./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-1.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e12b29ddb474fc17e74c2b71eb245022640b1de10fdbbb130c7f22e13cd3653f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 04:57:43,607 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 04:57:43,609 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 04:57:43,644 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 04:57:43,645 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 04:57:43,646 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 04:57:43,647 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 04:57:43,650 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 04:57:43,652 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 04:57:43,655 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 04:57:43,655 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 04:57:43,656 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 04:57:43,658 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 04:57:43,659 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 04:57:43,661 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 04:57:43,662 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 04:57:43,663 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 04:57:43,666 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 04:57:43,668 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 04:57:43,669 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 04:57:43,672 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 04:57:43,677 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 04:57:43,678 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 04:57:43,678 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 04:57:43,681 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 04:57:43,683 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 04:57:43,684 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 04:57:43,685 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 04:57:43,686 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 04:57:43,687 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 04:57:43,689 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 04:57:43,690 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 04:57:43,690 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 04:57:43,691 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 04:57:43,693 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 04:57:43,694 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 04:57:43,694 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 04:57:43,695 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 04:57:43,695 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 04:57:43,696 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 04:57:43,696 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 04:57:43,697 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-09-01 04:57:43,719 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 04:57:43,720 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 04:57:43,721 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 04:57:43,721 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 04:57:43,722 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 04:57:43,722 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 04:57:43,722 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 04:57:43,722 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 04:57:43,723 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 04:57:43,723 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 04:57:43,723 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 04:57:43,724 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 04:57:43,724 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 04:57:43,724 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 04:57:43,724 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 04:57:43,724 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 04:57:43,725 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 04:57:43,725 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 04:57:43,725 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-09-01 04:57:43,725 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 04:57:43,725 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 04:57:43,725 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 04:57:43,725 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 04:57:43,726 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 04:57:43,726 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 04:57:43,726 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 04:57:43,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:57:43,726 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 04:57:43,726 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 04:57:43,727 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 04:57:43,727 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 04:57:43,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 04:57:43,727 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 04:57:43,727 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 04:57:43,727 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 04:57:43,728 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 04:57:43,728 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 04:57:43,728 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e12b29ddb474fc17e74c2b71eb245022640b1de10fdbbb130c7f22e13cd3653f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 04:57:43,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 04:57:44,016 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 04:57:44,020 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 04:57:44,021 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 04:57:44,021 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 04:57:44,022 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-1.i [2023-09-01 04:57:44,940 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 04:57:45,172 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 04:57:45,172 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-1.i [2023-09-01 04:57:45,182 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1a175f31/2378b477dfd8411aa310c5b1c747ef44/FLAGf2d590472 [2023-09-01 04:57:45,201 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1a175f31/2378b477dfd8411aa310c5b1c747ef44 [2023-09-01 04:57:45,202 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 04:57:45,211 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 04:57:45,212 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 04:57:45,212 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 04:57:45,219 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 04:57:45,219 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:57:45" (1/1) ... [2023-09-01 04:57:45,220 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@256fef43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:57:45, skipping insertion in model container [2023-09-01 04:57:45,220 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:57:45" (1/1) ... [2023-09-01 04:57:45,225 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 04:57:45,269 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 04:57:45,557 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-1.i[31166,31179] [2023-09-01 04:57:45,568 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:57:45,578 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 04:57:45,612 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-1.i[31166,31179] [2023-09-01 04:57:45,615 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:57:45,646 INFO L208 MainTranslator]: Completed translation [2023-09-01 04:57:45,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:57:45 WrapperNode [2023-09-01 04:57:45,647 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 04:57:45,648 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 04:57:45,648 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 04:57:45,648 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 04:57:45,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:57:45" (1/1) ... [2023-09-01 04:57:45,679 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:57:45" (1/1) ... [2023-09-01 04:57:45,705 INFO L138 Inliner]: procedures = 177, calls = 47, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 198 [2023-09-01 04:57:45,705 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 04:57:45,706 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 04:57:45,707 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 04:57:45,707 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 04:57:45,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:57:45" (1/1) ... [2023-09-01 04:57:45,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:57:45" (1/1) ... [2023-09-01 04:57:45,727 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:57:45" (1/1) ... [2023-09-01 04:57:45,731 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:57:45" (1/1) ... [2023-09-01 04:57:45,735 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:57:45" (1/1) ... [2023-09-01 04:57:45,737 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:57:45" (1/1) ... [2023-09-01 04:57:45,739 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:57:45" (1/1) ... [2023-09-01 04:57:45,740 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:57:45" (1/1) ... [2023-09-01 04:57:45,742 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 04:57:45,742 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 04:57:45,743 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 04:57:45,743 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 04:57:45,743 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:57:45" (1/1) ... [2023-09-01 04:57:45,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:57:45,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:57:45,793 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 04:57:45,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 04:57:45,838 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 04:57:45,838 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-09-01 04:57:45,838 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-09-01 04:57:45,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 04:57:45,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 04:57:45,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 04:57:45,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 04:57:45,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 04:57:45,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 04:57:45,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 04:57:45,840 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 04:57:45,991 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 04:57:45,992 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 04:57:46,281 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 04:57:46,389 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 04:57:46,390 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 04:57:46,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 04:57:46 BoogieIcfgContainer [2023-09-01 04:57:46,391 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 04:57:46,393 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 04:57:46,393 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 04:57:46,395 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 04:57:46,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 04:57:45" (1/3) ... [2023-09-01 04:57:46,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61dfec99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 04:57:46, skipping insertion in model container [2023-09-01 04:57:46,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:57:45" (2/3) ... [2023-09-01 04:57:46,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61dfec99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 04:57:46, skipping insertion in model container [2023-09-01 04:57:46,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 04:57:46" (3/3) ... [2023-09-01 04:57:46,397 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longer-1.i [2023-09-01 04:57:46,403 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 04:57:46,409 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 04:57:46,409 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-09-01 04:57:46,409 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 04:57:46,499 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 04:57:46,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 133 transitions, 271 flow [2023-09-01 04:57:46,579 INFO L130 PetriNetUnfolder]: 11/143 cut-off events. [2023-09-01 04:57:46,579 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 04:57:46,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 143 events. 11/143 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 136 event pairs, 0 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 109. Up to 4 conditions per place. [2023-09-01 04:57:46,584 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 133 transitions, 271 flow [2023-09-01 04:57:46,590 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 133 transitions, 271 flow [2023-09-01 04:57:46,593 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:57:46,601 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 133 transitions, 271 flow [2023-09-01 04:57:46,603 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 133 transitions, 271 flow [2023-09-01 04:57:46,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 133 transitions, 271 flow [2023-09-01 04:57:46,627 INFO L130 PetriNetUnfolder]: 11/143 cut-off events. [2023-09-01 04:57:46,627 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 04:57:46,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 143 events. 11/143 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 136 event pairs, 0 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 109. Up to 4 conditions per place. [2023-09-01 04:57:46,630 INFO L119 LiptonReduction]: Number of co-enabled transitions 2522 [2023-09-01 04:57:50,580 INFO L134 LiptonReduction]: Checked pairs total: 3076 [2023-09-01 04:57:50,580 INFO L136 LiptonReduction]: Total number of compositions: 136 [2023-09-01 04:57:50,589 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 04:57:50,593 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;@45dbd80a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:57:50,593 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 04:57:50,596 INFO L130 PetriNetUnfolder]: 2/13 cut-off events. [2023-09-01 04:57:50,596 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 04:57:50,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:57:50,597 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-09-01 04:57:50,597 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 04:57:50,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:57:50,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1550590541, now seen corresponding path program 1 times [2023-09-01 04:57:50,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:57:50,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15196914] [2023-09-01 04:57:50,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:57:50,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:57:50,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:57:50,671 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 04:57:50,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:57:50,694 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 04:57:50,695 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 04:57:50,696 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 04:57:50,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 04:57:50,697 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 04:57:50,699 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 04:57:50,699 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 04:57:50,699 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 04:57:50,732 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 04:57:50,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 231 transitions, 474 flow [2023-09-01 04:57:50,769 INFO L130 PetriNetUnfolder]: 21/253 cut-off events. [2023-09-01 04:57:50,769 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 04:57:50,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 253 events. 21/253 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 535 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 206. Up to 6 conditions per place. [2023-09-01 04:57:50,773 INFO L82 GeneralOperation]: Start removeDead. Operand has 217 places, 231 transitions, 474 flow [2023-09-01 04:57:50,775 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 217 places, 231 transitions, 474 flow [2023-09-01 04:57:50,776 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:57:50,776 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 217 places, 231 transitions, 474 flow [2023-09-01 04:57:50,776 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 217 places, 231 transitions, 474 flow [2023-09-01 04:57:50,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 231 transitions, 474 flow [2023-09-01 04:57:50,821 INFO L130 PetriNetUnfolder]: 21/253 cut-off events. [2023-09-01 04:57:50,821 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 04:57:50,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 253 events. 21/253 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 535 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 206. Up to 6 conditions per place. [2023-09-01 04:57:50,831 INFO L119 LiptonReduction]: Number of co-enabled transitions 24056 [2023-09-01 04:57:54,580 INFO L134 LiptonReduction]: Checked pairs total: 65438 [2023-09-01 04:57:54,580 INFO L136 LiptonReduction]: Total number of compositions: 183 [2023-09-01 04:57:54,582 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 04:57:54,583 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;@45dbd80a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:57:54,583 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 04:57:54,586 INFO L130 PetriNetUnfolder]: 3/31 cut-off events. [2023-09-01 04:57:54,586 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 04:57:54,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:57:54,586 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-09-01 04:57:54,586 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 04:57:54,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:57:54,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1068023603, now seen corresponding path program 1 times [2023-09-01 04:57:54,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:57:54,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639489506] [2023-09-01 04:57:54,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:57:54,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:57:54,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:57:54,604 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 04:57:54,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:57:54,620 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 04:57:54,620 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 04:57:54,620 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 04:57:54,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 04:57:54,621 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 04:57:54,621 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 04:57:54,621 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 04:57:54,621 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-09-01 04:57:54,685 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 04:57:54,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 308 places, 329 transitions, 679 flow [2023-09-01 04:57:54,734 INFO L130 PetriNetUnfolder]: 31/363 cut-off events. [2023-09-01 04:57:54,735 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 04:57:54,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 363 events. 31/363 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1085 event pairs, 0 based on Foata normal form. 0/298 useless extension candidates. Maximal degree in co-relation 303. Up to 8 conditions per place. [2023-09-01 04:57:54,738 INFO L82 GeneralOperation]: Start removeDead. Operand has 308 places, 329 transitions, 679 flow [2023-09-01 04:57:54,745 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 308 places, 329 transitions, 679 flow [2023-09-01 04:57:54,746 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:57:54,746 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 308 places, 329 transitions, 679 flow [2023-09-01 04:57:54,746 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 308 places, 329 transitions, 679 flow [2023-09-01 04:57:54,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 308 places, 329 transitions, 679 flow [2023-09-01 04:57:54,789 INFO L130 PetriNetUnfolder]: 31/363 cut-off events. [2023-09-01 04:57:54,789 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 04:57:54,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 363 events. 31/363 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1085 event pairs, 0 based on Foata normal form. 0/298 useless extension candidates. Maximal degree in co-relation 303. Up to 8 conditions per place. [2023-09-01 04:57:54,810 INFO L119 LiptonReduction]: Number of co-enabled transitions 64602 [2023-09-01 04:57:59,950 INFO L134 LiptonReduction]: Checked pairs total: 172575 [2023-09-01 04:57:59,950 INFO L136 LiptonReduction]: Total number of compositions: 247 [2023-09-01 04:57:59,952 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 04:57:59,952 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;@45dbd80a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:57:59,952 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 04:57:59,956 INFO L130 PetriNetUnfolder]: 4/54 cut-off events. [2023-09-01 04:57:59,956 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 04:57:59,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:57:59,956 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-09-01 04:57:59,957 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 04:57:59,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:57:59,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1213916751, now seen corresponding path program 1 times [2023-09-01 04:57:59,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:57:59,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006702295] [2023-09-01 04:57:59,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:57:59,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:57:59,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:57:59,973 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 04:58:00,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:58:00,007 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 04:58:00,007 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 04:58:00,008 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 04:58:00,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 04:58:00,008 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 04:58:00,008 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 04:58:00,008 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 04:58:00,009 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-09-01 04:58:00,085 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 04:58:00,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 399 places, 427 transitions, 886 flow [2023-09-01 04:58:00,150 INFO L130 PetriNetUnfolder]: 41/473 cut-off events. [2023-09-01 04:58:00,150 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 04:58:00,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 473 events. 41/473 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1679 event pairs, 0 based on Foata normal form. 0/387 useless extension candidates. Maximal degree in co-relation 400. Up to 10 conditions per place. [2023-09-01 04:58:00,156 INFO L82 GeneralOperation]: Start removeDead. Operand has 399 places, 427 transitions, 886 flow [2023-09-01 04:58:00,160 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 399 places, 427 transitions, 886 flow [2023-09-01 04:58:00,161 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:58:00,161 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 399 places, 427 transitions, 886 flow [2023-09-01 04:58:00,161 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 399 places, 427 transitions, 886 flow [2023-09-01 04:58:00,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 399 places, 427 transitions, 886 flow [2023-09-01 04:58:00,256 INFO L130 PetriNetUnfolder]: 41/473 cut-off events. [2023-09-01 04:58:00,256 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 04:58:00,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 473 events. 41/473 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1679 event pairs, 0 based on Foata normal form. 0/387 useless extension candidates. Maximal degree in co-relation 400. Up to 10 conditions per place. [2023-09-01 04:58:00,283 INFO L119 LiptonReduction]: Number of co-enabled transitions 124160 [2023-09-01 04:58:06,481 INFO L134 LiptonReduction]: Checked pairs total: 353281 [2023-09-01 04:58:06,482 INFO L136 LiptonReduction]: Total number of compositions: 325 [2023-09-01 04:58:06,483 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 04:58:06,483 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;@45dbd80a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:58:06,484 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 04:58:06,490 INFO L130 PetriNetUnfolder]: 8/99 cut-off events. [2023-09-01 04:58:06,490 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 04:58:06,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:58:06,491 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-09-01 04:58:06,491 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 04:58:06,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:58:06,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1783804678, now seen corresponding path program 1 times [2023-09-01 04:58:06,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:58:06,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644332795] [2023-09-01 04:58:06,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:58:06,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:58:06,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:58:06,518 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 04:58:06,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:58:06,534 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 04:58:06,534 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 04:58:06,534 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 04:58:06,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 04:58:06,534 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 04:58:06,535 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 04:58:06,535 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 04:58:06,535 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-09-01 04:58:06,582 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 04:58:06,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 490 places, 525 transitions, 1095 flow [2023-09-01 04:58:06,699 INFO L130 PetriNetUnfolder]: 51/583 cut-off events. [2023-09-01 04:58:06,700 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 04:58:06,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 614 conditions, 583 events. 51/583 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2296 event pairs, 0 based on Foata normal form. 0/476 useless extension candidates. Maximal degree in co-relation 497. Up to 12 conditions per place. [2023-09-01 04:58:06,707 INFO L82 GeneralOperation]: Start removeDead. Operand has 490 places, 525 transitions, 1095 flow [2023-09-01 04:58:06,712 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 490 places, 525 transitions, 1095 flow [2023-09-01 04:58:06,712 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:58:06,712 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 490 places, 525 transitions, 1095 flow [2023-09-01 04:58:06,712 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 490 places, 525 transitions, 1095 flow [2023-09-01 04:58:06,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 490 places, 525 transitions, 1095 flow [2023-09-01 04:58:06,800 INFO L130 PetriNetUnfolder]: 51/583 cut-off events. [2023-09-01 04:58:06,800 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 04:58:06,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 614 conditions, 583 events. 51/583 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2296 event pairs, 0 based on Foata normal form. 0/476 useless extension candidates. Maximal degree in co-relation 497. Up to 12 conditions per place. [2023-09-01 04:58:06,843 INFO L119 LiptonReduction]: Number of co-enabled transitions 202730 [2023-09-01 04:58:14,656 INFO L134 LiptonReduction]: Checked pairs total: 577123 [2023-09-01 04:58:14,657 INFO L136 LiptonReduction]: Total number of compositions: 402 [2023-09-01 04:58:14,660 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 04:58:14,662 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;@45dbd80a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:58:14,662 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 04:58:14,675 INFO L130 PetriNetUnfolder]: 16/150 cut-off events. [2023-09-01 04:58:14,675 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 04:58:14,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:58:14,676 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:58:14,680 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 04:58:14,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:58:14,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1335391351, now seen corresponding path program 1 times [2023-09-01 04:58:14,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:58:14,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322293023] [2023-09-01 04:58:14,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:58:14,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:58:14,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:58:14,724 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 04:58:14,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:58:14,750 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 04:58:14,756 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 04:58:14,756 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 04:58:14,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 04:58:14,757 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 04:58:14,757 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 04:58:14,759 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 04:58:14,760 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-09-01 04:58:14,814 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 04:58:14,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 581 places, 623 transitions, 1306 flow [2023-09-01 04:58:14,990 INFO L130 PetriNetUnfolder]: 61/693 cut-off events. [2023-09-01 04:58:14,991 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 04:58:15,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 733 conditions, 693 events. 61/693 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2979 event pairs, 0 based on Foata normal form. 0/565 useless extension candidates. Maximal degree in co-relation 602. Up to 14 conditions per place. [2023-09-01 04:58:15,002 INFO L82 GeneralOperation]: Start removeDead. Operand has 581 places, 623 transitions, 1306 flow [2023-09-01 04:58:15,010 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 581 places, 623 transitions, 1306 flow [2023-09-01 04:58:15,011 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:58:15,012 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 581 places, 623 transitions, 1306 flow [2023-09-01 04:58:15,012 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 581 places, 623 transitions, 1306 flow [2023-09-01 04:58:15,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 581 places, 623 transitions, 1306 flow [2023-09-01 04:58:15,149 INFO L130 PetriNetUnfolder]: 61/693 cut-off events. [2023-09-01 04:58:15,149 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 04:58:15,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 733 conditions, 693 events. 61/693 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2979 event pairs, 0 based on Foata normal form. 0/565 useless extension candidates. Maximal degree in co-relation 602. Up to 14 conditions per place. [2023-09-01 04:58:15,211 INFO L119 LiptonReduction]: Number of co-enabled transitions 300312 [2023-09-01 04:58:23,912 INFO L134 LiptonReduction]: Checked pairs total: 873712 [2023-09-01 04:58:23,913 INFO L136 LiptonReduction]: Total number of compositions: 477 [2023-09-01 04:58:23,914 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 04:58:23,914 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;@45dbd80a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:58:23,915 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 04:58:23,930 INFO L130 PetriNetUnfolder]: 22/199 cut-off events. [2023-09-01 04:58:23,930 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 04:58:23,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:58:23,930 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:58:23,930 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 04:58:23,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:58:23,931 INFO L85 PathProgramCache]: Analyzing trace with hash -13033532, now seen corresponding path program 1 times [2023-09-01 04:58:23,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:58:23,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909611661] [2023-09-01 04:58:23,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:58:23,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:58:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:58:23,957 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 04:58:23,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:58:23,976 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 04:58:23,980 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 04:58:23,980 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 04:58:23,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 04:58:23,981 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 04:58:23,981 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 04:58:23,983 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 04:58:23,983 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-09-01 04:58:24,065 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 04:58:24,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 672 places, 721 transitions, 1519 flow [2023-09-01 04:58:24,269 INFO L130 PetriNetUnfolder]: 71/803 cut-off events. [2023-09-01 04:58:24,270 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-09-01 04:58:24,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 853 conditions, 803 events. 71/803 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3649 event pairs, 0 based on Foata normal form. 0/654 useless extension candidates. Maximal degree in co-relation 719. Up to 16 conditions per place. [2023-09-01 04:58:24,286 INFO L82 GeneralOperation]: Start removeDead. Operand has 672 places, 721 transitions, 1519 flow [2023-09-01 04:58:24,292 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 672 places, 721 transitions, 1519 flow [2023-09-01 04:58:24,293 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:58:24,293 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 672 places, 721 transitions, 1519 flow [2023-09-01 04:58:24,294 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 672 places, 721 transitions, 1519 flow [2023-09-01 04:58:24,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 672 places, 721 transitions, 1519 flow [2023-09-01 04:58:24,452 INFO L130 PetriNetUnfolder]: 71/803 cut-off events. [2023-09-01 04:58:24,452 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-09-01 04:58:24,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 853 conditions, 803 events. 71/803 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3649 event pairs, 0 based on Foata normal form. 0/654 useless extension candidates. Maximal degree in co-relation 719. Up to 16 conditions per place. [2023-09-01 04:58:24,593 INFO L119 LiptonReduction]: Number of co-enabled transitions 416906 [2023-09-01 04:58:35,129 INFO L134 LiptonReduction]: Checked pairs total: 1191750 [2023-09-01 04:58:35,130 INFO L136 LiptonReduction]: Total number of compositions: 550 [2023-09-01 04:58:35,131 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 04:58:35,134 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;@45dbd80a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:58:35,135 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 04:58:35,158 INFO L130 PetriNetUnfolder]: 30/250 cut-off events. [2023-09-01 04:58:35,159 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-09-01 04:58:35,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:58:35,159 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:58:35,159 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 04:58:35,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:58:35,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1927094219, now seen corresponding path program 1 times [2023-09-01 04:58:35,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:58:35,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513577480] [2023-09-01 04:58:35,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:58:35,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:58:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:58:35,198 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 04:58:35,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:58:35,220 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 04:58:35,220 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 04:58:35,221 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 04:58:35,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 04:58:35,221 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 04:58:35,221 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 04:58:35,221 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 04:58:35,222 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-09-01 04:58:35,290 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 04:58:35,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 763 places, 819 transitions, 1734 flow [2023-09-01 04:58:35,534 INFO L130 PetriNetUnfolder]: 81/913 cut-off events. [2023-09-01 04:58:35,535 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-09-01 04:58:35,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 974 conditions, 913 events. 81/913 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4325 event pairs, 0 based on Foata normal form. 0/743 useless extension candidates. Maximal degree in co-relation 837. Up to 18 conditions per place. [2023-09-01 04:58:35,549 INFO L82 GeneralOperation]: Start removeDead. Operand has 763 places, 819 transitions, 1734 flow [2023-09-01 04:58:35,555 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 763 places, 819 transitions, 1734 flow [2023-09-01 04:58:35,555 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:58:35,555 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 763 places, 819 transitions, 1734 flow [2023-09-01 04:58:35,555 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 763 places, 819 transitions, 1734 flow [2023-09-01 04:58:35,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 763 places, 819 transitions, 1734 flow [2023-09-01 04:58:35,744 INFO L130 PetriNetUnfolder]: 81/913 cut-off events. [2023-09-01 04:58:35,744 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-09-01 04:58:35,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 974 conditions, 913 events. 81/913 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4325 event pairs, 0 based on Foata normal form. 0/743 useless extension candidates. Maximal degree in co-relation 837. Up to 18 conditions per place. [2023-09-01 04:58:35,852 INFO L119 LiptonReduction]: Number of co-enabled transitions 552512 [2023-09-01 04:58:46,950 INFO L134 LiptonReduction]: Checked pairs total: 1608532 [2023-09-01 04:58:46,951 INFO L136 LiptonReduction]: Total number of compositions: 624 [2023-09-01 04:58:46,953 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 04:58:46,953 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;@45dbd80a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:58:46,953 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 04:58:46,984 INFO L130 PetriNetUnfolder]: 37/305 cut-off events. [2023-09-01 04:58:46,984 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-09-01 04:58:46,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:58:46,984 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:58:46,984 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 04:58:46,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:58:46,985 INFO L85 PathProgramCache]: Analyzing trace with hash 84623084, now seen corresponding path program 1 times [2023-09-01 04:58:46,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:58:46,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734992600] [2023-09-01 04:58:46,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:58:46,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:58:47,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:58:47,005 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 04:58:47,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:58:47,018 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 04:58:47,019 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 04:58:47,019 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 04:58:47,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 04:58:47,019 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 04:58:47,019 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 04:58:47,020 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 04:58:47,020 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-09-01 04:58:47,143 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 04:58:47,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 854 places, 917 transitions, 1951 flow [2023-09-01 04:58:47,445 INFO L130 PetriNetUnfolder]: 91/1023 cut-off events. [2023-09-01 04:58:47,445 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-09-01 04:58:47,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1096 conditions, 1023 events. 91/1023 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 5059 event pairs, 0 based on Foata normal form. 0/832 useless extension candidates. Maximal degree in co-relation 956. Up to 20 conditions per place. [2023-09-01 04:58:47,478 INFO L82 GeneralOperation]: Start removeDead. Operand has 854 places, 917 transitions, 1951 flow [2023-09-01 04:58:47,490 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 854 places, 917 transitions, 1951 flow [2023-09-01 04:58:47,490 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:58:47,491 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 854 places, 917 transitions, 1951 flow [2023-09-01 04:58:47,491 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 854 places, 917 transitions, 1951 flow [2023-09-01 04:58:47,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 854 places, 917 transitions, 1951 flow [2023-09-01 04:58:47,841 INFO L130 PetriNetUnfolder]: 91/1023 cut-off events. [2023-09-01 04:58:47,842 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-09-01 04:58:47,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1096 conditions, 1023 events. 91/1023 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 5059 event pairs, 0 based on Foata normal form. 0/832 useless extension candidates. Maximal degree in co-relation 956. Up to 20 conditions per place. [2023-09-01 04:58:47,993 INFO L119 LiptonReduction]: Number of co-enabled transitions 707130 [2023-09-01 04:59:01,087 INFO L134 LiptonReduction]: Checked pairs total: 2282311 [2023-09-01 04:59:01,087 INFO L136 LiptonReduction]: Total number of compositions: 704 [2023-09-01 04:59:01,089 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 04:59:01,089 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;@45dbd80a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:59:01,089 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 04:59:01,153 INFO L130 PetriNetUnfolder]: 44/351 cut-off events. [2023-09-01 04:59:01,153 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-09-01 04:59:01,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:59:01,154 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:59:01,154 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 04:59:01,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:59:01,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1043776736, now seen corresponding path program 1 times [2023-09-01 04:59:01,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:59:01,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278672721] [2023-09-01 04:59:01,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:59:01,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:59:01,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:59:01,182 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 04:59:01,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:59:01,207 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 04:59:01,207 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 04:59:01,207 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 04:59:01,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 04:59:01,207 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 04:59:01,208 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 04:59:01,208 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 04:59:01,208 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-09-01 04:59:01,345 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 04:59:01,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 945 places, 1015 transitions, 2170 flow [2023-09-01 04:59:01,722 INFO L130 PetriNetUnfolder]: 101/1133 cut-off events. [2023-09-01 04:59:01,722 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-09-01 04:59:01,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1219 conditions, 1133 events. 101/1133 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 5728 event pairs, 0 based on Foata normal form. 0/921 useless extension candidates. Maximal degree in co-relation 1076. Up to 22 conditions per place. [2023-09-01 04:59:01,767 INFO L82 GeneralOperation]: Start removeDead. Operand has 945 places, 1015 transitions, 2170 flow [2023-09-01 04:59:01,779 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 945 places, 1015 transitions, 2170 flow [2023-09-01 04:59:01,780 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:59:01,780 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 945 places, 1015 transitions, 2170 flow [2023-09-01 04:59:01,780 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 945 places, 1015 transitions, 2170 flow [2023-09-01 04:59:01,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 945 places, 1015 transitions, 2170 flow [2023-09-01 04:59:02,163 INFO L130 PetriNetUnfolder]: 101/1133 cut-off events. [2023-09-01 04:59:02,163 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-09-01 04:59:02,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1219 conditions, 1133 events. 101/1133 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 5728 event pairs, 0 based on Foata normal form. 0/921 useless extension candidates. Maximal degree in co-relation 1076. Up to 22 conditions per place. [2023-09-01 04:59:02,319 INFO L119 LiptonReduction]: Number of co-enabled transitions 880760 [2023-09-01 04:59:16,112 INFO L134 LiptonReduction]: Checked pairs total: 2566361 [2023-09-01 04:59:16,113 INFO L136 LiptonReduction]: Total number of compositions: 776 [2023-09-01 04:59:16,115 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 04:59:16,115 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;@45dbd80a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:59:16,115 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 04:59:16,226 INFO L130 PetriNetUnfolder]: 51/402 cut-off events. [2023-09-01 04:59:16,226 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-09-01 04:59:16,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:59:16,226 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:59:16,226 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 04:59:16,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:59:16,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1380839406, now seen corresponding path program 1 times [2023-09-01 04:59:16,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:59:16,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145118331] [2023-09-01 04:59:16,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:59:16,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:59:16,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:59:16,251 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 04:59:16,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:59:16,276 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 04:59:16,276 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 04:59:16,276 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 04:59:16,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 04:59:16,276 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 04:59:16,277 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 04:59:16,277 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 04:59:16,277 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-09-01 04:59:16,405 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 04:59:16,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1036 places, 1113 transitions, 2391 flow [2023-09-01 04:59:17,018 INFO L130 PetriNetUnfolder]: 111/1243 cut-off events. [2023-09-01 04:59:17,019 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-09-01 04:59:17,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1343 conditions, 1243 events. 111/1243 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 6400 event pairs, 0 based on Foata normal form. 0/1010 useless extension candidates. Maximal degree in co-relation 1199. Up to 24 conditions per place. [2023-09-01 04:59:17,096 INFO L82 GeneralOperation]: Start removeDead. Operand has 1036 places, 1113 transitions, 2391 flow [2023-09-01 04:59:17,115 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1036 places, 1113 transitions, 2391 flow [2023-09-01 04:59:17,115 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:59:17,115 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1036 places, 1113 transitions, 2391 flow [2023-09-01 04:59:17,116 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1036 places, 1113 transitions, 2391 flow [2023-09-01 04:59:17,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1036 places, 1113 transitions, 2391 flow [2023-09-01 04:59:17,614 INFO L130 PetriNetUnfolder]: 111/1243 cut-off events. [2023-09-01 04:59:17,615 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-09-01 04:59:17,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1343 conditions, 1243 events. 111/1243 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 6400 event pairs, 0 based on Foata normal form. 0/1010 useless extension candidates. Maximal degree in co-relation 1199. Up to 24 conditions per place. [2023-09-01 04:59:17,844 INFO L119 LiptonReduction]: Number of co-enabled transitions 1073402 [2023-09-01 04:59:32,843 INFO L134 LiptonReduction]: Checked pairs total: 3507382 [2023-09-01 04:59:32,844 INFO L136 LiptonReduction]: Total number of compositions: 849 [2023-09-01 04:59:32,847 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 04:59:32,847 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;@45dbd80a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:59:32,847 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 04:59:32,908 INFO L130 PetriNetUnfolder]: 58/455 cut-off events. [2023-09-01 04:59:32,909 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-09-01 04:59:32,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:59:32,909 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:59:32,909 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 04:59:32,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:59:32,910 INFO L85 PathProgramCache]: Analyzing trace with hash -361810310, now seen corresponding path program 1 times [2023-09-01 04:59:32,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:59:32,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427123338] [2023-09-01 04:59:32,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:59:32,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:59:32,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:59:32,936 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 04:59:32,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:59:32,961 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 04:59:32,962 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 04:59:32,962 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 04:59:32,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 04:59:32,962 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 04:59:32,963 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 04:59:32,963 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 04:59:32,963 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-09-01 04:59:33,076 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 04:59:33,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1127 places, 1211 transitions, 2614 flow [2023-09-01 04:59:33,670 INFO L130 PetriNetUnfolder]: 121/1353 cut-off events. [2023-09-01 04:59:33,671 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-09-01 04:59:33,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1468 conditions, 1353 events. 121/1353 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 7070 event pairs, 0 based on Foata normal form. 0/1099 useless extension candidates. Maximal degree in co-relation 1323. Up to 26 conditions per place. [2023-09-01 04:59:33,712 INFO L82 GeneralOperation]: Start removeDead. Operand has 1127 places, 1211 transitions, 2614 flow [2023-09-01 04:59:33,725 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1127 places, 1211 transitions, 2614 flow [2023-09-01 04:59:33,725 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:59:33,725 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1127 places, 1211 transitions, 2614 flow [2023-09-01 04:59:33,725 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1127 places, 1211 transitions, 2614 flow [2023-09-01 04:59:33,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1127 places, 1211 transitions, 2614 flow [2023-09-01 04:59:34,233 INFO L130 PetriNetUnfolder]: 121/1353 cut-off events. [2023-09-01 04:59:34,234 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-09-01 04:59:34,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1468 conditions, 1353 events. 121/1353 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 7070 event pairs, 0 based on Foata normal form. 0/1099 useless extension candidates. Maximal degree in co-relation 1323. Up to 26 conditions per place. [2023-09-01 04:59:34,523 INFO L119 LiptonReduction]: Number of co-enabled transitions 1285056 [2023-09-01 04:59:49,804 INFO L134 LiptonReduction]: Checked pairs total: 4170663 [2023-09-01 04:59:49,805 INFO L136 LiptonReduction]: Total number of compositions: 919 [2023-09-01 04:59:49,806 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 04:59:49,807 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;@45dbd80a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:59:49,807 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 04:59:49,882 INFO L130 PetriNetUnfolder]: 64/499 cut-off events. [2023-09-01 04:59:49,882 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-09-01 04:59:49,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:59:49,882 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 04:59:49,883 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 04:59:49,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:59:49,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1008849469, now seen corresponding path program 1 times [2023-09-01 04:59:49,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:59:49,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018499135] [2023-09-01 04:59:49,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:59:49,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:59:49,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:59:49,910 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 04:59:49,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:59:49,937 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 04:59:49,938 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 04:59:49,938 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 04:59:49,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 04:59:49,938 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 04:59:49,939 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 04:59:49,939 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 04:59:49,939 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-09-01 04:59:50,065 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 04:59:50,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1218 places, 1309 transitions, 2839 flow [2023-09-01 04:59:50,776 INFO L130 PetriNetUnfolder]: 131/1463 cut-off events. [2023-09-01 04:59:50,776 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-09-01 04:59:50,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1594 conditions, 1463 events. 131/1463 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 7779 event pairs, 0 based on Foata normal form. 0/1188 useless extension candidates. Maximal degree in co-relation 1448. Up to 28 conditions per place. [2023-09-01 04:59:50,825 INFO L82 GeneralOperation]: Start removeDead. Operand has 1218 places, 1309 transitions, 2839 flow [2023-09-01 04:59:50,838 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1218 places, 1309 transitions, 2839 flow [2023-09-01 04:59:50,838 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:59:50,839 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1218 places, 1309 transitions, 2839 flow [2023-09-01 04:59:50,839 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1218 places, 1309 transitions, 2839 flow [2023-09-01 04:59:50,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1218 places, 1309 transitions, 2839 flow [2023-09-01 04:59:51,405 INFO L130 PetriNetUnfolder]: 131/1463 cut-off events. [2023-09-01 04:59:51,405 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-09-01 04:59:51,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1594 conditions, 1463 events. 131/1463 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 7779 event pairs, 0 based on Foata normal form. 0/1188 useless extension candidates. Maximal degree in co-relation 1448. Up to 28 conditions per place. [2023-09-01 04:59:51,758 INFO L119 LiptonReduction]: Number of co-enabled transitions 1515722 [2023-09-01 05:00:09,227 INFO L134 LiptonReduction]: Checked pairs total: 4415961 [2023-09-01 05:00:09,227 INFO L136 LiptonReduction]: Total number of compositions: 980 [2023-09-01 05:00:09,240 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:00:09,240 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;@45dbd80a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:00:09,240 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:00:09,356 INFO L130 PetriNetUnfolder]: 72/553 cut-off events. [2023-09-01 05:00:09,357 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-09-01 05:00:09,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:00:09,357 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:00:09,357 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:00:09,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:00:09,358 INFO L85 PathProgramCache]: Analyzing trace with hash -357850694, now seen corresponding path program 1 times [2023-09-01 05:00:09,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:00:09,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737630819] [2023-09-01 05:00:09,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:00:09,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:00:09,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:00:09,380 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:00:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:00:09,399 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:00:09,399 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:00:09,400 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:00:09,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 05:00:09,400 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:00:09,400 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:00:09,401 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:00:09,401 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-09-01 05:00:09,527 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:00:09,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1309 places, 1407 transitions, 3066 flow [2023-09-01 05:00:10,362 INFO L130 PetriNetUnfolder]: 141/1573 cut-off events. [2023-09-01 05:00:10,362 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-09-01 05:00:10,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1721 conditions, 1573 events. 141/1573 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 8445 event pairs, 0 based on Foata normal form. 0/1277 useless extension candidates. Maximal degree in co-relation 1574. Up to 30 conditions per place. [2023-09-01 05:00:10,413 INFO L82 GeneralOperation]: Start removeDead. Operand has 1309 places, 1407 transitions, 3066 flow [2023-09-01 05:00:10,428 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1309 places, 1407 transitions, 3066 flow [2023-09-01 05:00:10,428 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:00:10,428 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1309 places, 1407 transitions, 3066 flow [2023-09-01 05:00:10,428 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1309 places, 1407 transitions, 3066 flow [2023-09-01 05:00:10,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1309 places, 1407 transitions, 3066 flow [2023-09-01 05:00:11,087 INFO L130 PetriNetUnfolder]: 141/1573 cut-off events. [2023-09-01 05:00:11,087 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-09-01 05:00:11,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1721 conditions, 1573 events. 141/1573 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 8445 event pairs, 0 based on Foata normal form. 0/1277 useless extension candidates. Maximal degree in co-relation 1574. Up to 30 conditions per place. [2023-09-01 05:00:11,519 INFO L119 LiptonReduction]: Number of co-enabled transitions 1765400 [2023-09-01 05:00:29,767 INFO L134 LiptonReduction]: Checked pairs total: 5183324 [2023-09-01 05:00:29,767 INFO L136 LiptonReduction]: Total number of compositions: 1068 [2023-09-01 05:00:29,768 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:00:29,769 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;@45dbd80a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:00:29,769 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:00:29,878 INFO L130 PetriNetUnfolder]: 78/608 cut-off events. [2023-09-01 05:00:29,878 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-09-01 05:00:29,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:00:29,879 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:00:29,879 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:00:29,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:00:29,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1878621585, now seen corresponding path program 1 times [2023-09-01 05:00:29,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:00:29,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279707420] [2023-09-01 05:00:29,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:00:29,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:00:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:00:29,916 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:00:29,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:00:29,945 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:00:29,945 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:00:29,945 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:00:29,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-09-01 05:00:29,946 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:00:29,946 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:00:29,946 WARN L233 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:00:29,946 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2023-09-01 05:00:30,102 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:00:30,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1400 places, 1505 transitions, 3295 flow [2023-09-01 05:00:31,064 INFO L130 PetriNetUnfolder]: 151/1683 cut-off events. [2023-09-01 05:00:31,064 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-09-01 05:00:31,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1849 conditions, 1683 events. 151/1683 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 9142 event pairs, 0 based on Foata normal form. 0/1366 useless extension candidates. Maximal degree in co-relation 1701. Up to 32 conditions per place. [2023-09-01 05:00:31,121 INFO L82 GeneralOperation]: Start removeDead. Operand has 1400 places, 1505 transitions, 3295 flow [2023-09-01 05:00:31,138 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1400 places, 1505 transitions, 3295 flow [2023-09-01 05:00:31,138 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:00:31,138 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1400 places, 1505 transitions, 3295 flow [2023-09-01 05:00:31,138 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1400 places, 1505 transitions, 3295 flow [2023-09-01 05:00:31,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1400 places, 1505 transitions, 3295 flow [2023-09-01 05:00:31,903 INFO L130 PetriNetUnfolder]: 151/1683 cut-off events. [2023-09-01 05:00:31,904 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-09-01 05:00:32,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1849 conditions, 1683 events. 151/1683 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 9142 event pairs, 0 based on Foata normal form. 0/1366 useless extension candidates. Maximal degree in co-relation 1701. Up to 32 conditions per place. [2023-09-01 05:00:32,456 INFO L119 LiptonReduction]: Number of co-enabled transitions 2034090 [2023-09-01 05:00:53,902 INFO L134 LiptonReduction]: Checked pairs total: 6592358 [2023-09-01 05:00:53,902 INFO L136 LiptonReduction]: Total number of compositions: 1137 [2023-09-01 05:00:53,903 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:00:53,904 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;@45dbd80a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:00:53,904 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:00:54,054 INFO L130 PetriNetUnfolder]: 85/652 cut-off events. [2023-09-01 05:00:54,055 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-09-01 05:00:54,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:00:54,055 INFO L208 CegarLoopForPetriNet]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:00:54,055 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:00:54,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:00:54,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1862721328, now seen corresponding path program 1 times [2023-09-01 05:00:54,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:00:54,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547923079] [2023-09-01 05:00:54,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:00:54,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:00:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:00:54,094 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:00:54,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:00:54,122 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:00:54,122 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:00:54,123 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:00:54,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-09-01 05:00:54,123 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:00:54,123 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:00:54,124 WARN L233 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:00:54,124 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2023-09-01 05:00:54,268 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:00:54,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1491 places, 1603 transitions, 3526 flow [2023-09-01 05:00:55,161 INFO L130 PetriNetUnfolder]: 161/1793 cut-off events. [2023-09-01 05:00:55,161 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-09-01 05:00:55,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1978 conditions, 1793 events. 161/1793 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 9844 event pairs, 0 based on Foata normal form. 0/1455 useless extension candidates. Maximal degree in co-relation 1829. Up to 34 conditions per place. [2023-09-01 05:00:55,267 INFO L82 GeneralOperation]: Start removeDead. Operand has 1491 places, 1603 transitions, 3526 flow [2023-09-01 05:00:55,297 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1491 places, 1603 transitions, 3526 flow [2023-09-01 05:00:55,297 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:00:55,297 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1491 places, 1603 transitions, 3526 flow [2023-09-01 05:00:55,297 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1491 places, 1603 transitions, 3526 flow [2023-09-01 05:00:55,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1491 places, 1603 transitions, 3526 flow [2023-09-01 05:00:56,122 INFO L130 PetriNetUnfolder]: 161/1793 cut-off events. [2023-09-01 05:00:56,122 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-09-01 05:00:56,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1978 conditions, 1793 events. 161/1793 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 9844 event pairs, 0 based on Foata normal form. 0/1455 useless extension candidates. Maximal degree in co-relation 1829. Up to 34 conditions per place. [2023-09-01 05:00:56,679 INFO L119 LiptonReduction]: Number of co-enabled transitions 2321792 [2023-09-01 05:01:20,642 INFO L134 LiptonReduction]: Checked pairs total: 7579547 [2023-09-01 05:01:20,642 INFO L136 LiptonReduction]: Total number of compositions: 1222 [2023-09-01 05:01:20,648 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:01:20,649 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;@45dbd80a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:01:20,649 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:01:20,803 INFO L130 PetriNetUnfolder]: 92/705 cut-off events. [2023-09-01 05:01:20,803 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-09-01 05:01:20,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:01:20,804 INFO L208 CegarLoopForPetriNet]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:01:20,804 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:01:20,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:01:20,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1636104487, now seen corresponding path program 1 times [2023-09-01 05:01:20,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:01:20,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830289621] [2023-09-01 05:01:20,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:01:20,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:01:20,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:01:20,851 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:01:20,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:01:20,875 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:01:20,875 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:01:20,875 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:01:20,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-09-01 05:01:20,875 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:01:20,876 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:01:20,876 WARN L233 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:01:20,876 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2023-09-01 05:01:21,030 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:01:21,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1582 places, 1701 transitions, 3759 flow [2023-09-01 05:01:22,136 INFO L130 PetriNetUnfolder]: 171/1903 cut-off events. [2023-09-01 05:01:22,136 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-09-01 05:01:22,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2108 conditions, 1903 events. 171/1903 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 10500 event pairs, 0 based on Foata normal form. 0/1544 useless extension candidates. Maximal degree in co-relation 1958. Up to 36 conditions per place. [2023-09-01 05:01:22,254 INFO L82 GeneralOperation]: Start removeDead. Operand has 1582 places, 1701 transitions, 3759 flow [2023-09-01 05:01:22,286 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1582 places, 1701 transitions, 3759 flow [2023-09-01 05:01:22,286 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:01:22,286 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1582 places, 1701 transitions, 3759 flow [2023-09-01 05:01:22,286 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1582 places, 1701 transitions, 3759 flow [2023-09-01 05:01:22,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1582 places, 1701 transitions, 3759 flow [2023-09-01 05:01:23,582 INFO L130 PetriNetUnfolder]: 171/1903 cut-off events. [2023-09-01 05:01:23,583 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-09-01 05:01:23,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2108 conditions, 1903 events. 171/1903 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 10500 event pairs, 0 based on Foata normal form. 0/1544 useless extension candidates. Maximal degree in co-relation 1958. Up to 36 conditions per place. [2023-09-01 05:01:24,086 INFO L119 LiptonReduction]: Number of co-enabled transitions 2628506 [2023-09-01 05:01:48,724 INFO L134 LiptonReduction]: Checked pairs total: 8522192 [2023-09-01 05:01:48,724 INFO L136 LiptonReduction]: Total number of compositions: 1282 [2023-09-01 05:01:48,726 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:01:48,726 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;@45dbd80a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:01:48,726 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:01:48,885 INFO L130 PetriNetUnfolder]: 100/762 cut-off events. [2023-09-01 05:01:48,885 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-09-01 05:01:48,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:01:48,885 INFO L208 CegarLoopForPetriNet]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:01:48,886 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:01:48,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:01:48,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1746100533, now seen corresponding path program 1 times [2023-09-01 05:01:48,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:01:48,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535456286] [2023-09-01 05:01:48,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:01:48,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:01:48,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:01:48,915 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:01:48,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:01:48,938 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:01:48,938 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:01:48,939 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:01:48,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-09-01 05:01:48,939 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:01:48,939 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:01:48,939 WARN L233 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:01:48,939 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2023-09-01 05:01:49,076 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:01:49,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1673 places, 1799 transitions, 3994 flow [2023-09-01 05:01:50,332 INFO L130 PetriNetUnfolder]: 181/2013 cut-off events. [2023-09-01 05:01:50,333 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-09-01 05:01:50,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2239 conditions, 2013 events. 181/2013 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 11209 event pairs, 0 based on Foata normal form. 0/1633 useless extension candidates. Maximal degree in co-relation 2088. Up to 38 conditions per place. [2023-09-01 05:01:50,461 INFO L82 GeneralOperation]: Start removeDead. Operand has 1673 places, 1799 transitions, 3994 flow [2023-09-01 05:01:50,489 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1673 places, 1799 transitions, 3994 flow [2023-09-01 05:01:50,489 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:01:50,489 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1673 places, 1799 transitions, 3994 flow [2023-09-01 05:01:50,489 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1673 places, 1799 transitions, 3994 flow [2023-09-01 05:01:50,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1673 places, 1799 transitions, 3994 flow [2023-09-01 05:01:52,132 INFO L130 PetriNetUnfolder]: 181/2013 cut-off events. [2023-09-01 05:01:52,132 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-09-01 05:01:52,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2239 conditions, 2013 events. 181/2013 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 11209 event pairs, 0 based on Foata normal form. 0/1633 useless extension candidates. Maximal degree in co-relation 2088. Up to 38 conditions per place. [2023-09-01 05:01:52,865 INFO L119 LiptonReduction]: Number of co-enabled transitions 2954232 [2023-09-01 05:02:19,855 INFO L134 LiptonReduction]: Checked pairs total: 8571900 [2023-09-01 05:02:19,855 INFO L136 LiptonReduction]: Total number of compositions: 1351 [2023-09-01 05:02:19,857 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:02:19,858 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;@45dbd80a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:02:19,858 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:02:20,235 INFO L130 PetriNetUnfolder]: 107/809 cut-off events. [2023-09-01 05:02:20,235 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-09-01 05:02:20,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:02:20,235 INFO L208 CegarLoopForPetriNet]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:02:20,236 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:02:20,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:02:20,236 INFO L85 PathProgramCache]: Analyzing trace with hash 596187427, now seen corresponding path program 1 times [2023-09-01 05:02:20,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:02:20,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501698019] [2023-09-01 05:02:20,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:02:20,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:02:20,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:02:20,289 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:02:20,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:02:20,321 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:02:20,322 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:02:20,324 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:02:20,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-09-01 05:02:20,324 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:02:20,324 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:02:20,324 WARN L233 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:02:20,324 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2023-09-01 05:02:20,480 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:02:20,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1764 places, 1897 transitions, 4231 flow [2023-09-01 05:02:21,880 INFO L130 PetriNetUnfolder]: 191/2123 cut-off events. [2023-09-01 05:02:21,881 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-09-01 05:02:22,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2371 conditions, 2123 events. 191/2123 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 11858 event pairs, 0 based on Foata normal form. 0/1722 useless extension candidates. Maximal degree in co-relation 2219. Up to 40 conditions per place. [2023-09-01 05:02:22,050 INFO L82 GeneralOperation]: Start removeDead. Operand has 1764 places, 1897 transitions, 4231 flow [2023-09-01 05:02:22,087 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1764 places, 1897 transitions, 4231 flow [2023-09-01 05:02:22,087 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:02:22,088 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1764 places, 1897 transitions, 4231 flow [2023-09-01 05:02:22,088 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1764 places, 1897 transitions, 4231 flow [2023-09-01 05:02:22,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1764 places, 1897 transitions, 4231 flow [2023-09-01 05:02:23,678 INFO L130 PetriNetUnfolder]: 191/2123 cut-off events. [2023-09-01 05:02:23,679 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-09-01 05:02:23,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2371 conditions, 2123 events. 191/2123 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 11858 event pairs, 0 based on Foata normal form. 0/1722 useless extension candidates. Maximal degree in co-relation 2219. Up to 40 conditions per place. [2023-09-01 05:02:24,251 INFO L119 LiptonReduction]: Number of co-enabled transitions 3298970 [2023-09-01 05:02:55,150 INFO L134 LiptonReduction]: Checked pairs total: 9540040 [2023-09-01 05:02:55,150 INFO L136 LiptonReduction]: Total number of compositions: 1435 [2023-09-01 05:02:55,153 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:02:55,157 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;@45dbd80a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:02:55,157 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:02:55,360 INFO L130 PetriNetUnfolder]: 114/856 cut-off events. [2023-09-01 05:02:55,360 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-09-01 05:02:55,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:02:55,360 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:02:55,361 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:02:55,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:02:55,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1028835156, now seen corresponding path program 1 times [2023-09-01 05:02:55,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:02:55,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723964783] [2023-09-01 05:02:55,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:02:55,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:02:55,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:02:55,467 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:02:55,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:02:55,523 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:02:55,536 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:02:55,537 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:02:55,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-09-01 05:02:55,537 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:02:55,538 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:02:55,538 WARN L233 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:02:55,538 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2023-09-01 05:02:55,679 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:02:55,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1855 places, 1995 transitions, 4470 flow [2023-09-01 05:02:57,366 INFO L130 PetriNetUnfolder]: 201/2233 cut-off events. [2023-09-01 05:02:57,366 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-09-01 05:02:57,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2504 conditions, 2233 events. 201/2233 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 12565 event pairs, 0 based on Foata normal form. 0/1811 useless extension candidates. Maximal degree in co-relation 2351. Up to 42 conditions per place. [2023-09-01 05:02:57,514 INFO L82 GeneralOperation]: Start removeDead. Operand has 1855 places, 1995 transitions, 4470 flow [2023-09-01 05:02:57,545 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1855 places, 1995 transitions, 4470 flow [2023-09-01 05:02:57,545 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:02:57,545 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1855 places, 1995 transitions, 4470 flow [2023-09-01 05:02:57,545 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1855 places, 1995 transitions, 4470 flow [2023-09-01 05:02:57,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1855 places, 1995 transitions, 4470 flow [2023-09-01 05:02:59,084 INFO L130 PetriNetUnfolder]: 201/2233 cut-off events. [2023-09-01 05:02:59,085 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-09-01 05:02:59,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2504 conditions, 2233 events. 201/2233 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 12565 event pairs, 0 based on Foata normal form. 0/1811 useless extension candidates. Maximal degree in co-relation 2351. Up to 42 conditions per place. [2023-09-01 05:02:59,966 INFO L119 LiptonReduction]: Number of co-enabled transitions 3662720 [2023-09-01 05:03:31,697 INFO L134 LiptonReduction]: Checked pairs total: 11839149 [2023-09-01 05:03:31,698 INFO L136 LiptonReduction]: Total number of compositions: 1520 [2023-09-01 05:03:31,700 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:03:31,700 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=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;@45dbd80a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:03:31,701 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:03:31,924 INFO L130 PetriNetUnfolder]: 120/906 cut-off events. [2023-09-01 05:03:31,924 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-09-01 05:03:31,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:03:31,925 INFO L208 CegarLoopForPetriNet]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:03:31,925 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:03:31,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:03:31,925 INFO L85 PathProgramCache]: Analyzing trace with hash -2093940908, now seen corresponding path program 1 times [2023-09-01 05:03:31,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:03:31,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117362179] [2023-09-01 05:03:31,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:03:31,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:03:31,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:03:31,963 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:03:31,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:03:32,017 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:03:32,017 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:03:32,017 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:03:32,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-09-01 05:03:32,018 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:03:32,019 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:03:32,019 WARN L233 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:03:32,019 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2023-09-01 05:03:32,169 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:03:32,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1946 places, 2093 transitions, 4711 flow [2023-09-01 05:03:34,093 INFO L130 PetriNetUnfolder]: 211/2343 cut-off events. [2023-09-01 05:03:34,093 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-09-01 05:03:34,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2638 conditions, 2343 events. 211/2343 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 13237 event pairs, 0 based on Foata normal form. 0/1900 useless extension candidates. Maximal degree in co-relation 2484. Up to 44 conditions per place. [2023-09-01 05:03:34,210 INFO L82 GeneralOperation]: Start removeDead. Operand has 1946 places, 2093 transitions, 4711 flow [2023-09-01 05:03:34,240 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1946 places, 2093 transitions, 4711 flow [2023-09-01 05:03:34,241 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:03:34,241 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1946 places, 2093 transitions, 4711 flow [2023-09-01 05:03:34,241 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1946 places, 2093 transitions, 4711 flow [2023-09-01 05:03:34,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1946 places, 2093 transitions, 4711 flow [2023-09-01 05:03:35,929 INFO L130 PetriNetUnfolder]: 211/2343 cut-off events. [2023-09-01 05:03:35,929 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-09-01 05:03:36,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2638 conditions, 2343 events. 211/2343 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 13237 event pairs, 0 based on Foata normal form. 0/1900 useless extension candidates. Maximal degree in co-relation 2484. Up to 44 conditions per place. [2023-09-01 05:03:36,848 INFO L119 LiptonReduction]: Number of co-enabled transitions 4045482 [2023-09-01 05:04:07,390 INFO L134 LiptonReduction]: Checked pairs total: 13079904 [2023-09-01 05:04:07,390 INFO L136 LiptonReduction]: Total number of compositions: 1577 [2023-09-01 05:04:07,392 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:04:07,392 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;@45dbd80a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:04:07,392 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:04:07,668 INFO L130 PetriNetUnfolder]: 128/961 cut-off events. [2023-09-01 05:04:07,668 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-09-01 05:04:07,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:04:07,669 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:04:07,669 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:04:07,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:04:07,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1413707704, now seen corresponding path program 1 times [2023-09-01 05:04:07,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:04:07,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851281874] [2023-09-01 05:04:07,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:04:07,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:04:07,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:04:07,723 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:04:07,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:04:07,762 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:04:07,763 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:04:07,763 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:04:07,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-09-01 05:04:07,763 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:04:07,763 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:04:07,763 WARN L233 ceAbstractionStarter]: 21 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:04:07,763 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 22 thread instances. [2023-09-01 05:04:07,996 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:04:08,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2037 places, 2191 transitions, 4954 flow [2023-09-01 05:04:10,057 INFO L130 PetriNetUnfolder]: 221/2453 cut-off events. [2023-09-01 05:04:10,057 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-09-01 05:04:10,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2773 conditions, 2453 events. 221/2453 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 13918 event pairs, 0 based on Foata normal form. 0/1989 useless extension candidates. Maximal degree in co-relation 2618. Up to 46 conditions per place. [2023-09-01 05:04:10,200 INFO L82 GeneralOperation]: Start removeDead. Operand has 2037 places, 2191 transitions, 4954 flow [2023-09-01 05:04:10,300 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2037 places, 2191 transitions, 4954 flow [2023-09-01 05:04:10,301 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:04:10,301 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2037 places, 2191 transitions, 4954 flow [2023-09-01 05:04:10,301 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2037 places, 2191 transitions, 4954 flow [2023-09-01 05:04:10,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2037 places, 2191 transitions, 4954 flow [2023-09-01 05:04:12,072 INFO L130 PetriNetUnfolder]: 221/2453 cut-off events. [2023-09-01 05:04:12,073 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-09-01 05:04:12,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2773 conditions, 2453 events. 221/2453 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 13918 event pairs, 0 based on Foata normal form. 0/1989 useless extension candidates. Maximal degree in co-relation 2618. Up to 46 conditions per place. [2023-09-01 05:04:13,071 INFO L119 LiptonReduction]: Number of co-enabled transitions 4447256 [2023-09-01 05:04:46,345 INFO L134 LiptonReduction]: Checked pairs total: 14441192 [2023-09-01 05:04:46,345 INFO L136 LiptonReduction]: Total number of compositions: 1659 [2023-09-01 05:04:46,347 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:04:46,347 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;@45dbd80a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:04:46,347 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:04:46,684 INFO L130 PetriNetUnfolder]: 135/1007 cut-off events. [2023-09-01 05:04:46,684 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-09-01 05:04:46,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:04:46,685 INFO L208 CegarLoopForPetriNet]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:04:46,685 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:04:46,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:04:46,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1769364969, now seen corresponding path program 1 times [2023-09-01 05:04:46,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:04:46,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267986608] [2023-09-01 05:04:46,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:04:46,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:04:46,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:04:46,740 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:04:46,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:04:46,782 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:04:46,783 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:04:46,783 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:04:46,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-09-01 05:04:46,783 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:04:46,784 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:04:46,784 WARN L233 ceAbstractionStarter]: 22 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:04:46,784 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 23 thread instances. [2023-09-01 05:04:47,053 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:04:47,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2128 places, 2289 transitions, 5199 flow [2023-09-01 05:04:49,624 INFO L130 PetriNetUnfolder]: 231/2563 cut-off events. [2023-09-01 05:04:49,625 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-09-01 05:04:49,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2909 conditions, 2563 events. 231/2563 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 14576 event pairs, 0 based on Foata normal form. 0/2078 useless extension candidates. Maximal degree in co-relation 2753. Up to 48 conditions per place. [2023-09-01 05:04:49,850 INFO L82 GeneralOperation]: Start removeDead. Operand has 2128 places, 2289 transitions, 5199 flow [2023-09-01 05:04:49,907 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2128 places, 2289 transitions, 5199 flow [2023-09-01 05:04:49,907 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:04:49,907 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2128 places, 2289 transitions, 5199 flow [2023-09-01 05:04:49,908 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2128 places, 2289 transitions, 5199 flow [2023-09-01 05:04:49,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2128 places, 2289 transitions, 5199 flow [2023-09-01 05:04:52,244 INFO L130 PetriNetUnfolder]: 231/2563 cut-off events. [2023-09-01 05:04:52,245 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-09-01 05:04:52,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2909 conditions, 2563 events. 231/2563 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 14576 event pairs, 0 based on Foata normal form. 0/2078 useless extension candidates. Maximal degree in co-relation 2753. Up to 48 conditions per place. [2023-09-01 05:04:53,402 INFO L119 LiptonReduction]: Number of co-enabled transitions 4868042 [2023-09-01 05:05:33,435 INFO L134 LiptonReduction]: Checked pairs total: 15654079 [2023-09-01 05:05:33,435 INFO L136 LiptonReduction]: Total number of compositions: 1731 [2023-09-01 05:05:33,437 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:05:33,437 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;@45dbd80a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:05:33,437 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:05:33,776 INFO L130 PetriNetUnfolder]: 141/1057 cut-off events. [2023-09-01 05:05:33,776 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-09-01 05:05:33,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:05:33,777 INFO L208 CegarLoopForPetriNet]: trace histogram [24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:05:33,777 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:05:33,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:05:33,777 INFO L85 PathProgramCache]: Analyzing trace with hash -186076379, now seen corresponding path program 1 times [2023-09-01 05:05:33,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:05:33,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777075336] [2023-09-01 05:05:33,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:05:33,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:05:33,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:05:33,846 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:05:33,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:05:33,882 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:05:33,882 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:05:33,882 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:05:33,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-09-01 05:05:33,882 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:05:33,883 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:05:33,883 WARN L233 ceAbstractionStarter]: 23 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:05:33,883 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 24 thread instances. [2023-09-01 05:05:34,183 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:05:34,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2219 places, 2387 transitions, 5446 flow [2023-09-01 05:05:36,508 INFO L130 PetriNetUnfolder]: 241/2673 cut-off events. [2023-09-01 05:05:36,508 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-09-01 05:05:36,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3046 conditions, 2673 events. 241/2673 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 15285 event pairs, 0 based on Foata normal form. 0/2167 useless extension candidates. Maximal degree in co-relation 2889. Up to 50 conditions per place. [2023-09-01 05:05:36,650 INFO L82 GeneralOperation]: Start removeDead. Operand has 2219 places, 2387 transitions, 5446 flow [2023-09-01 05:05:36,687 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2219 places, 2387 transitions, 5446 flow [2023-09-01 05:05:36,688 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:05:36,688 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2219 places, 2387 transitions, 5446 flow [2023-09-01 05:05:36,688 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2219 places, 2387 transitions, 5446 flow [2023-09-01 05:05:36,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2219 places, 2387 transitions, 5446 flow [2023-09-01 05:05:38,755 INFO L130 PetriNetUnfolder]: 241/2673 cut-off events. [2023-09-01 05:05:38,755 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-09-01 05:05:38,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3046 conditions, 2673 events. 241/2673 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 15285 event pairs, 0 based on Foata normal form. 0/2167 useless extension candidates. Maximal degree in co-relation 2889. Up to 50 conditions per place. [2023-09-01 05:05:39,934 INFO L119 LiptonReduction]: Number of co-enabled transitions 5307840 [2023-09-01 05:06:17,691 INFO L134 LiptonReduction]: Checked pairs total: 15443251 [2023-09-01 05:06:17,691 INFO L136 LiptonReduction]: Total number of compositions: 1811 [2023-09-01 05:06:17,693 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:06:17,694 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;@45dbd80a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:06:17,694 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:06:18,209 INFO L130 PetriNetUnfolder]: 149/1104 cut-off events. [2023-09-01 05:06:18,209 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-09-01 05:06:18,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:06:18,209 INFO L208 CegarLoopForPetriNet]: trace histogram [25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:06:18,210 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:06:18,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:06:18,210 INFO L85 PathProgramCache]: Analyzing trace with hash 2030743746, now seen corresponding path program 1 times [2023-09-01 05:06:18,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:06:18,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128030083] [2023-09-01 05:06:18,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:06:18,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:06:18,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:06:18,282 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:06:18,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:06:18,340 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:06:18,340 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:06:18,340 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:06:18,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-09-01 05:06:18,341 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:06:18,341 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:06:18,341 WARN L233 ceAbstractionStarter]: 24 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:06:18,341 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 25 thread instances. [2023-09-01 05:06:18,583 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:06:18,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2310 places, 2485 transitions, 5695 flow [2023-09-01 05:06:21,791 INFO L130 PetriNetUnfolder]: 251/2783 cut-off events. [2023-09-01 05:06:21,792 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-09-01 05:06:22,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3184 conditions, 2783 events. 251/2783 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 15953 event pairs, 0 based on Foata normal form. 0/2256 useless extension candidates. Maximal degree in co-relation 3026. Up to 52 conditions per place. [2023-09-01 05:06:22,061 INFO L82 GeneralOperation]: Start removeDead. Operand has 2310 places, 2485 transitions, 5695 flow [2023-09-01 05:06:22,127 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2310 places, 2485 transitions, 5695 flow [2023-09-01 05:06:22,127 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:06:22,127 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2310 places, 2485 transitions, 5695 flow [2023-09-01 05:06:22,128 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2310 places, 2485 transitions, 5695 flow [2023-09-01 05:06:22,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2310 places, 2485 transitions, 5695 flow [2023-09-01 05:06:25,305 INFO L130 PetriNetUnfolder]: 251/2783 cut-off events. [2023-09-01 05:06:25,306 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-09-01 05:06:25,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3184 conditions, 2783 events. 251/2783 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 15953 event pairs, 0 based on Foata normal form. 0/2256 useless extension candidates. Maximal degree in co-relation 3026. Up to 52 conditions per place. [2023-09-01 05:06:26,625 INFO L119 LiptonReduction]: Number of co-enabled transitions 5766650 [2023-09-01 05:07:08,381 INFO L134 LiptonReduction]: Checked pairs total: 16677977 [2023-09-01 05:07:08,381 INFO L136 LiptonReduction]: Total number of compositions: 1892 [2023-09-01 05:07:08,383 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:07:08,384 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;@45dbd80a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:07:08,384 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:07:08,849 INFO L130 PetriNetUnfolder]: 155/1161 cut-off events. [2023-09-01 05:07:08,850 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-09-01 05:07:08,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:07:08,850 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 05:07:08,850 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:07:08,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:07:08,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1740100242, now seen corresponding path program 1 times [2023-09-01 05:07:08,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:07:08,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741996980] [2023-09-01 05:07:08,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:07:08,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:07:08,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:07:08,915 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:07:08,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:07:08,956 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:07:08,957 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:07:08,957 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:07:08,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-09-01 05:07:08,957 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:07:08,957 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:07:08,957 WARN L233 ceAbstractionStarter]: 25 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:07:08,958 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 26 thread instances. [2023-09-01 05:07:09,145 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:07:09,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2401 places, 2583 transitions, 5946 flow [2023-09-01 05:07:12,011 INFO L130 PetriNetUnfolder]: 261/2893 cut-off events. [2023-09-01 05:07:12,011 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-09-01 05:07:12,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3323 conditions, 2893 events. 261/2893 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 16612 event pairs, 0 based on Foata normal form. 0/2345 useless extension candidates. Maximal degree in co-relation 3164. Up to 54 conditions per place. [2023-09-01 05:07:12,306 INFO L82 GeneralOperation]: Start removeDead. Operand has 2401 places, 2583 transitions, 5946 flow [2023-09-01 05:07:12,374 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2401 places, 2583 transitions, 5946 flow [2023-09-01 05:07:12,375 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:07:12,375 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2401 places, 2583 transitions, 5946 flow [2023-09-01 05:07:12,375 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2401 places, 2583 transitions, 5946 flow [2023-09-01 05:07:12,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2401 places, 2583 transitions, 5946 flow [2023-09-01 05:07:15,576 INFO L130 PetriNetUnfolder]: 261/2893 cut-off events. [2023-09-01 05:07:15,576 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-09-01 05:07:15,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3323 conditions, 2893 events. 261/2893 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 16612 event pairs, 0 based on Foata normal form. 0/2345 useless extension candidates. Maximal degree in co-relation 3164. Up to 54 conditions per place. [2023-09-01 05:07:16,817 INFO L119 LiptonReduction]: Number of co-enabled transitions 6244472 [2023-09-01 05:07:59,678 INFO L134 LiptonReduction]: Checked pairs total: 18062103 [2023-09-01 05:07:59,678 INFO L136 LiptonReduction]: Total number of compositions: 1964 [2023-09-01 05:07:59,681 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:07:59,682 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;@45dbd80a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:07:59,685 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:08:00,304 INFO L130 PetriNetUnfolder]: 162/1203 cut-off events. [2023-09-01 05:08:00,310 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-09-01 05:08:00,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:08:00,310 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 05:08:00,310 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:08:00,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:08:00,311 INFO L85 PathProgramCache]: Analyzing trace with hash 243896225, now seen corresponding path program 1 times [2023-09-01 05:08:00,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:08:00,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120965569] [2023-09-01 05:08:00,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:08:00,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:08:00,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:08:00,384 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:08:00,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:08:00,446 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:08:00,446 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:08:00,446 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:08:00,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-09-01 05:08:00,446 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:08:00,447 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:08:00,447 WARN L233 ceAbstractionStarter]: 26 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:08:00,447 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 27 thread instances. [2023-09-01 05:08:00,666 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:08:00,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2492 places, 2681 transitions, 6199 flow [2023-09-01 05:08:03,731 INFO L130 PetriNetUnfolder]: 271/3003 cut-off events. [2023-09-01 05:08:03,731 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-09-01 05:08:03,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3463 conditions, 3003 events. 271/3003 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 17327 event pairs, 0 based on Foata normal form. 0/2434 useless extension candidates. Maximal degree in co-relation 3303. Up to 56 conditions per place. [2023-09-01 05:08:03,928 INFO L82 GeneralOperation]: Start removeDead. Operand has 2492 places, 2681 transitions, 6199 flow [2023-09-01 05:08:03,977 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2492 places, 2681 transitions, 6199 flow [2023-09-01 05:08:03,977 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:08:03,977 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2492 places, 2681 transitions, 6199 flow [2023-09-01 05:08:03,977 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2492 places, 2681 transitions, 6199 flow [2023-09-01 05:08:03,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2492 places, 2681 transitions, 6199 flow [2023-09-01 05:08:06,678 INFO L130 PetriNetUnfolder]: 271/3003 cut-off events. [2023-09-01 05:08:06,678 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-09-01 05:08:06,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3463 conditions, 3003 events. 271/3003 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 17327 event pairs, 0 based on Foata normal form. 0/2434 useless extension candidates. Maximal degree in co-relation 3303. Up to 56 conditions per place. [2023-09-01 05:08:08,248 INFO L119 LiptonReduction]: Number of co-enabled transitions 6741306 [2023-09-01 05:08:54,976 INFO L134 LiptonReduction]: Checked pairs total: 19584800 [2023-09-01 05:08:54,977 INFO L136 LiptonReduction]: Total number of compositions: 2037 [2023-09-01 05:08:54,978 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:08:54,978 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;@45dbd80a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:08:54,979 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:08:55,514 INFO L130 PetriNetUnfolder]: 170/1259 cut-off events. [2023-09-01 05:08:55,515 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-09-01 05:08:55,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:08:55,515 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 05:08:55,515 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:08:55,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:08:55,516 INFO L85 PathProgramCache]: Analyzing trace with hash 146249023, now seen corresponding path program 1 times [2023-09-01 05:08:55,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:08:55,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30659333] [2023-09-01 05:08:55,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:08:55,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:08:55,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:08:55,593 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:08:55,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:08:55,674 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:08:55,675 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:08:55,675 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:08:55,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-09-01 05:08:55,675 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:08:55,676 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:08:55,676 WARN L233 ceAbstractionStarter]: 27 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:08:55,676 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 28 thread instances. [2023-09-01 05:08:55,953 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:08:55,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2583 places, 2779 transitions, 6454 flow [2023-09-01 05:08:59,028 INFO L130 PetriNetUnfolder]: 281/3113 cut-off events. [2023-09-01 05:08:59,029 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-09-01 05:08:59,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3604 conditions, 3113 events. 281/3113 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 18054 event pairs, 0 based on Foata normal form. 0/2523 useless extension candidates. Maximal degree in co-relation 3443. Up to 58 conditions per place. [2023-09-01 05:08:59,280 INFO L82 GeneralOperation]: Start removeDead. Operand has 2583 places, 2779 transitions, 6454 flow [2023-09-01 05:08:59,345 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2583 places, 2779 transitions, 6454 flow [2023-09-01 05:08:59,345 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:08:59,345 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2583 places, 2779 transitions, 6454 flow [2023-09-01 05:08:59,346 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2583 places, 2779 transitions, 6454 flow [2023-09-01 05:08:59,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2583 places, 2779 transitions, 6454 flow [2023-09-01 05:09:02,486 INFO L130 PetriNetUnfolder]: 281/3113 cut-off events. [2023-09-01 05:09:02,486 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-09-01 05:09:02,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3604 conditions, 3113 events. 281/3113 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 18054 event pairs, 0 based on Foata normal form. 0/2523 useless extension candidates. Maximal degree in co-relation 3443. Up to 58 conditions per place. [2023-09-01 05:09:04,120 INFO L119 LiptonReduction]: Number of co-enabled transitions 7257152 [2023-09-01 05:09:50,643 INFO L134 LiptonReduction]: Checked pairs total: 23545200 [2023-09-01 05:09:50,644 INFO L136 LiptonReduction]: Total number of compositions: 2101 [2023-09-01 05:09:50,655 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:09:50,658 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;@45dbd80a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:09:50,658 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:09:51,254 INFO L130 PetriNetUnfolder]: 176/1304 cut-off events. [2023-09-01 05:09:51,254 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-09-01 05:09:51,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:09:51,254 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 05:09:51,254 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:09:51,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:09:51,255 INFO L85 PathProgramCache]: Analyzing trace with hash -227580327, now seen corresponding path program 1 times [2023-09-01 05:09:51,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:09:51,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795601159] [2023-09-01 05:09:51,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:09:51,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:09:51,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:09:51,377 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:09:51,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:09:51,424 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:09:51,424 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:09:51,424 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:09:51,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-09-01 05:09:51,425 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:09:51,425 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:09:51,425 WARN L233 ceAbstractionStarter]: 28 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:09:51,425 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 29 thread instances. [2023-09-01 05:09:51,691 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:09:51,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2674 places, 2877 transitions, 6711 flow [2023-09-01 05:09:55,207 INFO L130 PetriNetUnfolder]: 291/3223 cut-off events. [2023-09-01 05:09:55,207 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-09-01 05:09:55,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3746 conditions, 3223 events. 291/3223 cut-off events. For 4466/4466 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 18700 event pairs, 0 based on Foata normal form. 0/2612 useless extension candidates. Maximal degree in co-relation 3584. Up to 60 conditions per place. [2023-09-01 05:09:55,440 INFO L82 GeneralOperation]: Start removeDead. Operand has 2674 places, 2877 transitions, 6711 flow [2023-09-01 05:09:55,497 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2674 places, 2877 transitions, 6711 flow [2023-09-01 05:09:55,498 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:09:55,498 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2674 places, 2877 transitions, 6711 flow [2023-09-01 05:09:55,498 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2674 places, 2877 transitions, 6711 flow [2023-09-01 05:09:55,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2674 places, 2877 transitions, 6711 flow [2023-09-01 05:09:58,778 INFO L130 PetriNetUnfolder]: 291/3223 cut-off events. [2023-09-01 05:09:58,778 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-09-01 05:09:59,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3746 conditions, 3223 events. 291/3223 cut-off events. For 4466/4466 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 18700 event pairs, 0 based on Foata normal form. 0/2612 useless extension candidates. Maximal degree in co-relation 3584. Up to 60 conditions per place. [2023-09-01 05:10:00,569 INFO L119 LiptonReduction]: Number of co-enabled transitions 7792010 [2023-09-01 05:10:50,598 INFO L134 LiptonReduction]: Checked pairs total: 22482579 [2023-09-01 05:10:50,599 INFO L136 LiptonReduction]: Total number of compositions: 2180 [2023-09-01 05:10:50,606 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:10:50,607 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;@45dbd80a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:10:50,607 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:10:51,266 INFO L130 PetriNetUnfolder]: 184/1363 cut-off events. [2023-09-01 05:10:51,267 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-09-01 05:10:51,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:10:51,267 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 05:10:51,267 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:10:51,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:10:51,268 INFO L85 PathProgramCache]: Analyzing trace with hash 16284037, now seen corresponding path program 1 times [2023-09-01 05:10:51,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:10:51,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828228150] [2023-09-01 05:10:51,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:10:51,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:10:51,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:10:51,353 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:10:51,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:10:51,418 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:10:51,419 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:10:51,419 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:10:51,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-09-01 05:10:51,419 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:10:51,420 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:10:51,420 WARN L233 ceAbstractionStarter]: 29 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:10:51,420 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 30 thread instances. [2023-09-01 05:10:51,723 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:10:51,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2765 places, 2975 transitions, 6970 flow [2023-09-01 05:10:55,898 INFO L130 PetriNetUnfolder]: 301/3333 cut-off events. [2023-09-01 05:10:55,898 INFO L131 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2023-09-01 05:10:56,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3889 conditions, 3333 events. 301/3333 cut-off events. For 4930/4930 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 19447 event pairs, 0 based on Foata normal form. 0/2701 useless extension candidates. Maximal degree in co-relation 3726. Up to 62 conditions per place. [2023-09-01 05:10:56,164 INFO L82 GeneralOperation]: Start removeDead. Operand has 2765 places, 2975 transitions, 6970 flow [2023-09-01 05:10:56,229 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2765 places, 2975 transitions, 6970 flow [2023-09-01 05:10:56,230 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:10:56,230 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2765 places, 2975 transitions, 6970 flow [2023-09-01 05:10:56,230 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2765 places, 2975 transitions, 6970 flow [2023-09-01 05:10:56,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2765 places, 2975 transitions, 6970 flow [2023-09-01 05:11:00,781 INFO L130 PetriNetUnfolder]: 301/3333 cut-off events. [2023-09-01 05:11:00,781 INFO L131 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2023-09-01 05:11:01,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3889 conditions, 3333 events. 301/3333 cut-off events. For 4930/4930 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 19447 event pairs, 0 based on Foata normal form. 0/2701 useless extension candidates. Maximal degree in co-relation 3726. Up to 62 conditions per place. [2023-09-01 05:11:02,516 INFO L119 LiptonReduction]: Number of co-enabled transitions 8345880 Killed by 15