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:29:29,635 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:29:29,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-09-01 09:29:29,635 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:29:29,636 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:29:29,636 WARN L233 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:29:29,636 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2023-09-01 09:29:29,778 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:29:29,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1225 places, 1351 transitions, 3227 flow [2023-09-01 09:29:30,392 INFO L130 PetriNetUnfolder]: 190/1601 cut-off events. [2023-09-01 09:29:30,392 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-09-01 09:29:30,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1896 conditions, 1601 events. 190/1601 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 7474 event pairs, 0 based on Foata normal form. 0/1368 useless extension candidates. Maximal degree in co-relation 1784. Up to 44 conditions per place. [2023-09-01 09:29:30,459 INFO L82 GeneralOperation]: Start removeDead. Operand has 1225 places, 1351 transitions, 3227 flow [2023-09-01 09:29:30,484 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1225 places, 1351 transitions, 3227 flow [2023-09-01 09:29:30,485 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:29:30,485 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1225 places, 1351 transitions, 3227 flow [2023-09-01 09:29:30,485 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1225 places, 1351 transitions, 3227 flow [2023-09-01 09:29:30,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1225 places, 1351 transitions, 3227 flow [2023-09-01 09:29:31,060 INFO L130 PetriNetUnfolder]: 190/1601 cut-off events. [2023-09-01 09:29:31,060 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-09-01 09:29:31,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1896 conditions, 1601 events. 190/1601 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 7474 event pairs, 0 based on Foata normal form. 0/1368 useless extension candidates. Maximal degree in co-relation 1784. Up to 44 conditions per place. [2023-09-01 09:29:31,347 INFO L119 LiptonReduction]: Number of co-enabled transitions 1674372 [2023-09-01 09:29:41,899 INFO L134 LiptonReduction]: Checked pairs total: 3555833 [2023-09-01 09:29:41,899 INFO L136 LiptonReduction]: Total number of compositions: 1067 [2023-09-01 09:29:41,901 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:29:41,902 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:29:41,902 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:29:42,086 INFO L130 PetriNetUnfolder]: 85/588 cut-off events. [2023-09-01 09:29:42,086 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-09-01 09:29:42,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:29:42,086 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 09:29:42,087 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:29:42,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:29:42,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1988911458, now seen corresponding path program 1 times [2023-09-01 09:29:42,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:29:42,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60939307] [2023-09-01 09:29:42,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:29:42,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:29:42,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:29:42,139 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:29:42,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:29:42,193 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:29:42,193 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:29:42,193 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:29:42,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-09-01 09:29:42,194 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:29:42,194 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:29:42,194 WARN L233 ceAbstractionStarter]: 21 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:29:42,194 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 22 thread instances. [2023-09-01 09:29:42,330 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:29:42,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1282 places, 1414 transitions, 3400 flow [2023-09-01 09:29:43,005 INFO L130 PetriNetUnfolder]: 199/1676 cut-off events. [2023-09-01 09:29:43,006 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-09-01 09:29:43,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1996 conditions, 1676 events. 199/1676 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 7881 event pairs, 0 based on Foata normal form. 0/1432 useless extension candidates. Maximal degree in co-relation 1883. Up to 46 conditions per place. [2023-09-01 09:29:43,081 INFO L82 GeneralOperation]: Start removeDead. Operand has 1282 places, 1414 transitions, 3400 flow [2023-09-01 09:29:43,108 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1282 places, 1414 transitions, 3400 flow [2023-09-01 09:29:43,108 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:29:43,108 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1282 places, 1414 transitions, 3400 flow [2023-09-01 09:29:43,108 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1282 places, 1414 transitions, 3400 flow [2023-09-01 09:29:43,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1282 places, 1414 transitions, 3400 flow [2023-09-01 09:29:43,877 INFO L130 PetriNetUnfolder]: 199/1676 cut-off events. [2023-09-01 09:29:43,878 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-09-01 09:29:43,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1996 conditions, 1676 events. 199/1676 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 7881 event pairs, 0 based on Foata normal form. 0/1432 useless extension candidates. Maximal degree in co-relation 1883. Up to 46 conditions per place. [2023-09-01 09:29:44,239 INFO L119 LiptonReduction]: Number of co-enabled transitions 1840036 [2023-09-01 09:29:55,695 INFO L134 LiptonReduction]: Checked pairs total: 3933991 [2023-09-01 09:29:55,695 INFO L136 LiptonReduction]: Total number of compositions: 1117 [2023-09-01 09:29:55,697 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:29:55,697 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:29:55,697 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:29:55,862 INFO L130 PetriNetUnfolder]: 90/617 cut-off events. [2023-09-01 09:29:55,862 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-09-01 09:29:55,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:29:55,862 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 09:29:55,862 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:29:55,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:29:55,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1604119119, now seen corresponding path program 1 times [2023-09-01 09:29:55,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:29:55,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067166092] [2023-09-01 09:29:55,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:29:55,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:29:55,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:29:55,909 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:29:55,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:29:55,961 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:29:55,962 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:29:55,962 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:29:55,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-09-01 09:29:55,962 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:29:55,963 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:29:55,963 WARN L233 ceAbstractionStarter]: 22 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:29:55,963 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 23 thread instances. [2023-09-01 09:29:56,135 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:29:56,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1339 places, 1477 transitions, 3575 flow [2023-09-01 09:29:56,976 INFO L130 PetriNetUnfolder]: 208/1751 cut-off events. [2023-09-01 09:29:56,976 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-09-01 09:29:57,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2097 conditions, 1751 events. 208/1751 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 8236 event pairs, 0 based on Foata normal form. 0/1496 useless extension candidates. Maximal degree in co-relation 1983. Up to 48 conditions per place. [2023-09-01 09:29:57,061 INFO L82 GeneralOperation]: Start removeDead. Operand has 1339 places, 1477 transitions, 3575 flow [2023-09-01 09:29:57,093 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1339 places, 1477 transitions, 3575 flow [2023-09-01 09:29:57,093 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:29:57,094 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1339 places, 1477 transitions, 3575 flow [2023-09-01 09:29:57,094 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1339 places, 1477 transitions, 3575 flow [2023-09-01 09:29:57,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1339 places, 1477 transitions, 3575 flow [2023-09-01 09:29:57,773 INFO L130 PetriNetUnfolder]: 208/1751 cut-off events. [2023-09-01 09:29:57,773 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-09-01 09:29:57,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2097 conditions, 1751 events. 208/1751 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 8236 event pairs, 0 based on Foata normal form. 0/1496 useless extension candidates. Maximal degree in co-relation 1983. Up to 48 conditions per place. [2023-09-01 09:29:58,408 INFO L119 LiptonReduction]: Number of co-enabled transitions 2013512 [2023-09-01 09:30:10,635 INFO L134 LiptonReduction]: Checked pairs total: 4273711 [2023-09-01 09:30:10,636 INFO L136 LiptonReduction]: Total number of compositions: 1183 [2023-09-01 09:30:10,637 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:30:10,638 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:30:10,638 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:30:10,862 INFO L130 PetriNetUnfolder]: 100/656 cut-off events. [2023-09-01 09:30:10,863 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-09-01 09:30:10,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:30:10,863 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 09:30:10,863 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:30:10,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:30:10,863 INFO L85 PathProgramCache]: Analyzing trace with hash 488388468, now seen corresponding path program 1 times [2023-09-01 09:30:10,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:30:10,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390038804] [2023-09-01 09:30:10,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:30:10,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:30:10,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:30:10,905 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:30:10,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:30:10,954 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:30:10,954 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:30:10,954 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:30:10,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-09-01 09:30:10,955 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:30:10,955 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:30:10,955 WARN L233 ceAbstractionStarter]: 23 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:30:10,955 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 24 thread instances. [2023-09-01 09:30:11,104 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:30:11,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1396 places, 1540 transitions, 3752 flow [2023-09-01 09:30:11,915 INFO L130 PetriNetUnfolder]: 217/1826 cut-off events. [2023-09-01 09:30:11,915 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-09-01 09:30:12,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2199 conditions, 1826 events. 217/1826 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 8543 event pairs, 0 based on Foata normal form. 0/1560 useless extension candidates. Maximal degree in co-relation 2084. Up to 50 conditions per place. [2023-09-01 09:30:12,006 INFO L82 GeneralOperation]: Start removeDead. Operand has 1396 places, 1540 transitions, 3752 flow [2023-09-01 09:30:12,043 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1396 places, 1540 transitions, 3752 flow [2023-09-01 09:30:12,043 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:30:12,043 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1396 places, 1540 transitions, 3752 flow [2023-09-01 09:30:12,044 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1396 places, 1540 transitions, 3752 flow [2023-09-01 09:30:12,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1396 places, 1540 transitions, 3752 flow [2023-09-01 09:30:12,989 INFO L130 PetriNetUnfolder]: 217/1826 cut-off events. [2023-09-01 09:30:12,989 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-09-01 09:30:13,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2199 conditions, 1826 events. 217/1826 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 8543 event pairs, 0 based on Foata normal form. 0/1560 useless extension candidates. Maximal degree in co-relation 2084. Up to 50 conditions per place. [2023-09-01 09:30:13,339 INFO L119 LiptonReduction]: Number of co-enabled transitions 2194800 [2023-09-01 09:30:26,357 INFO L134 LiptonReduction]: Checked pairs total: 4750852 [2023-09-01 09:30:26,357 INFO L136 LiptonReduction]: Total number of compositions: 1227 [2023-09-01 09:30:26,359 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:30:26,359 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:30:26,359 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:30:26,494 INFO L130 PetriNetUnfolder]: 106/688 cut-off events. [2023-09-01 09:30:26,494 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-09-01 09:30:26,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:30:26,494 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 09:30:26,494 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:30:26,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:30:26,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1429520027, now seen corresponding path program 1 times [2023-09-01 09:30:26,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:30:26,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335031654] [2023-09-01 09:30:26,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:30:26,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:30:26,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:30:26,541 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:30:26,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:30:26,591 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:30:26,592 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:30:26,592 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:30:26,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-09-01 09:30:26,592 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:30:26,593 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:30:26,593 WARN L233 ceAbstractionStarter]: 24 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:30:26,593 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 25 thread instances. [2023-09-01 09:30:26,765 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:30:26,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1453 places, 1603 transitions, 3931 flow [2023-09-01 09:30:27,690 INFO L130 PetriNetUnfolder]: 226/1901 cut-off events. [2023-09-01 09:30:27,690 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-09-01 09:30:27,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2302 conditions, 1901 events. 226/1901 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 8975 event pairs, 0 based on Foata normal form. 0/1624 useless extension candidates. Maximal degree in co-relation 2186. Up to 52 conditions per place. [2023-09-01 09:30:27,800 INFO L82 GeneralOperation]: Start removeDead. Operand has 1453 places, 1603 transitions, 3931 flow [2023-09-01 09:30:27,844 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1453 places, 1603 transitions, 3931 flow [2023-09-01 09:30:27,845 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:30:27,845 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1453 places, 1603 transitions, 3931 flow [2023-09-01 09:30:27,845 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1453 places, 1603 transitions, 3931 flow [2023-09-01 09:30:27,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1453 places, 1603 transitions, 3931 flow [2023-09-01 09:30:28,720 INFO L130 PetriNetUnfolder]: 226/1901 cut-off events. [2023-09-01 09:30:28,720 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-09-01 09:30:28,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2302 conditions, 1901 events. 226/1901 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 8975 event pairs, 0 based on Foata normal form. 0/1624 useless extension candidates. Maximal degree in co-relation 2186. Up to 52 conditions per place. [2023-09-01 09:30:29,190 INFO L119 LiptonReduction]: Number of co-enabled transitions 2383900 [2023-09-01 09:30:42,270 INFO L134 LiptonReduction]: Checked pairs total: 5066667 [2023-09-01 09:30:42,270 INFO L136 LiptonReduction]: Total number of compositions: 1277 [2023-09-01 09:30:42,272 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:30:42,272 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:30:42,272 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:30:42,403 INFO L130 PetriNetUnfolder]: 103/704 cut-off events. [2023-09-01 09:30:42,404 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-09-01 09:30:42,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:30:42,404 INFO L208 CegarLoopForPetriNet]: trace histogram [26, 25, 25, 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, 1] [2023-09-01 09:30:42,404 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:30:42,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:30:42,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1833648452, now seen corresponding path program 1 times [2023-09-01 09:30:42,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:30:42,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144516567] [2023-09-01 09:30:42,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:30:42,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:30:42,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:30:42,450 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:30:42,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:30:42,501 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:30:42,501 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:30:42,501 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:30:42,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-09-01 09:30:42,501 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:30:42,502 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:30:42,502 WARN L233 ceAbstractionStarter]: 25 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:30:42,502 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 26 thread instances. [2023-09-01 09:30:42,663 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:30:42,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1510 places, 1666 transitions, 4112 flow [2023-09-01 09:30:43,690 INFO L130 PetriNetUnfolder]: 235/1976 cut-off events. [2023-09-01 09:30:43,691 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-09-01 09:30:43,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2406 conditions, 1976 events. 235/1976 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 9363 event pairs, 0 based on Foata normal form. 0/1688 useless extension candidates. Maximal degree in co-relation 2289. Up to 54 conditions per place. [2023-09-01 09:30:43,801 INFO L82 GeneralOperation]: Start removeDead. Operand has 1510 places, 1666 transitions, 4112 flow [2023-09-01 09:30:43,844 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1510 places, 1666 transitions, 4112 flow [2023-09-01 09:30:43,844 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:30:43,844 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1510 places, 1666 transitions, 4112 flow [2023-09-01 09:30:43,845 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1510 places, 1666 transitions, 4112 flow [2023-09-01 09:30:43,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1510 places, 1666 transitions, 4112 flow [2023-09-01 09:30:44,872 INFO L130 PetriNetUnfolder]: 235/1976 cut-off events. [2023-09-01 09:30:44,872 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-09-01 09:30:44,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2406 conditions, 1976 events. 235/1976 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 9363 event pairs, 0 based on Foata normal form. 0/1688 useless extension candidates. Maximal degree in co-relation 2289. Up to 54 conditions per place. [2023-09-01 09:30:45,340 INFO L119 LiptonReduction]: Number of co-enabled transitions 2580812 [2023-09-01 09:30:59,184 INFO L134 LiptonReduction]: Checked pairs total: 5625808 [2023-09-01 09:30:59,184 INFO L136 LiptonReduction]: Total number of compositions: 1319 [2023-09-01 09:30:59,186 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:30:59,186 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:30:59,186 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:30:59,341 INFO L130 PetriNetUnfolder]: 114/753 cut-off events. [2023-09-01 09:30:59,341 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-09-01 09:30:59,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:30:59,341 INFO L208 CegarLoopForPetriNet]: trace histogram [27, 26, 26, 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, 1, 1] [2023-09-01 09:30:59,341 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:30:59,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:30:59,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1230829260, now seen corresponding path program 1 times [2023-09-01 09:30:59,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:30:59,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196010572] [2023-09-01 09:30:59,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:30:59,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:30:59,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:30:59,392 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:30:59,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:30:59,445 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:30:59,445 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:30:59,445 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:30:59,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-09-01 09:30:59,445 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:30:59,446 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:30:59,446 WARN L233 ceAbstractionStarter]: 26 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:30:59,446 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 27 thread instances. [2023-09-01 09:30:59,644 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:30:59,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1567 places, 1729 transitions, 4295 flow [2023-09-01 09:31:00,744 INFO L130 PetriNetUnfolder]: 244/2051 cut-off events. [2023-09-01 09:31:00,744 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-09-01 09:31:00,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2511 conditions, 2051 events. 244/2051 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 9772 event pairs, 0 based on Foata normal form. 0/1752 useless extension candidates. Maximal degree in co-relation 2393. Up to 56 conditions per place. [2023-09-01 09:31:00,844 INFO L82 GeneralOperation]: Start removeDead. Operand has 1567 places, 1729 transitions, 4295 flow [2023-09-01 09:31:00,881 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1567 places, 1729 transitions, 4295 flow [2023-09-01 09:31:00,881 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:31:00,881 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1567 places, 1729 transitions, 4295 flow [2023-09-01 09:31:00,881 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1567 places, 1729 transitions, 4295 flow [2023-09-01 09:31:00,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1567 places, 1729 transitions, 4295 flow [2023-09-01 09:31:02,074 INFO L130 PetriNetUnfolder]: 244/2051 cut-off events. [2023-09-01 09:31:02,074 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-09-01 09:31:02,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2511 conditions, 2051 events. 244/2051 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 9772 event pairs, 0 based on Foata normal form. 0/1752 useless extension candidates. Maximal degree in co-relation 2393. Up to 56 conditions per place. [2023-09-01 09:31:02,566 INFO L119 LiptonReduction]: Number of co-enabled transitions 2785536 [2023-09-01 09:31:17,925 INFO L134 LiptonReduction]: Checked pairs total: 6047258 [2023-09-01 09:31:17,926 INFO L136 LiptonReduction]: Total number of compositions: 1376 [2023-09-01 09:31:17,927 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:31:17,927 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:31:17,927 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:31:18,082 INFO L130 PetriNetUnfolder]: 118/777 cut-off events. [2023-09-01 09:31:18,083 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-09-01 09:31:18,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:31:18,083 INFO L208 CegarLoopForPetriNet]: trace histogram [28, 27, 27, 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, 1, 1, 1] [2023-09-01 09:31:18,083 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:31:18,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:31:18,083 INFO L85 PathProgramCache]: Analyzing trace with hash 299161815, now seen corresponding path program 1 times [2023-09-01 09:31:18,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:31:18,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841684821] [2023-09-01 09:31:18,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:31:18,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:31:18,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:31:18,128 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:31:18,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:31:18,177 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:31:18,177 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:31:18,177 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:31:18,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-09-01 09:31:18,177 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:31:18,178 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:31:18,178 WARN L233 ceAbstractionStarter]: 27 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:31:18,178 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 28 thread instances. [2023-09-01 09:31:18,418 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:31:18,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1624 places, 1792 transitions, 4480 flow [2023-09-01 09:31:19,586 INFO L130 PetriNetUnfolder]: 253/2126 cut-off events. [2023-09-01 09:31:19,587 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-09-01 09:31:19,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2617 conditions, 2126 events. 253/2126 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 10053 event pairs, 0 based on Foata normal form. 0/1816 useless extension candidates. Maximal degree in co-relation 2498. Up to 58 conditions per place. [2023-09-01 09:31:19,718 INFO L82 GeneralOperation]: Start removeDead. Operand has 1624 places, 1792 transitions, 4480 flow [2023-09-01 09:31:19,769 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1624 places, 1792 transitions, 4480 flow [2023-09-01 09:31:19,770 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:31:19,770 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1624 places, 1792 transitions, 4480 flow [2023-09-01 09:31:19,770 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1624 places, 1792 transitions, 4480 flow [2023-09-01 09:31:19,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1624 places, 1792 transitions, 4480 flow [2023-09-01 09:31:20,911 INFO L130 PetriNetUnfolder]: 253/2126 cut-off events. [2023-09-01 09:31:20,911 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-09-01 09:31:21,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2617 conditions, 2126 events. 253/2126 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 10053 event pairs, 0 based on Foata normal form. 0/1816 useless extension candidates. Maximal degree in co-relation 2498. Up to 58 conditions per place. [2023-09-01 09:31:21,954 INFO L119 LiptonReduction]: Number of co-enabled transitions 2998072 [2023-09-01 09:31:37,949 INFO L134 LiptonReduction]: Checked pairs total: 6551977 [2023-09-01 09:31:37,949 INFO L136 LiptonReduction]: Total number of compositions: 1431 [2023-09-01 09:31:37,951 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:31:37,951 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:31:37,951 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:31:38,121 INFO L130 PetriNetUnfolder]: 122/806 cut-off events. [2023-09-01 09:31:38,122 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-09-01 09:31:38,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:31:38,122 INFO L208 CegarLoopForPetriNet]: trace histogram [29, 28, 28, 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, 1, 1, 1, 1] [2023-09-01 09:31:38,122 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:31:38,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:31:38,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1332006675, now seen corresponding path program 1 times [2023-09-01 09:31:38,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:31:38,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741834599] [2023-09-01 09:31:38,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:31:38,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:31:38,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:31:38,190 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:31:38,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:31:38,244 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:31:38,245 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:31:38,245 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:31:38,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-09-01 09:31:38,245 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:31:38,246 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:31:38,246 WARN L233 ceAbstractionStarter]: 28 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:31:38,247 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 29 thread instances. [2023-09-01 09:31:38,411 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:31:38,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1681 places, 1855 transitions, 4667 flow [2023-09-01 09:31:39,916 INFO L130 PetriNetUnfolder]: 262/2201 cut-off events. [2023-09-01 09:31:39,916 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-09-01 09:31:40,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2724 conditions, 2201 events. 262/2201 cut-off events. For 4466/4466 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 10438 event pairs, 0 based on Foata normal form. 0/1880 useless extension candidates. Maximal degree in co-relation 2604. Up to 60 conditions per place. [2023-09-01 09:31:40,016 INFO L82 GeneralOperation]: Start removeDead. Operand has 1681 places, 1855 transitions, 4667 flow [2023-09-01 09:31:40,059 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1681 places, 1855 transitions, 4667 flow [2023-09-01 09:31:40,059 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:31:40,059 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1681 places, 1855 transitions, 4667 flow [2023-09-01 09:31:40,060 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1681 places, 1855 transitions, 4667 flow [2023-09-01 09:31:40,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1681 places, 1855 transitions, 4667 flow [2023-09-01 09:31:41,430 INFO L130 PetriNetUnfolder]: 262/2201 cut-off events. [2023-09-01 09:31:41,431 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-09-01 09:31:41,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2724 conditions, 2201 events. 262/2201 cut-off events. For 4466/4466 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 10438 event pairs, 0 based on Foata normal form. 0/1880 useless extension candidates. Maximal degree in co-relation 2604. Up to 60 conditions per place. [2023-09-01 09:31:42,182 INFO L119 LiptonReduction]: Number of co-enabled transitions 3218420 [2023-09-01 09:31:58,136 INFO L134 LiptonReduction]: Checked pairs total: 6841439 [2023-09-01 09:31:58,137 INFO L136 LiptonReduction]: Total number of compositions: 1469 [2023-09-01 09:31:58,138 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:31:58,139 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:31:58,139 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:31:58,395 INFO L130 PetriNetUnfolder]: 123/827 cut-off events. [2023-09-01 09:31:58,395 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-09-01 09:31:58,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:31:58,395 INFO L208 CegarLoopForPetriNet]: trace histogram [30, 29, 29, 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, 1, 1, 1, 1, 1] [2023-09-01 09:31:58,395 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:31:58,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:31:58,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1437393751, now seen corresponding path program 1 times [2023-09-01 09:31:58,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:31:58,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008683668] [2023-09-01 09:31:58,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:31:58,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:31:58,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:31:58,449 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:31:58,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:31:58,506 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:31:58,507 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:31:58,507 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:31:58,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-09-01 09:31:58,507 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:31:58,507 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:31:58,508 WARN L233 ceAbstractionStarter]: 29 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:31:58,508 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 30 thread instances. [2023-09-01 09:31:58,677 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:31:58,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1738 places, 1918 transitions, 4856 flow [2023-09-01 09:32:00,137 INFO L130 PetriNetUnfolder]: 271/2276 cut-off events. [2023-09-01 09:32:00,137 INFO L131 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2023-09-01 09:32:00,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2832 conditions, 2276 events. 271/2276 cut-off events. For 4930/4930 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 10819 event pairs, 0 based on Foata normal form. 0/1944 useless extension candidates. Maximal degree in co-relation 2711. Up to 62 conditions per place. [2023-09-01 09:32:00,245 INFO L82 GeneralOperation]: Start removeDead. Operand has 1738 places, 1918 transitions, 4856 flow [2023-09-01 09:32:00,304 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1738 places, 1918 transitions, 4856 flow [2023-09-01 09:32:00,305 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:32:00,305 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1738 places, 1918 transitions, 4856 flow [2023-09-01 09:32:00,305 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1738 places, 1918 transitions, 4856 flow [2023-09-01 09:32:00,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1738 places, 1918 transitions, 4856 flow [2023-09-01 09:32:01,764 INFO L130 PetriNetUnfolder]: 271/2276 cut-off events. [2023-09-01 09:32:01,764 INFO L131 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2023-09-01 09:32:01,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2832 conditions, 2276 events. 271/2276 cut-off events. For 4930/4930 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 10819 event pairs, 0 based on Foata normal form. 0/1944 useless extension candidates. Maximal degree in co-relation 2711. Up to 62 conditions per place. [2023-09-01 09:32:02,523 INFO L119 LiptonReduction]: Number of co-enabled transitions 3446580 [2023-09-01 09:32:19,299 INFO L134 LiptonReduction]: Checked pairs total: 7413504 [2023-09-01 09:32:19,299 INFO L136 LiptonReduction]: Total number of compositions: 1505 [2023-09-01 09:32:19,301 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:32:19,301 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:32:19,301 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:32:19,537 INFO L130 PetriNetUnfolder]: 126/855 cut-off events. [2023-09-01 09:32:19,537 INFO L131 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2023-09-01 09:32:19,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:32:19,537 INFO L208 CegarLoopForPetriNet]: trace histogram [31, 30, 30, 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, 1, 1, 1, 1, 1, 1] [2023-09-01 09:32:19,537 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:32:19,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:32:19,537 INFO L85 PathProgramCache]: Analyzing trace with hash -797141172, now seen corresponding path program 1 times [2023-09-01 09:32:19,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:32:19,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449266490] [2023-09-01 09:32:19,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:32:19,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:32:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:32:19,592 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:32:19,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:32:19,648 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:32:19,649 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:32:19,649 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:32:19,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-09-01 09:32:19,649 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:32:19,650 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:32:19,650 WARN L233 ceAbstractionStarter]: 30 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:32:19,650 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 31 thread instances. [2023-09-01 09:32:19,832 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:32:19,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1795 places, 1981 transitions, 5047 flow [2023-09-01 09:32:21,514 INFO L130 PetriNetUnfolder]: 280/2351 cut-off events. [2023-09-01 09:32:21,515 INFO L131 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2023-09-01 09:32:21,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2941 conditions, 2351 events. 280/2351 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 11119 event pairs, 0 based on Foata normal form. 0/2008 useless extension candidates. Maximal degree in co-relation 2819. Up to 64 conditions per place. [2023-09-01 09:32:21,628 INFO L82 GeneralOperation]: Start removeDead. Operand has 1795 places, 1981 transitions, 5047 flow [2023-09-01 09:32:21,683 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1795 places, 1981 transitions, 5047 flow [2023-09-01 09:32:21,683 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:32:21,683 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1795 places, 1981 transitions, 5047 flow [2023-09-01 09:32:21,683 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1795 places, 1981 transitions, 5047 flow [2023-09-01 09:32:21,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1795 places, 1981 transitions, 5047 flow [2023-09-01 09:32:23,314 INFO L130 PetriNetUnfolder]: 280/2351 cut-off events. [2023-09-01 09:32:23,315 INFO L131 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2023-09-01 09:32:23,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2941 conditions, 2351 events. 280/2351 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 11119 event pairs, 0 based on Foata normal form. 0/2008 useless extension candidates. Maximal degree in co-relation 2819. Up to 64 conditions per place. [2023-09-01 09:32:24,133 INFO L119 LiptonReduction]: Number of co-enabled transitions 3682552 [2023-09-01 09:32:42,223 INFO L134 LiptonReduction]: Checked pairs total: 7882226 [2023-09-01 09:32:42,224 INFO L136 LiptonReduction]: Total number of compositions: 1563 [2023-09-01 09:32:42,225 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:32:42,225 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:32:42,225 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:32:42,429 INFO L130 PetriNetUnfolder]: 134/892 cut-off events. [2023-09-01 09:32:42,429 INFO L131 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2023-09-01 09:32:42,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:32:42,430 INFO L208 CegarLoopForPetriNet]: trace histogram [32, 31, 31, 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, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:32:42,430 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:32:42,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:32:42,430 INFO L85 PathProgramCache]: Analyzing trace with hash 291964691, now seen corresponding path program 1 times [2023-09-01 09:32:42,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:32:42,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042232106] [2023-09-01 09:32:42,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:32:42,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:32:42,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:32:42,489 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:32:42,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:32:42,554 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:32:42,554 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:32:42,554 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:32:42,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-09-01 09:32:42,555 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:32:42,555 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:32:42,555 WARN L233 ceAbstractionStarter]: 31 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:32:42,555 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 32 thread instances. [2023-09-01 09:32:42,753 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:32:42,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1852 places, 2044 transitions, 5240 flow [2023-09-01 09:32:44,499 INFO L130 PetriNetUnfolder]: 289/2426 cut-off events. [2023-09-01 09:32:44,499 INFO L131 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2023-09-01 09:32:44,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3051 conditions, 2426 events. 289/2426 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 11516 event pairs, 0 based on Foata normal form. 0/2072 useless extension candidates. Maximal degree in co-relation 2928. Up to 66 conditions per place. [2023-09-01 09:32:44,674 INFO L82 GeneralOperation]: Start removeDead. Operand has 1852 places, 2044 transitions, 5240 flow [2023-09-01 09:32:44,766 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1852 places, 2044 transitions, 5240 flow [2023-09-01 09:32:44,766 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:32:44,766 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1852 places, 2044 transitions, 5240 flow [2023-09-01 09:32:44,767 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1852 places, 2044 transitions, 5240 flow [2023-09-01 09:32:44,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1852 places, 2044 transitions, 5240 flow [2023-09-01 09:32:47,477 INFO L130 PetriNetUnfolder]: 289/2426 cut-off events. [2023-09-01 09:32:47,477 INFO L131 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2023-09-01 09:32:47,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3051 conditions, 2426 events. 289/2426 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 11516 event pairs, 0 based on Foata normal form. 0/2072 useless extension candidates. Maximal degree in co-relation 2928. Up to 66 conditions per place. [2023-09-01 09:32:48,361 INFO L119 LiptonReduction]: Number of co-enabled transitions 3926336 [2023-09-01 09:33:07,509 INFO L134 LiptonReduction]: Checked pairs total: 8328060 [2023-09-01 09:33:07,510 INFO L136 LiptonReduction]: Total number of compositions: 1616 [2023-09-01 09:33:07,511 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:33:07,512 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:33:07,512 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:33:07,737 INFO L130 PetriNetUnfolder]: 139/923 cut-off events. [2023-09-01 09:33:07,737 INFO L131 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2023-09-01 09:33:07,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:33:07,738 INFO L208 CegarLoopForPetriNet]: trace histogram [33, 32, 32, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:33:07,738 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:33:07,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:33:07,738 INFO L85 PathProgramCache]: Analyzing trace with hash 639229301, now seen corresponding path program 1 times [2023-09-01 09:33:07,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:33:07,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539867917] [2023-09-01 09:33:07,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:33:07,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:33:07,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:33:07,793 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:33:07,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:33:07,856 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:33:07,857 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:33:07,857 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:33:07,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-09-01 09:33:07,857 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:33:07,858 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:33:07,858 WARN L233 ceAbstractionStarter]: 32 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:33:07,858 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 33 thread instances. [2023-09-01 09:33:08,044 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:33:08,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1909 places, 2107 transitions, 5435 flow [2023-09-01 09:33:10,082 INFO L130 PetriNetUnfolder]: 298/2501 cut-off events. [2023-09-01 09:33:10,082 INFO L131 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2023-09-01 09:33:10,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3162 conditions, 2501 events. 298/2501 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 11896 event pairs, 0 based on Foata normal form. 0/2136 useless extension candidates. Maximal degree in co-relation 3038. Up to 68 conditions per place. [2023-09-01 09:33:10,213 INFO L82 GeneralOperation]: Start removeDead. Operand has 1909 places, 2107 transitions, 5435 flow [2023-09-01 09:33:10,254 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1909 places, 2107 transitions, 5435 flow [2023-09-01 09:33:10,255 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:33:10,255 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1909 places, 2107 transitions, 5435 flow [2023-09-01 09:33:10,255 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1909 places, 2107 transitions, 5435 flow [2023-09-01 09:33:10,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1909 places, 2107 transitions, 5435 flow [2023-09-01 09:33:11,987 INFO L130 PetriNetUnfolder]: 298/2501 cut-off events. [2023-09-01 09:33:11,987 INFO L131 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2023-09-01 09:33:12,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3162 conditions, 2501 events. 298/2501 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 11896 event pairs, 0 based on Foata normal form. 0/2136 useless extension candidates. Maximal degree in co-relation 3038. Up to 68 conditions per place. [2023-09-01 09:33:12,908 INFO L119 LiptonReduction]: Number of co-enabled transitions 4177932 [2023-09-01 09:33:32,102 INFO L134 LiptonReduction]: Checked pairs total: 8834959 [2023-09-01 09:33:32,102 INFO L136 LiptonReduction]: Total number of compositions: 1670 [2023-09-01 09:33:32,104 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:33:32,105 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:33:32,105 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:33:32,346 INFO L130 PetriNetUnfolder]: 143/949 cut-off events. [2023-09-01 09:33:32,346 INFO L131 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2023-09-01 09:33:32,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:33:32,346 INFO L208 CegarLoopForPetriNet]: trace histogram [34, 33, 33, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:33:32,347 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:33:32,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:33:32,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1609482391, now seen corresponding path program 1 times [2023-09-01 09:33:32,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:33:32,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23727011] [2023-09-01 09:33:32,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:33:32,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:33:32,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:33:32,417 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:33:32,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:33:32,488 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:33:32,488 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:33:32,489 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:33:32,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-09-01 09:33:32,489 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:33:32,489 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:33:32,489 WARN L233 ceAbstractionStarter]: 33 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:33:32,489 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 34 thread instances. [2023-09-01 09:33:32,701 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:33:32,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1966 places, 2170 transitions, 5632 flow [2023-09-01 09:33:34,692 INFO L130 PetriNetUnfolder]: 307/2576 cut-off events. [2023-09-01 09:33:34,692 INFO L131 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2023-09-01 09:33:34,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3274 conditions, 2576 events. 307/2576 cut-off events. For 7106/7106 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 12301 event pairs, 0 based on Foata normal form. 0/2200 useless extension candidates. Maximal degree in co-relation 3149. Up to 70 conditions per place. [2023-09-01 09:33:34,838 INFO L82 GeneralOperation]: Start removeDead. Operand has 1966 places, 2170 transitions, 5632 flow [2023-09-01 09:33:34,886 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1966 places, 2170 transitions, 5632 flow [2023-09-01 09:33:34,886 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:33:34,886 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1966 places, 2170 transitions, 5632 flow [2023-09-01 09:33:34,886 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1966 places, 2170 transitions, 5632 flow [2023-09-01 09:33:34,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1966 places, 2170 transitions, 5632 flow [2023-09-01 09:33:36,812 INFO L130 PetriNetUnfolder]: 307/2576 cut-off events. [2023-09-01 09:33:36,812 INFO L131 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2023-09-01 09:33:36,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3274 conditions, 2576 events. 307/2576 cut-off events. For 7106/7106 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 12301 event pairs, 0 based on Foata normal form. 0/2200 useless extension candidates. Maximal degree in co-relation 3149. Up to 70 conditions per place. [2023-09-01 09:33:37,770 INFO L119 LiptonReduction]: Number of co-enabled transitions 4437340 [2023-09-01 09:33:58,447 INFO L134 LiptonReduction]: Checked pairs total: 9480268 [2023-09-01 09:33:58,447 INFO L136 LiptonReduction]: Total number of compositions: 1724 [2023-09-01 09:33:58,449 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:33:58,449 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:33:58,449 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:33:58,709 INFO L130 PetriNetUnfolder]: 145/973 cut-off events. [2023-09-01 09:33:58,709 INFO L131 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2023-09-01 09:33:58,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:33:58,709 INFO L208 CegarLoopForPetriNet]: trace histogram [35, 34, 34, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:33:58,709 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:33:58,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:33:58,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1413739277, now seen corresponding path program 1 times [2023-09-01 09:33:58,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:33:58,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763299127] [2023-09-01 09:33:58,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:33:58,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:33:58,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:33:58,774 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:33:58,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:33:58,846 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:33:58,846 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:33:58,846 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:33:58,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-09-01 09:33:58,847 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:33:58,847 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:33:58,847 WARN L233 ceAbstractionStarter]: 34 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:33:58,847 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 35 thread instances. [2023-09-01 09:33:59,131 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:33:59,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2023 places, 2233 transitions, 5831 flow [2023-09-01 09:34:01,402 INFO L130 PetriNetUnfolder]: 316/2651 cut-off events. [2023-09-01 09:34:01,402 INFO L131 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2023-09-01 09:34:01,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3387 conditions, 2651 events. 316/2651 cut-off events. For 7735/7735 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 12670 event pairs, 0 based on Foata normal form. 0/2264 useless extension candidates. Maximal degree in co-relation 3261. Up to 72 conditions per place. [2023-09-01 09:34:01,553 INFO L82 GeneralOperation]: Start removeDead. Operand has 2023 places, 2233 transitions, 5831 flow [2023-09-01 09:34:01,597 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2023 places, 2233 transitions, 5831 flow [2023-09-01 09:34:01,597 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:34:01,597 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2023 places, 2233 transitions, 5831 flow [2023-09-01 09:34:01,597 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2023 places, 2233 transitions, 5831 flow [2023-09-01 09:34:01,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2023 places, 2233 transitions, 5831 flow [2023-09-01 09:34:03,655 INFO L130 PetriNetUnfolder]: 316/2651 cut-off events. [2023-09-01 09:34:03,655 INFO L131 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2023-09-01 09:34:03,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3387 conditions, 2651 events. 316/2651 cut-off events. For 7735/7735 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 12670 event pairs, 0 based on Foata normal form. 0/2264 useless extension candidates. Maximal degree in co-relation 3261. Up to 72 conditions per place. [2023-09-01 09:34:04,718 INFO L119 LiptonReduction]: Number of co-enabled transitions 4704560 [2023-09-01 09:34:26,795 INFO L134 LiptonReduction]: Checked pairs total: 10199493 [2023-09-01 09:34:26,795 INFO L136 LiptonReduction]: Total number of compositions: 1769 [2023-09-01 09:34:26,796 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:34:26,797 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:34:26,797 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:34:27,140 INFO L130 PetriNetUnfolder]: 151/1006 cut-off events. [2023-09-01 09:34:27,140 INFO L131 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2023-09-01 09:34:27,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:34:27,141 INFO L208 CegarLoopForPetriNet]: trace histogram [36, 35, 35, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:34:27,141 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:34:27,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:34:27,141 INFO L85 PathProgramCache]: Analyzing trace with hash 836937154, now seen corresponding path program 1 times [2023-09-01 09:34:27,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:34:27,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146946630] [2023-09-01 09:34:27,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:34:27,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:34:27,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:34:27,215 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:34:27,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:34:27,287 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:34:27,288 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:34:27,288 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:34:27,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-09-01 09:34:27,288 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:34:27,289 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:34:27,289 WARN L233 ceAbstractionStarter]: 35 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:34:27,289 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 36 thread instances. [2023-09-01 09:34:27,477 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:34:27,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2080 places, 2296 transitions, 6032 flow [2023-09-01 09:34:29,561 INFO L130 PetriNetUnfolder]: 325/2726 cut-off events. [2023-09-01 09:34:29,562 INFO L131 PetriNetUnfolder]: For 8400/8400 co-relation queries the response was YES. [2023-09-01 09:34:29,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3501 conditions, 2726 events. 325/2726 cut-off events. For 8400/8400 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 12996 event pairs, 0 based on Foata normal form. 0/2328 useless extension candidates. Maximal degree in co-relation 3374. Up to 74 conditions per place. [2023-09-01 09:34:29,727 INFO L82 GeneralOperation]: Start removeDead. Operand has 2080 places, 2296 transitions, 6032 flow [2023-09-01 09:34:29,785 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2080 places, 2296 transitions, 6032 flow [2023-09-01 09:34:29,785 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:34:29,785 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2080 places, 2296 transitions, 6032 flow [2023-09-01 09:34:29,786 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2080 places, 2296 transitions, 6032 flow [2023-09-01 09:34:29,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2080 places, 2296 transitions, 6032 flow [2023-09-01 09:34:32,735 INFO L130 PetriNetUnfolder]: 325/2726 cut-off events. [2023-09-01 09:34:32,735 INFO L131 PetriNetUnfolder]: For 8400/8400 co-relation queries the response was YES. [2023-09-01 09:34:32,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3501 conditions, 2726 events. 325/2726 cut-off events. For 8400/8400 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 12996 event pairs, 0 based on Foata normal form. 0/2328 useless extension candidates. Maximal degree in co-relation 3374. Up to 74 conditions per place. [2023-09-01 09:34:34,178 INFO L119 LiptonReduction]: Number of co-enabled transitions 4979592 [2023-09-01 09:34:56,131 INFO L134 LiptonReduction]: Checked pairs total: 10597483 [2023-09-01 09:34:56,131 INFO L136 LiptonReduction]: Total number of compositions: 1803 [2023-09-01 09:34:56,132 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:34:56,132 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:34:56,132 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:34:56,488 INFO L130 PetriNetUnfolder]: 153/1040 cut-off events. [2023-09-01 09:34:56,488 INFO L131 PetriNetUnfolder]: For 8400/8400 co-relation queries the response was YES. [2023-09-01 09:34:56,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:34:56,488 INFO L208 CegarLoopForPetriNet]: trace histogram [37, 36, 36, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:34:56,488 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:34:56,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:34:56,489 INFO L85 PathProgramCache]: Analyzing trace with hash -563754587, now seen corresponding path program 1 times [2023-09-01 09:34:56,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:34:56,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630166516] [2023-09-01 09:34:56,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:34:56,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:34:56,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:34:56,562 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:34:56,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:34:56,637 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:34:56,637 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:34:56,637 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:34:56,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-09-01 09:34:56,638 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:34:56,638 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:34:56,638 WARN L233 ceAbstractionStarter]: 36 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:34:56,638 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 37 thread instances. [2023-09-01 09:34:56,888 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:34:56,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2137 places, 2359 transitions, 6235 flow [2023-09-01 09:34:59,168 INFO L130 PetriNetUnfolder]: 334/2801 cut-off events. [2023-09-01 09:34:59,169 INFO L131 PetriNetUnfolder]: For 9102/9102 co-relation queries the response was YES. [2023-09-01 09:34:59,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3616 conditions, 2801 events. 334/2801 cut-off events. For 9102/9102 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 13406 event pairs, 0 based on Foata normal form. 0/2392 useless extension candidates. Maximal degree in co-relation 3488. Up to 76 conditions per place. [2023-09-01 09:34:59,343 INFO L82 GeneralOperation]: Start removeDead. Operand has 2137 places, 2359 transitions, 6235 flow [2023-09-01 09:34:59,397 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2137 places, 2359 transitions, 6235 flow [2023-09-01 09:34:59,397 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:34:59,398 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2137 places, 2359 transitions, 6235 flow [2023-09-01 09:34:59,398 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2137 places, 2359 transitions, 6235 flow [2023-09-01 09:34:59,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2137 places, 2359 transitions, 6235 flow [2023-09-01 09:35:01,669 INFO L130 PetriNetUnfolder]: 334/2801 cut-off events. [2023-09-01 09:35:01,669 INFO L131 PetriNetUnfolder]: For 9102/9102 co-relation queries the response was YES. [2023-09-01 09:35:01,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3616 conditions, 2801 events. 334/2801 cut-off events. For 9102/9102 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 13406 event pairs, 0 based on Foata normal form. 0/2392 useless extension candidates. Maximal degree in co-relation 3488. Up to 76 conditions per place. [2023-09-01 09:35:02,789 INFO L119 LiptonReduction]: Number of co-enabled transitions 5262436 [2023-09-01 09:35:26,994 INFO L134 LiptonReduction]: Checked pairs total: 11293475 [2023-09-01 09:35:26,994 INFO L136 LiptonReduction]: Total number of compositions: 1881 [2023-09-01 09:35:26,996 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:35:26,996 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:35:26,996 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:35:27,399 INFO L130 PetriNetUnfolder]: 162/1061 cut-off events. [2023-09-01 09:35:27,399 INFO L131 PetriNetUnfolder]: For 9102/9102 co-relation queries the response was YES. [2023-09-01 09:35:27,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:35:27,399 INFO L208 CegarLoopForPetriNet]: trace histogram [38, 37, 37, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:35:27,399 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:35:27,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:35:27,400 INFO L85 PathProgramCache]: Analyzing trace with hash -2126582502, now seen corresponding path program 1 times [2023-09-01 09:35:27,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:35:27,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195494782] [2023-09-01 09:35:27,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:35:27,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:35:27,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:35:27,479 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:35:27,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:35:27,565 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:35:27,566 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:35:27,567 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:35:27,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-09-01 09:35:27,567 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:35:27,568 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:35:27,568 WARN L233 ceAbstractionStarter]: 37 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:35:27,568 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 38 thread instances. [2023-09-01 09:35:27,795 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:35:27,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2194 places, 2422 transitions, 6440 flow [2023-09-01 09:35:30,089 INFO L130 PetriNetUnfolder]: 343/2876 cut-off events. [2023-09-01 09:35:30,090 INFO L131 PetriNetUnfolder]: For 9842/9842 co-relation queries the response was YES. [2023-09-01 09:35:30,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3732 conditions, 2876 events. 343/2876 cut-off events. For 9842/9842 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 13743 event pairs, 0 based on Foata normal form. 0/2456 useless extension candidates. Maximal degree in co-relation 3603. Up to 78 conditions per place. [2023-09-01 09:35:30,283 INFO L82 GeneralOperation]: Start removeDead. Operand has 2194 places, 2422 transitions, 6440 flow [2023-09-01 09:35:30,342 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2194 places, 2422 transitions, 6440 flow [2023-09-01 09:35:30,343 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:35:30,343 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2194 places, 2422 transitions, 6440 flow [2023-09-01 09:35:30,343 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2194 places, 2422 transitions, 6440 flow [2023-09-01 09:35:30,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2194 places, 2422 transitions, 6440 flow [2023-09-01 09:35:32,657 INFO L130 PetriNetUnfolder]: 343/2876 cut-off events. [2023-09-01 09:35:32,657 INFO L131 PetriNetUnfolder]: For 9842/9842 co-relation queries the response was YES. [2023-09-01 09:35:32,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3732 conditions, 2876 events. 343/2876 cut-off events. For 9842/9842 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 13743 event pairs, 0 based on Foata normal form. 0/2456 useless extension candidates. Maximal degree in co-relation 3603. Up to 78 conditions per place. [2023-09-01 09:35:34,084 INFO L119 LiptonReduction]: Number of co-enabled transitions 5553092 [2023-09-01 09:35:58,303 INFO L134 LiptonReduction]: Checked pairs total: 12006321 [2023-09-01 09:35:58,303 INFO L136 LiptonReduction]: Total number of compositions: 1909 [2023-09-01 09:35:58,305 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:35:58,305 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:35:58,305 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:35:58,649 INFO L130 PetriNetUnfolder]: 165/1106 cut-off events. [2023-09-01 09:35:58,649 INFO L131 PetriNetUnfolder]: For 9842/9842 co-relation queries the response was YES. [2023-09-01 09:35:58,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:35:58,649 INFO L208 CegarLoopForPetriNet]: trace histogram [39, 38, 38, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:35:58,649 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:35:58,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:35:58,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1334897437, now seen corresponding path program 1 times [2023-09-01 09:35:58,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:35:58,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629295052] [2023-09-01 09:35:58,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:35:58,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:35:58,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:35:58,723 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:35:58,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:35:58,805 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:35:58,806 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:35:58,806 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:35:58,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-09-01 09:35:58,806 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:35:58,807 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:35:58,807 WARN L233 ceAbstractionStarter]: 38 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:35:58,807 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 39 thread instances. [2023-09-01 09:35:59,033 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:35:59,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2251 places, 2485 transitions, 6647 flow [2023-09-01 09:36:01,484 INFO L130 PetriNetUnfolder]: 352/2951 cut-off events. [2023-09-01 09:36:01,484 INFO L131 PetriNetUnfolder]: For 10621/10621 co-relation queries the response was YES. [2023-09-01 09:36:01,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3849 conditions, 2951 events. 352/2951 cut-off events. For 10621/10621 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 14144 event pairs, 0 based on Foata normal form. 0/2520 useless extension candidates. Maximal degree in co-relation 3719. Up to 80 conditions per place. [2023-09-01 09:36:01,687 INFO L82 GeneralOperation]: Start removeDead. Operand has 2251 places, 2485 transitions, 6647 flow [2023-09-01 09:36:01,926 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2251 places, 2485 transitions, 6647 flow [2023-09-01 09:36:01,926 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:36:01,926 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2251 places, 2485 transitions, 6647 flow [2023-09-01 09:36:01,926 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2251 places, 2485 transitions, 6647 flow [2023-09-01 09:36:01,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2251 places, 2485 transitions, 6647 flow [2023-09-01 09:36:04,501 INFO L130 PetriNetUnfolder]: 352/2951 cut-off events. [2023-09-01 09:36:04,502 INFO L131 PetriNetUnfolder]: For 10621/10621 co-relation queries the response was YES. [2023-09-01 09:36:04,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3849 conditions, 2951 events. 352/2951 cut-off events. For 10621/10621 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 14144 event pairs, 0 based on Foata normal form. 0/2520 useless extension candidates. Maximal degree in co-relation 3719. Up to 80 conditions per place. [2023-09-01 09:36:05,788 INFO L119 LiptonReduction]: Number of co-enabled transitions 5851560 [2023-09-01 09:36:31,901 INFO L134 LiptonReduction]: Checked pairs total: 12510362 [2023-09-01 09:36:31,901 INFO L136 LiptonReduction]: Total number of compositions: 1947 [2023-09-01 09:36:31,904 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:36:31,906 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:36:31,906 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:36:32,523 INFO L130 PetriNetUnfolder]: 168/1129 cut-off events. [2023-09-01 09:36:32,524 INFO L131 PetriNetUnfolder]: For 10621/10621 co-relation queries the response was YES. [2023-09-01 09:36:32,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:36:32,524 INFO L208 CegarLoopForPetriNet]: trace histogram [40, 39, 39, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:36:32,524 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:36:32,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:36:32,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1078599162, now seen corresponding path program 1 times [2023-09-01 09:36:32,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:36:32,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496618329] [2023-09-01 09:36:32,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:36:32,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:36:32,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:36:32,637 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:36:32,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:36:32,811 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:36:32,811 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:36:32,811 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:36:32,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-09-01 09:36:32,812 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:36:32,812 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:36:32,813 WARN L233 ceAbstractionStarter]: 39 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:36:32,813 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 40 thread instances. [2023-09-01 09:36:33,277 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:36:33,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2308 places, 2548 transitions, 6856 flow [2023-09-01 09:36:36,451 INFO L130 PetriNetUnfolder]: 361/3026 cut-off events. [2023-09-01 09:36:36,452 INFO L131 PetriNetUnfolder]: For 11440/11440 co-relation queries the response was YES. [2023-09-01 09:36:36,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3967 conditions, 3026 events. 361/3026 cut-off events. For 11440/11440 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 14471 event pairs, 0 based on Foata normal form. 0/2584 useless extension candidates. Maximal degree in co-relation 3836. Up to 82 conditions per place. [2023-09-01 09:36:36,651 INFO L82 GeneralOperation]: Start removeDead. Operand has 2308 places, 2548 transitions, 6856 flow [2023-09-01 09:36:36,710 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2308 places, 2548 transitions, 6856 flow [2023-09-01 09:36:36,710 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:36:36,710 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2308 places, 2548 transitions, 6856 flow [2023-09-01 09:36:36,710 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2308 places, 2548 transitions, 6856 flow [2023-09-01 09:36:36,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2308 places, 2548 transitions, 6856 flow [2023-09-01 09:36:39,403 INFO L130 PetriNetUnfolder]: 361/3026 cut-off events. [2023-09-01 09:36:39,403 INFO L131 PetriNetUnfolder]: For 11440/11440 co-relation queries the response was YES. [2023-09-01 09:36:39,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3967 conditions, 3026 events. 361/3026 cut-off events. For 11440/11440 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 14471 event pairs, 0 based on Foata normal form. 0/2584 useless extension candidates. Maximal degree in co-relation 3836. Up to 82 conditions per place. [2023-09-01 09:36:40,760 INFO L119 LiptonReduction]: Number of co-enabled transitions 6157840 [2023-09-01 09:37:06,736 INFO L134 LiptonReduction]: Checked pairs total: 13048176 [2023-09-01 09:37:06,736 INFO L136 LiptonReduction]: Total number of compositions: 2051 [2023-09-01 09:37:06,738 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:37:06,738 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:37:06,738 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:37:07,254 INFO L130 PetriNetUnfolder]: 179/1152 cut-off events. [2023-09-01 09:37:07,254 INFO L131 PetriNetUnfolder]: For 11440/11440 co-relation queries the response was YES. [2023-09-01 09:37:07,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:37:07,255 INFO L208 CegarLoopForPetriNet]: trace histogram [41, 40, 40, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:37:07,255 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:37:07,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:37:07,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1090438301, now seen corresponding path program 1 times [2023-09-01 09:37:07,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:37:07,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623899599] [2023-09-01 09:37:07,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:37:07,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:37:07,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:37:07,359 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:37:07,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:37:07,448 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:37:07,448 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:37:07,448 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:37:07,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-09-01 09:37:07,449 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:37:07,449 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:37:07,449 WARN L233 ceAbstractionStarter]: 40 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:37:07,449 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 41 thread instances. [2023-09-01 09:37:07,712 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:37:07,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2365 places, 2611 transitions, 7067 flow [2023-09-01 09:37:10,469 INFO L130 PetriNetUnfolder]: 370/3101 cut-off events. [2023-09-01 09:37:10,469 INFO L131 PetriNetUnfolder]: For 12300/12300 co-relation queries the response was YES. [2023-09-01 09:37:10,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4086 conditions, 3101 events. 370/3101 cut-off events. For 12300/12300 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 14872 event pairs, 0 based on Foata normal form. 0/2648 useless extension candidates. Maximal degree in co-relation 3954. Up to 84 conditions per place. [2023-09-01 09:37:10,689 INFO L82 GeneralOperation]: Start removeDead. Operand has 2365 places, 2611 transitions, 7067 flow [2023-09-01 09:37:10,759 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2365 places, 2611 transitions, 7067 flow [2023-09-01 09:37:10,760 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:37:10,760 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2365 places, 2611 transitions, 7067 flow [2023-09-01 09:37:10,760 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2365 places, 2611 transitions, 7067 flow [2023-09-01 09:37:10,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2365 places, 2611 transitions, 7067 flow [2023-09-01 09:37:13,761 INFO L130 PetriNetUnfolder]: 370/3101 cut-off events. [2023-09-01 09:37:13,761 INFO L131 PetriNetUnfolder]: For 12300/12300 co-relation queries the response was YES. [2023-09-01 09:37:13,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4086 conditions, 3101 events. 370/3101 cut-off events. For 12300/12300 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 14872 event pairs, 0 based on Foata normal form. 0/2648 useless extension candidates. Maximal degree in co-relation 3954. Up to 84 conditions per place. [2023-09-01 09:37:15,165 INFO L119 LiptonReduction]: Number of co-enabled transitions 6471932 [2023-09-01 09:37:43,329 INFO L134 LiptonReduction]: Checked pairs total: 13928867 [2023-09-01 09:37:43,329 INFO L136 LiptonReduction]: Total number of compositions: 2060 [2023-09-01 09:37:43,330 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:37:43,331 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:37:43,331 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:37:43,867 INFO L130 PetriNetUnfolder]: 182/1197 cut-off events. [2023-09-01 09:37:43,867 INFO L131 PetriNetUnfolder]: For 12300/12300 co-relation queries the response was YES. [2023-09-01 09:37:43,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:37:43,867 INFO L208 CegarLoopForPetriNet]: trace histogram [42, 41, 41, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:37:43,867 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:37:43,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:37:43,868 INFO L85 PathProgramCache]: Analyzing trace with hash -275774233, now seen corresponding path program 1 times [2023-09-01 09:37:43,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:37:43,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731848024] [2023-09-01 09:37:43,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:37:43,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:37:43,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:37:43,968 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:37:43,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:37:44,059 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:37:44,059 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:37:44,059 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:37:44,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-09-01 09:37:44,060 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:37:44,060 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:37:44,060 WARN L233 ceAbstractionStarter]: 41 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:37:44,060 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 42 thread instances. [2023-09-01 09:37:44,295 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:37:44,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2422 places, 2674 transitions, 7280 flow [2023-09-01 09:37:47,428 INFO L130 PetriNetUnfolder]: 379/3176 cut-off events. [2023-09-01 09:37:47,428 INFO L131 PetriNetUnfolder]: For 13202/13202 co-relation queries the response was YES. [2023-09-01 09:37:47,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4206 conditions, 3176 events. 379/3176 cut-off events. For 13202/13202 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 15265 event pairs, 0 based on Foata normal form. 0/2712 useless extension candidates. Maximal degree in co-relation 4073. Up to 86 conditions per place. [2023-09-01 09:37:47,648 INFO L82 GeneralOperation]: Start removeDead. Operand has 2422 places, 2674 transitions, 7280 flow [2023-09-01 09:37:47,712 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2422 places, 2674 transitions, 7280 flow [2023-09-01 09:37:47,713 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:37:47,713 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2422 places, 2674 transitions, 7280 flow [2023-09-01 09:37:47,713 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2422 places, 2674 transitions, 7280 flow [2023-09-01 09:37:47,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2422 places, 2674 transitions, 7280 flow [2023-09-01 09:37:50,950 INFO L130 PetriNetUnfolder]: 379/3176 cut-off events. [2023-09-01 09:37:50,951 INFO L131 PetriNetUnfolder]: For 13202/13202 co-relation queries the response was YES. [2023-09-01 09:37:51,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4206 conditions, 3176 events. 379/3176 cut-off events. For 13202/13202 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 15265 event pairs, 0 based on Foata normal form. 0/2712 useless extension candidates. Maximal degree in co-relation 4073. Up to 86 conditions per place. [2023-09-01 09:37:52,415 INFO L119 LiptonReduction]: Number of co-enabled transitions 6793836 [2023-09-01 09:38:21,989 INFO L134 LiptonReduction]: Checked pairs total: 14291282 [2023-09-01 09:38:21,990 INFO L136 LiptonReduction]: Total number of compositions: 2108 [2023-09-01 09:38:21,991 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:38:21,992 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;@5599796e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:38:21,992 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:38:22,542 INFO L130 PetriNetUnfolder]: 179/1206 cut-off events. [2023-09-01 09:38:22,542 INFO L131 PetriNetUnfolder]: For 13202/13202 co-relation queries the response was YES. [2023-09-01 09:38:22,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:38:22,542 INFO L208 CegarLoopForPetriNet]: trace histogram [43, 42, 42, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:38:22,543 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:38:22,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:38:22,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1189822175, now seen corresponding path program 1 times [2023-09-01 09:38:22,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:38:22,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754402444] [2023-09-01 09:38:22,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:38:22,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:38:22,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:38:22,647 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:38:22,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:38:22,772 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:38:22,772 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:38:22,772 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:38:22,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-09-01 09:38:22,773 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:38:22,773 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:38:22,773 WARN L233 ceAbstractionStarter]: 42 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:38:22,773 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 43 thread instances. [2023-09-01 09:38:23,011 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:38:23,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2479 places, 2737 transitions, 7495 flow [2023-09-01 09:38:26,213 INFO L130 PetriNetUnfolder]: 388/3251 cut-off events. [2023-09-01 09:38:26,213 INFO L131 PetriNetUnfolder]: For 14147/14147 co-relation queries the response was YES. [2023-09-01 09:38:26,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4327 conditions, 3251 events. 388/3251 cut-off events. For 14147/14147 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 15653 event pairs, 0 based on Foata normal form. 0/2776 useless extension candidates. Maximal degree in co-relation 4193. Up to 88 conditions per place. [2023-09-01 09:38:26,476 INFO L82 GeneralOperation]: Start removeDead. Operand has 2479 places, 2737 transitions, 7495 flow [2023-09-01 09:38:26,772 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2479 places, 2737 transitions, 7495 flow [2023-09-01 09:38:26,772 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:38:26,773 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2479 places, 2737 transitions, 7495 flow [2023-09-01 09:38:26,773 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2479 places, 2737 transitions, 7495 flow [2023-09-01 09:38:26,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2479 places, 2737 transitions, 7495 flow [2023-09-01 09:38:29,928 INFO L130 PetriNetUnfolder]: 388/3251 cut-off events. [2023-09-01 09:38:29,928 INFO L131 PetriNetUnfolder]: For 14147/14147 co-relation queries the response was YES. [2023-09-01 09:38:30,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4327 conditions, 3251 events. 388/3251 cut-off events. For 14147/14147 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 15653 event pairs, 0 based on Foata normal form. 0/2776 useless extension candidates. Maximal degree in co-relation 4193. Up to 88 conditions per place. [2023-09-01 09:38:31,504 INFO L119 LiptonReduction]: Number of co-enabled transitions 7123552