./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/29_conditionals_vs.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-ext/29_conditionals_vs.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c3f647420f42d7fdb333957b618cdd528a4c5a4cecdb35105a1a2630df70b3d6 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 16:32:20,500 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 16:32:20,502 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 16:32:20,531 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 16:32:20,532 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 16:32:20,534 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 16:32:20,536 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 16:32:20,537 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 16:32:20,539 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 16:32:20,542 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 16:32:20,543 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 16:32:20,544 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 16:32:20,544 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 16:32:20,546 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 16:32:20,546 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 16:32:20,550 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 16:32:20,551 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 16:32:20,552 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 16:32:20,553 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 16:32:20,561 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 16:32:20,562 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 16:32:20,563 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 16:32:20,563 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 16:32:20,564 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 16:32:20,568 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 16:32:20,569 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 16:32:20,569 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 16:32:20,570 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 16:32:20,570 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 16:32:20,571 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 16:32:20,571 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 16:32:20,579 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 16:32:20,580 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 16:32:20,581 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 16:32:20,581 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 16:32:20,581 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 16:32:20,582 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 16:32:20,582 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 16:32:20,582 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 16:32:20,583 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 16:32:20,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 16:32:20,584 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 16:32:20,610 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 16:32:20,610 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 16:32:20,611 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 16:32:20,611 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 16:32:20,612 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 16:32:20,612 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 16:32:20,612 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 16:32:20,613 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 16:32:20,613 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 16:32:20,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 16:32:20,613 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 16:32:20,614 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 16:32:20,614 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 16:32:20,614 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 16:32:20,614 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 16:32:20,614 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 16:32:20,614 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 16:32:20,614 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 16:32:20,615 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 16:32:20,615 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 16:32:20,615 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 16:32:20,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 16:32:20,615 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 16:32:20,615 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 16:32:20,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:32:20,616 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 16:32:20,616 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 16:32:20,616 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 16:32:20,616 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 16:32:20,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 16:32:20,616 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 16:32:20,617 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 16:32:20,617 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 16:32:20,617 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 16:32:20,617 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 16:32:20,617 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3f647420f42d7fdb333957b618cdd528a4c5a4cecdb35105a1a2630df70b3d6 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 16:32:20,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 16:32:20,850 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 16:32:20,852 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 16:32:20,853 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 16:32:20,853 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 16:32:20,854 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/29_conditionals_vs.i [2023-08-30 16:32:21,718 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 16:32:21,945 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 16:32:21,947 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/29_conditionals_vs.i [2023-08-30 16:32:21,957 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/facc1c8f7/8cc8a978ae844a14a2f74eece595d84b/FLAGb2eec08b2 [2023-08-30 16:32:21,972 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/facc1c8f7/8cc8a978ae844a14a2f74eece595d84b [2023-08-30 16:32:21,975 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 16:32:21,976 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 16:32:21,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 16:32:21,978 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 16:32:21,980 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 16:32:21,980 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:32:21" (1/1) ... [2023-08-30 16:32:21,981 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1068c6da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:21, skipping insertion in model container [2023-08-30 16:32:21,981 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:32:21" (1/1) ... [2023-08-30 16:32:21,985 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 16:32:22,021 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 16:32:22,255 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/29_conditionals_vs.i[30422,30435] [2023-08-30 16:32:22,263 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:32:22,270 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 16:32:22,298 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/29_conditionals_vs.i[30422,30435] [2023-08-30 16:32:22,299 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:32:22,322 INFO L208 MainTranslator]: Completed translation [2023-08-30 16:32:22,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:22 WrapperNode [2023-08-30 16:32:22,322 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 16:32:22,323 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 16:32:22,323 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 16:32:22,323 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 16:32:22,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:22" (1/1) ... [2023-08-30 16:32:22,338 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:22" (1/1) ... [2023-08-30 16:32:22,351 INFO L138 Inliner]: procedures = 170, calls = 14, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 61 [2023-08-30 16:32:22,351 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 16:32:22,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 16:32:22,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 16:32:22,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 16:32:22,357 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:22" (1/1) ... [2023-08-30 16:32:22,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:22" (1/1) ... [2023-08-30 16:32:22,363 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:22" (1/1) ... [2023-08-30 16:32:22,363 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:22" (1/1) ... [2023-08-30 16:32:22,384 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:22" (1/1) ... [2023-08-30 16:32:22,387 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:22" (1/1) ... [2023-08-30 16:32:22,388 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:22" (1/1) ... [2023-08-30 16:32:22,404 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:22" (1/1) ... [2023-08-30 16:32:22,406 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 16:32:22,406 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 16:32:22,406 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 16:32:22,406 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 16:32:22,407 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:22" (1/1) ... [2023-08-30 16:32:22,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:32:22,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:32:22,442 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 16:32:22,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 16:32:22,470 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-30 16:32:22,470 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-30 16:32:22,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 16:32:22,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 16:32:22,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 16:32:22,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 16:32:22,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 16:32:22,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 16:32:22,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 16:32:22,473 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 16:32:22,607 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 16:32:22,608 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 16:32:22,744 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 16:32:22,762 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 16:32:22,762 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-30 16:32:22,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:32:22 BoogieIcfgContainer [2023-08-30 16:32:22,764 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 16:32:22,765 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 16:32:22,765 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 16:32:22,767 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 16:32:22,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:32:21" (1/3) ... [2023-08-30 16:32:22,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e7eec5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:32:22, skipping insertion in model container [2023-08-30 16:32:22,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:32:22" (2/3) ... [2023-08-30 16:32:22,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e7eec5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:32:22, skipping insertion in model container [2023-08-30 16:32:22,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:32:22" (3/3) ... [2023-08-30 16:32:22,769 INFO L112 eAbstractionObserver]: Analyzing ICFG 29_conditionals_vs.i [2023-08-30 16:32:22,774 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 16:32:22,780 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 16:32:22,780 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 16:32:22,780 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 16:32:22,829 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:32:22,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 54 transitions, 113 flow [2023-08-30 16:32:22,890 INFO L130 PetriNetUnfolder]: 6/64 cut-off events. [2023-08-30 16:32:22,893 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:32:22,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 64 events. 6/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 61 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 41. Up to 4 conditions per place. [2023-08-30 16:32:22,898 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 54 transitions, 113 flow [2023-08-30 16:32:22,902 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 54 transitions, 113 flow [2023-08-30 16:32:22,904 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:32:22,913 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 52 places, 54 transitions, 113 flow [2023-08-30 16:32:22,916 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 52 places, 54 transitions, 113 flow [2023-08-30 16:32:22,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 54 transitions, 113 flow [2023-08-30 16:32:22,939 INFO L130 PetriNetUnfolder]: 6/64 cut-off events. [2023-08-30 16:32:22,939 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:32:22,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 64 events. 6/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 61 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 41. Up to 4 conditions per place. [2023-08-30 16:32:22,941 INFO L119 LiptonReduction]: Number of co-enabled transitions 754 [2023-08-30 16:32:24,396 INFO L134 LiptonReduction]: Checked pairs total: 611 [2023-08-30 16:32:24,396 INFO L136 LiptonReduction]: Total number of compositions: 54 [2023-08-30 16:32:24,405 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:32:24,408 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;@3e9dfda3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:32:24,409 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-30 16:32:24,410 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-30 16:32:24,411 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:32:24,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:32:24,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 16:32:24,411 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:32:24,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:32:24,415 INFO L85 PathProgramCache]: Analyzing trace with hash 8574729, now seen corresponding path program 1 times [2023-08-30 16:32:24,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:32:24,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849597850] [2023-08-30 16:32:24,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:32:24,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:32:24,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:32:24,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:32:24,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:32:24,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849597850] [2023-08-30 16:32:24,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849597850] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:32:24,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:32:24,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 16:32:24,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679690530] [2023-08-30 16:32:24,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:32:24,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 16:32:24,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:32:24,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 16:32:24,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 16:32:24,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 108 [2023-08-30 16:32:24,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 21 flow. Second operand has 2 states, 2 states have (on average 49.0) internal successors, (98), 2 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:24,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:32:24,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 108 [2023-08-30 16:32:24,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:32:24,592 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2023-08-30 16:32:24,592 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:32:24,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 12 events. 2/12 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 2 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 14. Up to 11 conditions per place. [2023-08-30 16:32:24,593 INFO L137 encePairwiseOnDemand]: 106/108 looper letters, 0 selfloop transitions, 0 changer transitions 6/6 dead transitions. [2023-08-30 16:32:24,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 6 transitions, 27 flow [2023-08-30 16:32:24,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 16:32:24,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 16:32:24,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 101 transitions. [2023-08-30 16:32:24,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675925925925926 [2023-08-30 16:32:24,603 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 101 transitions. [2023-08-30 16:32:24,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 101 transitions. [2023-08-30 16:32:24,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:32:24,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 101 transitions. [2023-08-30 16:32:24,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 50.5) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:24,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:24,612 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:24,613 INFO L175 Difference]: Start difference. First operand has 11 places, 8 transitions, 21 flow. Second operand 2 states and 101 transitions. [2023-08-30 16:32:24,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 6 transitions, 27 flow [2023-08-30 16:32:24,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 6 transitions, 27 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 16:32:24,616 INFO L231 Difference]: Finished difference. Result has 10 places, 0 transitions, 0 flow [2023-08-30 16:32:24,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=0, PETRI_PLACES=10, PETRI_TRANSITIONS=0} [2023-08-30 16:32:24,620 INFO L281 CegarLoopForPetriNet]: 11 programPoint places, -1 predicate places. [2023-08-30 16:32:24,620 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 0 transitions, 0 flow [2023-08-30 16:32:24,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 49.0) internal successors, (98), 2 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:24,623 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-08-30 16:32:24,624 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-30 16:32:24,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 16:32:24,624 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:32:24,632 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE (1/2) [2023-08-30 16:32:24,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 54 transitions, 113 flow [2023-08-30 16:32:24,648 INFO L130 PetriNetUnfolder]: 6/64 cut-off events. [2023-08-30 16:32:24,649 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:32:24,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 64 events. 6/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 61 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 41. Up to 4 conditions per place. [2023-08-30 16:32:24,651 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 54 transitions, 113 flow [2023-08-30 16:32:24,653 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 54 transitions, 113 flow [2023-08-30 16:32:24,653 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:32:24,653 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 52 places, 54 transitions, 113 flow [2023-08-30 16:32:24,654 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 52 places, 54 transitions, 113 flow [2023-08-30 16:32:24,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 54 transitions, 113 flow [2023-08-30 16:32:24,669 INFO L130 PetriNetUnfolder]: 6/64 cut-off events. [2023-08-30 16:32:24,669 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:32:24,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 64 events. 6/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 61 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 41. Up to 4 conditions per place. [2023-08-30 16:32:24,671 INFO L119 LiptonReduction]: Number of co-enabled transitions 754 [2023-08-30 16:32:26,007 INFO L134 LiptonReduction]: Checked pairs total: 600 [2023-08-30 16:32:26,007 INFO L136 LiptonReduction]: Total number of compositions: 56 [2023-08-30 16:32:26,008 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 16:32:26,009 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;@3e9dfda3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:32:26,009 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 16:32:26,010 INFO L130 PetriNetUnfolder]: 0/9 cut-off events. [2023-08-30 16:32:26,011 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:32:26,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:32:26,011 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 16:32:26,011 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:32:26,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:32:26,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1244398843, now seen corresponding path program 1 times [2023-08-30 16:32:26,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:32:26,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670419194] [2023-08-30 16:32:26,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:32:26,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:32:26,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:32:26,032 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:32:26,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:32:26,049 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:32:26,050 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:32:26,050 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 16:32:26,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 16:32:26,050 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:32:26,051 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 16:32:26,051 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 16:32:26,051 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 16:32:26,071 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:32:26,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 84 transitions, 180 flow [2023-08-30 16:32:26,081 INFO L130 PetriNetUnfolder]: 11/106 cut-off events. [2023-08-30 16:32:26,081 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:32:26,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 106 events. 11/106 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 173 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 70. Up to 6 conditions per place. [2023-08-30 16:32:26,081 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 84 transitions, 180 flow [2023-08-30 16:32:26,082 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 84 transitions, 180 flow [2023-08-30 16:32:26,082 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:32:26,082 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 84 transitions, 180 flow [2023-08-30 16:32:26,083 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 80 places, 84 transitions, 180 flow [2023-08-30 16:32:26,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 84 transitions, 180 flow [2023-08-30 16:32:26,090 INFO L130 PetriNetUnfolder]: 11/106 cut-off events. [2023-08-30 16:32:26,091 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:32:26,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 106 events. 11/106 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 173 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 70. Up to 6 conditions per place. [2023-08-30 16:32:26,093 INFO L119 LiptonReduction]: Number of co-enabled transitions 3248 [2023-08-30 16:32:27,902 INFO L134 LiptonReduction]: Checked pairs total: 2852 [2023-08-30 16:32:27,903 INFO L136 LiptonReduction]: Total number of compositions: 85 [2023-08-30 16:32:27,904 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:32:27,905 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;@3e9dfda3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:32:27,905 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 16:32:27,906 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-30 16:32:27,906 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:32:27,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:32:27,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 16:32:27,907 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:32:27,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:32:27,907 INFO L85 PathProgramCache]: Analyzing trace with hash 16382335, now seen corresponding path program 1 times [2023-08-30 16:32:27,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:32:27,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056132873] [2023-08-30 16:32:27,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:32:27,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:32:27,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:32:27,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:32:27,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:32:27,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056132873] [2023-08-30 16:32:27,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056132873] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:32:27,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:32:27,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 16:32:27,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951436282] [2023-08-30 16:32:27,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:32:27,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 16:32:27,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:32:27,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 16:32:27,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 16:32:27,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 169 [2023-08-30 16:32:27,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 40 flow. Second operand has 2 states, 2 states have (on average 74.0) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:27,929 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:32:27,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 169 [2023-08-30 16:32:27,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:32:27,946 INFO L130 PetriNetUnfolder]: 20/57 cut-off events. [2023-08-30 16:32:27,947 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 16:32:27,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 57 events. 20/57 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 163 event pairs, 20 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 28. Up to 47 conditions per place. [2023-08-30 16:32:27,947 INFO L137 encePairwiseOnDemand]: 166/169 looper letters, 0 selfloop transitions, 0 changer transitions 11/11 dead transitions. [2023-08-30 16:32:27,947 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 11 transitions, 50 flow [2023-08-30 16:32:27,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 16:32:27,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 16:32:27,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 155 transitions. [2023-08-30 16:32:27,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45857988165680474 [2023-08-30 16:32:27,949 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 155 transitions. [2023-08-30 16:32:27,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 155 transitions. [2023-08-30 16:32:27,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:32:27,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 155 transitions. [2023-08-30 16:32:27,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 77.5) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:27,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:27,951 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:27,952 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 40 flow. Second operand 2 states and 155 transitions. [2023-08-30 16:32:27,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 11 transitions, 50 flow [2023-08-30 16:32:27,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 11 transitions, 48 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 16:32:27,952 INFO L231 Difference]: Finished difference. Result has 17 places, 0 transitions, 0 flow [2023-08-30 16:32:27,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=0, PETRI_PLACES=17, PETRI_TRANSITIONS=0} [2023-08-30 16:32:27,953 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, -2 predicate places. [2023-08-30 16:32:27,953 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 0 transitions, 0 flow [2023-08-30 16:32:27,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 74.0) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:27,954 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-30 16:32:27,954 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-30 16:32:27,954 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-30 16:32:27,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 16:32:27,954 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:32:27,955 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-08-30 16:32:27,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 84 transitions, 180 flow [2023-08-30 16:32:27,962 INFO L130 PetriNetUnfolder]: 11/106 cut-off events. [2023-08-30 16:32:27,962 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:32:27,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 106 events. 11/106 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 173 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 70. Up to 6 conditions per place. [2023-08-30 16:32:27,962 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 84 transitions, 180 flow [2023-08-30 16:32:27,963 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 84 transitions, 180 flow [2023-08-30 16:32:27,963 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:32:27,963 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 84 transitions, 180 flow [2023-08-30 16:32:27,963 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 80 places, 84 transitions, 180 flow [2023-08-30 16:32:27,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 84 transitions, 180 flow [2023-08-30 16:32:27,969 INFO L130 PetriNetUnfolder]: 11/106 cut-off events. [2023-08-30 16:32:27,971 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:32:27,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 106 events. 11/106 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 173 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 70. Up to 6 conditions per place. [2023-08-30 16:32:27,972 INFO L119 LiptonReduction]: Number of co-enabled transitions 3248 [2023-08-30 16:32:29,552 INFO L134 LiptonReduction]: Checked pairs total: 2924 [2023-08-30 16:32:29,552 INFO L136 LiptonReduction]: Total number of compositions: 87 [2023-08-30 16:32:29,553 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 16:32:29,554 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;@3e9dfda3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:32:29,554 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 16:32:29,556 INFO L130 PetriNetUnfolder]: 1/21 cut-off events. [2023-08-30 16:32:29,556 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:32:29,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:32:29,556 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 16:32:29,557 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:32:29,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:32:29,557 INFO L85 PathProgramCache]: Analyzing trace with hash 946330714, now seen corresponding path program 1 times [2023-08-30 16:32:29,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:32:29,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862382545] [2023-08-30 16:32:29,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:32:29,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:32:29,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:32:29,578 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:32:29,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:32:29,588 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:32:29,588 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:32:29,588 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 16:32:29,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 16:32:29,588 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:32:29,589 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 16:32:29,589 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 16:32:29,589 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 16:32:29,600 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:32:29,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 114 transitions, 249 flow [2023-08-30 16:32:29,609 INFO L130 PetriNetUnfolder]: 16/148 cut-off events. [2023-08-30 16:32:29,612 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 16:32:29,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 148 events. 16/148 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 325 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 110. Up to 8 conditions per place. [2023-08-30 16:32:29,613 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 114 transitions, 249 flow [2023-08-30 16:32:29,614 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 114 transitions, 249 flow [2023-08-30 16:32:29,615 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:32:29,615 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 108 places, 114 transitions, 249 flow [2023-08-30 16:32:29,615 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 108 places, 114 transitions, 249 flow [2023-08-30 16:32:29,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 114 transitions, 249 flow [2023-08-30 16:32:29,625 INFO L130 PetriNetUnfolder]: 16/148 cut-off events. [2023-08-30 16:32:29,632 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 16:32:29,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 148 events. 16/148 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 325 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 110. Up to 8 conditions per place. [2023-08-30 16:32:29,636 INFO L119 LiptonReduction]: Number of co-enabled transitions 7482 [2023-08-30 16:32:31,959 INFO L134 LiptonReduction]: Checked pairs total: 7203 [2023-08-30 16:32:31,959 INFO L136 LiptonReduction]: Total number of compositions: 123 [2023-08-30 16:32:31,960 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:32:31,961 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;@3e9dfda3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:32:31,961 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 16:32:31,962 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-30 16:32:31,962 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:32:31,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:32:31,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 16:32:31,963 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 16:32:31,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:32:31,963 INFO L85 PathProgramCache]: Analyzing trace with hash 27029761, now seen corresponding path program 1 times [2023-08-30 16:32:31,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:32:31,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860528288] [2023-08-30 16:32:31,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:32:31,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:32:31,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:32:31,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:32:31,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:32:31,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860528288] [2023-08-30 16:32:31,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860528288] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:32:31,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:32:31,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 16:32:31,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875664899] [2023-08-30 16:32:31,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:32:31,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 16:32:31,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:32:31,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 16:32:31,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 16:32:31,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 237 [2023-08-30 16:32:31,982 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 57 flow. Second operand has 2 states, 2 states have (on average 99.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:31,982 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:32:31,982 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 237 [2023-08-30 16:32:31,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:32:32,015 INFO L130 PetriNetUnfolder]: 110/225 cut-off events. [2023-08-30 16:32:32,015 INFO L131 PetriNetUnfolder]: For 79/79 co-relation queries the response was YES. [2023-08-30 16:32:32,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 494 conditions, 225 events. 110/225 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 896 event pairs, 110 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 127. Up to 191 conditions per place. [2023-08-30 16:32:32,016 INFO L137 encePairwiseOnDemand]: 233/237 looper letters, 0 selfloop transitions, 0 changer transitions 14/14 dead transitions. [2023-08-30 16:32:32,016 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 14 transitions, 71 flow [2023-08-30 16:32:32,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 16:32:32,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 16:32:32,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 209 transitions. [2023-08-30 16:32:32,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409282700421941 [2023-08-30 16:32:32,018 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 209 transitions. [2023-08-30 16:32:32,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 209 transitions. [2023-08-30 16:32:32,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:32:32,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 209 transitions. [2023-08-30 16:32:32,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 104.5) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:32,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 237.0) internal successors, (711), 3 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:32,021 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 237.0) internal successors, (711), 3 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:32,021 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 57 flow. Second operand 2 states and 209 transitions. [2023-08-30 16:32:32,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 14 transitions, 71 flow [2023-08-30 16:32:32,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 14 transitions, 65 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-30 16:32:32,022 INFO L231 Difference]: Finished difference. Result has 22 places, 0 transitions, 0 flow [2023-08-30 16:32:32,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=43, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=0, PETRI_PLACES=22, PETRI_TRANSITIONS=0} [2023-08-30 16:32:32,024 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -3 predicate places. [2023-08-30 16:32:32,024 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 0 transitions, 0 flow [2023-08-30 16:32:32,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 99.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:32,024 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-30 16:32:32,024 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-30 16:32:32,026 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-30 16:32:32,026 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-30 16:32:32,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 16:32:32,026 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:32:32,027 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 16:32:32,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 114 transitions, 249 flow [2023-08-30 16:32:32,036 INFO L130 PetriNetUnfolder]: 16/148 cut-off events. [2023-08-30 16:32:32,038 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 16:32:32,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 148 events. 16/148 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 325 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 110. Up to 8 conditions per place. [2023-08-30 16:32:32,038 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 114 transitions, 249 flow [2023-08-30 16:32:32,039 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 114 transitions, 249 flow [2023-08-30 16:32:32,039 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:32:32,039 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 108 places, 114 transitions, 249 flow [2023-08-30 16:32:32,040 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 108 places, 114 transitions, 249 flow [2023-08-30 16:32:32,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 114 transitions, 249 flow [2023-08-30 16:32:32,050 INFO L130 PetriNetUnfolder]: 16/148 cut-off events. [2023-08-30 16:32:32,050 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 16:32:32,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 148 events. 16/148 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 325 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 110. Up to 8 conditions per place. [2023-08-30 16:32:32,053 INFO L119 LiptonReduction]: Number of co-enabled transitions 7482 [2023-08-30 16:32:34,419 INFO L134 LiptonReduction]: Checked pairs total: 7069 [2023-08-30 16:32:34,420 INFO L136 LiptonReduction]: Total number of compositions: 124 [2023-08-30 16:32:34,421 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 16:32:34,421 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;@3e9dfda3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:32:34,421 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 16:32:34,425 INFO L130 PetriNetUnfolder]: 1/29 cut-off events. [2023-08-30 16:32:34,426 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 16:32:34,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:32:34,426 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 16:32:34,426 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:32:34,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:32:34,426 INFO L85 PathProgramCache]: Analyzing trace with hash -708252400, now seen corresponding path program 1 times [2023-08-30 16:32:34,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:32:34,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885078263] [2023-08-30 16:32:34,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:32:34,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:32:34,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:32:34,457 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:32:34,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:32:34,469 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:32:34,469 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:32:34,470 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 16:32:34,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 16:32:34,470 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:32:34,470 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 16:32:34,471 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 16:32:34,471 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 16:32:34,497 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:32:34,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 144 transitions, 320 flow [2023-08-30 16:32:34,513 INFO L130 PetriNetUnfolder]: 21/190 cut-off events. [2023-08-30 16:32:34,518 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 16:32:34,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 190 events. 21/190 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 475 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 156. Up to 10 conditions per place. [2023-08-30 16:32:34,519 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 144 transitions, 320 flow [2023-08-30 16:32:34,520 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 144 transitions, 320 flow [2023-08-30 16:32:34,520 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:32:34,521 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 144 transitions, 320 flow [2023-08-30 16:32:34,521 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 144 transitions, 320 flow [2023-08-30 16:32:34,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 144 transitions, 320 flow [2023-08-30 16:32:34,537 INFO L130 PetriNetUnfolder]: 21/190 cut-off events. [2023-08-30 16:32:34,537 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 16:32:34,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 190 events. 21/190 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 475 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 156. Up to 10 conditions per place. [2023-08-30 16:32:34,543 INFO L119 LiptonReduction]: Number of co-enabled transitions 13456 [2023-08-30 16:32:37,247 INFO L134 LiptonReduction]: Checked pairs total: 12977 [2023-08-30 16:32:37,247 INFO L136 LiptonReduction]: Total number of compositions: 157 [2023-08-30 16:32:37,248 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:32:37,248 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;@3e9dfda3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:32:37,249 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-30 16:32:37,249 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2023-08-30 16:32:37,250 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:32:37,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:32:37,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 16:32:37,250 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 16:32:37,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:32:37,250 INFO L85 PathProgramCache]: Analyzing trace with hash 40961392, now seen corresponding path program 1 times [2023-08-30 16:32:37,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:32:37,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368283713] [2023-08-30 16:32:37,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:32:37,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:32:37,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:32:37,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:32:37,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:32:37,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368283713] [2023-08-30 16:32:37,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368283713] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:32:37,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:32:37,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 16:32:37,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421728234] [2023-08-30 16:32:37,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:32:37,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 16:32:37,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:32:37,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 16:32:37,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 16:32:37,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 301 [2023-08-30 16:32:37,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 80 flow. Second operand has 2 states, 2 states have (on average 124.0) internal successors, (248), 2 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:37,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:32:37,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 301 [2023-08-30 16:32:37,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:32:37,345 INFO L130 PetriNetUnfolder]: 488/837 cut-off events. [2023-08-30 16:32:37,345 INFO L131 PetriNetUnfolder]: For 448/448 co-relation queries the response was YES. [2023-08-30 16:32:37,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1863 conditions, 837 events. 488/837 cut-off events. For 448/448 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3901 event pairs, 488 based on Foata normal form. 0/797 useless extension candidates. Maximal degree in co-relation 511. Up to 731 conditions per place. [2023-08-30 16:32:37,366 INFO L137 encePairwiseOnDemand]: 295/301 looper letters, 0 selfloop transitions, 0 changer transitions 17/17 dead transitions. [2023-08-30 16:32:37,367 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 17 transitions, 94 flow [2023-08-30 16:32:37,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 16:32:37,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 16:32:37,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 264 transitions. [2023-08-30 16:32:37,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2023-08-30 16:32:37,371 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 264 transitions. [2023-08-30 16:32:37,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 264 transitions. [2023-08-30 16:32:37,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:32:37,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 264 transitions. [2023-08-30 16:32:37,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 132.0) internal successors, (264), 2 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:37,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 301.0) internal successors, (903), 3 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:37,374 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 301.0) internal successors, (903), 3 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:37,374 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 80 flow. Second operand 2 states and 264 transitions. [2023-08-30 16:32:37,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 17 transitions, 94 flow [2023-08-30 16:32:37,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 17 transitions, 82 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-30 16:32:37,376 INFO L231 Difference]: Finished difference. Result has 27 places, 0 transitions, 0 flow [2023-08-30 16:32:37,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=0, PETRI_PLACES=27, PETRI_TRANSITIONS=0} [2023-08-30 16:32:37,378 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -5 predicate places. [2023-08-30 16:32:37,378 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 0 transitions, 0 flow [2023-08-30 16:32:37,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 124.0) internal successors, (248), 2 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:37,379 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2023-08-30 16:32:37,379 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-30 16:32:37,379 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-30 16:32:37,379 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-30 16:32:37,379 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-30 16:32:37,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 16:32:37,379 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:32:37,380 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 16:32:37,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 144 transitions, 320 flow [2023-08-30 16:32:37,400 INFO L130 PetriNetUnfolder]: 21/190 cut-off events. [2023-08-30 16:32:37,401 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 16:32:37,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 190 events. 21/190 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 475 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 156. Up to 10 conditions per place. [2023-08-30 16:32:37,402 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 144 transitions, 320 flow [2023-08-30 16:32:37,403 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 144 transitions, 320 flow [2023-08-30 16:32:37,403 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:32:37,403 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 144 transitions, 320 flow [2023-08-30 16:32:37,403 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 144 transitions, 320 flow [2023-08-30 16:32:37,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 144 transitions, 320 flow [2023-08-30 16:32:37,419 INFO L130 PetriNetUnfolder]: 21/190 cut-off events. [2023-08-30 16:32:37,420 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 16:32:37,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 190 events. 21/190 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 475 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 156. Up to 10 conditions per place. [2023-08-30 16:32:37,426 INFO L119 LiptonReduction]: Number of co-enabled transitions 13456 [2023-08-30 16:32:40,174 INFO L134 LiptonReduction]: Checked pairs total: 12491 [2023-08-30 16:32:40,174 INFO L136 LiptonReduction]: Total number of compositions: 158 [2023-08-30 16:32:40,175 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 16:32:40,176 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;@3e9dfda3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:32:40,176 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 16:32:40,178 INFO L130 PetriNetUnfolder]: 1/37 cut-off events. [2023-08-30 16:32:40,178 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 16:32:40,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:32:40,179 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 16:32:40,179 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:32:40,179 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:32:40,179 INFO L85 PathProgramCache]: Analyzing trace with hash 185963096, now seen corresponding path program 1 times [2023-08-30 16:32:40,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:32:40,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706439438] [2023-08-30 16:32:40,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:32:40,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:32:40,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:32:40,196 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:32:40,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:32:40,209 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:32:40,212 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:32:40,212 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 16:32:40,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 16:32:40,212 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:32:40,213 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 16:32:40,213 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 16:32:40,213 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-30 16:32:40,227 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:32:40,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 174 transitions, 393 flow [2023-08-30 16:32:40,243 INFO L130 PetriNetUnfolder]: 26/232 cut-off events. [2023-08-30 16:32:40,243 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 16:32:40,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 232 events. 26/232 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 625 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 204. Up to 12 conditions per place. [2023-08-30 16:32:40,244 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 174 transitions, 393 flow [2023-08-30 16:32:40,246 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 174 transitions, 393 flow [2023-08-30 16:32:40,246 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:32:40,247 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 174 transitions, 393 flow [2023-08-30 16:32:40,247 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 174 transitions, 393 flow [2023-08-30 16:32:40,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 174 transitions, 393 flow [2023-08-30 16:32:40,261 INFO L130 PetriNetUnfolder]: 26/232 cut-off events. [2023-08-30 16:32:40,261 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 16:32:40,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 232 events. 26/232 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 625 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 204. Up to 12 conditions per place. [2023-08-30 16:32:40,266 INFO L119 LiptonReduction]: Number of co-enabled transitions 21170 [2023-08-30 16:32:43,711 INFO L134 LiptonReduction]: Checked pairs total: 21832 [2023-08-30 16:32:43,711 INFO L136 LiptonReduction]: Total number of compositions: 195 [2023-08-30 16:32:43,712 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:32:43,713 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;@3e9dfda3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:32:43,713 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-30 16:32:43,713 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2023-08-30 16:32:43,714 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:32:43,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:32:43,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 16:32:43,714 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 16:32:43,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:32:43,714 INFO L85 PathProgramCache]: Analyzing trace with hash 57765716, now seen corresponding path program 1 times [2023-08-30 16:32:43,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:32:43,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130296565] [2023-08-30 16:32:43,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:32:43,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:32:43,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:32:43,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:32:43,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:32:43,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130296565] [2023-08-30 16:32:43,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130296565] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:32:43,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:32:43,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 16:32:43,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164034359] [2023-08-30 16:32:43,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:32:43,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 16:32:43,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:32:43,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 16:32:43,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 16:32:43,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 369 [2023-08-30 16:32:43,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 28 transitions, 101 flow. Second operand has 2 states, 2 states have (on average 149.0) internal successors, (298), 2 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:43,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:32:43,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 369 [2023-08-30 16:32:43,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:32:43,983 INFO L130 PetriNetUnfolder]: 1946/2997 cut-off events. [2023-08-30 16:32:43,983 INFO L131 PetriNetUnfolder]: For 2176/2176 co-relation queries the response was YES. [2023-08-30 16:32:43,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6751 conditions, 2997 events. 1946/2997 cut-off events. For 2176/2176 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 15443 event pairs, 1946 based on Foata normal form. 0/2876 useless extension candidates. Maximal degree in co-relation 1924. Up to 2675 conditions per place. [2023-08-30 16:32:43,988 INFO L137 encePairwiseOnDemand]: 362/369 looper letters, 0 selfloop transitions, 0 changer transitions 20/20 dead transitions. [2023-08-30 16:32:43,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 20 transitions, 119 flow [2023-08-30 16:32:43,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 16:32:43,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 16:32:43,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 318 transitions. [2023-08-30 16:32:43,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2023-08-30 16:32:43,990 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 318 transitions. [2023-08-30 16:32:43,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 318 transitions. [2023-08-30 16:32:43,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:32:43,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 318 transitions. [2023-08-30 16:32:43,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 159.0) internal successors, (318), 2 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:43,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 369.0) internal successors, (1107), 3 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:43,993 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 369.0) internal successors, (1107), 3 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:43,993 INFO L175 Difference]: Start difference. First operand has 38 places, 28 transitions, 101 flow. Second operand 2 states and 318 transitions. [2023-08-30 16:32:43,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 20 transitions, 119 flow [2023-08-30 16:32:43,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 20 transitions, 99 flow, removed 10 selfloop flow, removed 0 redundant places. [2023-08-30 16:32:44,000 INFO L231 Difference]: Finished difference. Result has 32 places, 0 transitions, 0 flow [2023-08-30 16:32:44,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=0, PETRI_PLACES=32, PETRI_TRANSITIONS=0} [2023-08-30 16:32:44,001 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -6 predicate places. [2023-08-30 16:32:44,001 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 0 transitions, 0 flow [2023-08-30 16:32:44,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 149.0) internal successors, (298), 2 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:44,001 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-08-30 16:32:44,002 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-30 16:32:44,002 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-30 16:32:44,002 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-30 16:32:44,002 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-30 16:32:44,002 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-30 16:32:44,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 16:32:44,003 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:32:44,004 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 16:32:44,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 174 transitions, 393 flow [2023-08-30 16:32:44,019 INFO L130 PetriNetUnfolder]: 26/232 cut-off events. [2023-08-30 16:32:44,019 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 16:32:44,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 232 events. 26/232 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 625 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 204. Up to 12 conditions per place. [2023-08-30 16:32:44,021 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 174 transitions, 393 flow [2023-08-30 16:32:44,022 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 174 transitions, 393 flow [2023-08-30 16:32:44,022 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:32:44,022 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 174 transitions, 393 flow [2023-08-30 16:32:44,023 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 174 transitions, 393 flow [2023-08-30 16:32:44,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 174 transitions, 393 flow [2023-08-30 16:32:44,038 INFO L130 PetriNetUnfolder]: 26/232 cut-off events. [2023-08-30 16:32:44,038 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 16:32:44,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 232 events. 26/232 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 625 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 204. Up to 12 conditions per place. [2023-08-30 16:32:44,043 INFO L119 LiptonReduction]: Number of co-enabled transitions 21170 [2023-08-30 16:32:47,559 INFO L134 LiptonReduction]: Checked pairs total: 21056 [2023-08-30 16:32:47,559 INFO L136 LiptonReduction]: Total number of compositions: 194 [2023-08-30 16:32:47,560 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 16:32:47,561 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;@3e9dfda3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:32:47,561 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 16:32:47,564 INFO L130 PetriNetUnfolder]: 1/45 cut-off events. [2023-08-30 16:32:47,564 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 16:32:47,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:32:47,564 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:32:47,564 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:32:47,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:32:47,565 INFO L85 PathProgramCache]: Analyzing trace with hash 70553239, now seen corresponding path program 1 times [2023-08-30 16:32:47,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:32:47,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106912582] [2023-08-30 16:32:47,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:32:47,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:32:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:32:47,585 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:32:47,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:32:47,598 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:32:47,598 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:32:47,598 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 16:32:47,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 16:32:47,599 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:32:47,599 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 16:32:47,599 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 16:32:47,599 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-30 16:32:47,619 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:32:47,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 204 transitions, 468 flow [2023-08-30 16:32:47,640 INFO L130 PetriNetUnfolder]: 31/274 cut-off events. [2023-08-30 16:32:47,640 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 16:32:47,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 274 events. 31/274 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 749 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 254. Up to 14 conditions per place. [2023-08-30 16:32:47,642 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 204 transitions, 468 flow [2023-08-30 16:32:47,644 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 204 transitions, 468 flow [2023-08-30 16:32:47,644 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:32:47,644 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 204 transitions, 468 flow [2023-08-30 16:32:47,644 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 204 transitions, 468 flow [2023-08-30 16:32:47,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 204 transitions, 468 flow [2023-08-30 16:32:47,663 INFO L130 PetriNetUnfolder]: 31/274 cut-off events. [2023-08-30 16:32:47,663 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 16:32:47,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 274 events. 31/274 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 749 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 254. Up to 14 conditions per place. [2023-08-30 16:32:47,670 INFO L119 LiptonReduction]: Number of co-enabled transitions 30624 [2023-08-30 16:32:51,328 INFO L134 LiptonReduction]: Checked pairs total: 28067 [2023-08-30 16:32:51,328 INFO L136 LiptonReduction]: Total number of compositions: 222 [2023-08-30 16:32:51,329 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:32:51,329 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;@3e9dfda3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:32:51,329 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 16:32:51,330 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-30 16:32:51,330 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:32:51,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:32:51,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 16:32:51,331 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 16:32:51,331 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:32:51,331 INFO L85 PathProgramCache]: Analyzing trace with hash 77936856, now seen corresponding path program 1 times [2023-08-30 16:32:51,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:32:51,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206358853] [2023-08-30 16:32:51,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:32:51,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:32:51,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:32:51,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:32:51,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:32:51,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206358853] [2023-08-30 16:32:51,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206358853] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:32:51,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:32:51,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 16:32:51,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383004503] [2023-08-30 16:32:51,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:32:51,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 16:32:51,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:32:51,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 16:32:51,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 16:32:51,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 426 [2023-08-30 16:32:51,348 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 34 transitions, 128 flow. Second operand has 2 states, 2 states have (on average 174.0) internal successors, (348), 2 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:51,348 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:32:51,348 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 426 [2023-08-30 16:32:51,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:32:52,171 INFO L130 PetriNetUnfolder]: 7292/10449 cut-off events. [2023-08-30 16:32:52,171 INFO L131 PetriNetUnfolder]: For 9628/9628 co-relation queries the response was YES. [2023-08-30 16:32:52,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23762 conditions, 10449 events. 7292/10449 cut-off events. For 9628/9628 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 57340 event pairs, 7292 based on Foata normal form. 0/10085 useless extension candidates. Maximal degree in co-relation 6946. Up to 9479 conditions per place. [2023-08-30 16:32:52,193 INFO L137 encePairwiseOnDemand]: 417/426 looper letters, 0 selfloop transitions, 0 changer transitions 23/23 dead transitions. [2023-08-30 16:32:52,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 23 transitions, 146 flow [2023-08-30 16:32:52,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 16:32:52,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 16:32:52,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 373 transitions. [2023-08-30 16:32:52,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43779342723004694 [2023-08-30 16:32:52,195 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 373 transitions. [2023-08-30 16:32:52,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 373 transitions. [2023-08-30 16:32:52,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:32:52,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 373 transitions. [2023-08-30 16:32:52,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 186.5) internal successors, (373), 2 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:52,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 426.0) internal successors, (1278), 3 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:52,197 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 426.0) internal successors, (1278), 3 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:52,197 INFO L175 Difference]: Start difference. First operand has 45 places, 34 transitions, 128 flow. Second operand 2 states and 373 transitions. [2023-08-30 16:32:52,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 23 transitions, 146 flow [2023-08-30 16:32:52,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 23 transitions, 116 flow, removed 15 selfloop flow, removed 0 redundant places. [2023-08-30 16:32:52,203 INFO L231 Difference]: Finished difference. Result has 37 places, 0 transitions, 0 flow [2023-08-30 16:32:52,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=0, PETRI_PLACES=37, PETRI_TRANSITIONS=0} [2023-08-30 16:32:52,204 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -8 predicate places. [2023-08-30 16:32:52,204 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 0 transitions, 0 flow [2023-08-30 16:32:52,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 174.0) internal successors, (348), 2 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:32:52,205 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 7 remaining) [2023-08-30 16:32:52,205 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-08-30 16:32:52,205 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-08-30 16:32:52,205 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-08-30 16:32:52,205 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-08-30 16:32:52,205 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-08-30 16:32:52,205 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-08-30 16:32:52,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 16:32:52,206 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:32:52,207 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 16:32:52,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 204 transitions, 468 flow [2023-08-30 16:32:52,228 INFO L130 PetriNetUnfolder]: 31/274 cut-off events. [2023-08-30 16:32:52,228 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 16:32:52,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 274 events. 31/274 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 749 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 254. Up to 14 conditions per place. [2023-08-30 16:32:52,230 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 204 transitions, 468 flow [2023-08-30 16:32:52,231 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 204 transitions, 468 flow [2023-08-30 16:32:52,231 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:32:52,231 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 204 transitions, 468 flow [2023-08-30 16:32:52,232 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 204 transitions, 468 flow [2023-08-30 16:32:52,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 204 transitions, 468 flow [2023-08-30 16:32:52,250 INFO L130 PetriNetUnfolder]: 31/274 cut-off events. [2023-08-30 16:32:52,250 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 16:32:52,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 274 events. 31/274 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 749 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 254. Up to 14 conditions per place. [2023-08-30 16:32:52,295 INFO L119 LiptonReduction]: Number of co-enabled transitions 30624 [2023-08-30 16:32:56,060 INFO L134 LiptonReduction]: Checked pairs total: 27214 [2023-08-30 16:32:56,060 INFO L136 LiptonReduction]: Total number of compositions: 221 [2023-08-30 16:32:56,061 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 16:32:56,061 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;@3e9dfda3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:32:56,061 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 16:32:56,065 INFO L130 PetriNetUnfolder]: 2/55 cut-off events. [2023-08-30 16:32:56,065 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 16:32:56,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:32:56,065 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:32:56,065 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:32:56,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:32:56,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1812128802, now seen corresponding path program 1 times [2023-08-30 16:32:56,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:32:56,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980779528] [2023-08-30 16:32:56,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:32:56,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:32:56,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:32:56,098 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:32:56,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:32:56,121 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:32:56,121 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:32:56,122 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 16:32:56,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 16:32:56,122 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:32:56,123 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 16:32:56,123 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 16:32:56,123 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-30 16:32:56,138 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:32:56,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 234 transitions, 545 flow [2023-08-30 16:32:56,164 INFO L130 PetriNetUnfolder]: 36/316 cut-off events. [2023-08-30 16:32:56,164 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-30 16:32:56,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 316 events. 36/316 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 916 event pairs, 0 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 305. Up to 16 conditions per place. [2023-08-30 16:32:56,167 INFO L82 GeneralOperation]: Start removeDead. Operand has 220 places, 234 transitions, 545 flow [2023-08-30 16:32:56,169 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 220 places, 234 transitions, 545 flow [2023-08-30 16:32:56,169 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:32:56,169 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 220 places, 234 transitions, 545 flow [2023-08-30 16:32:56,169 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 220 places, 234 transitions, 545 flow [2023-08-30 16:32:56,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 234 transitions, 545 flow [2023-08-30 16:32:56,200 INFO L130 PetriNetUnfolder]: 36/316 cut-off events. [2023-08-30 16:32:56,200 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-30 16:32:56,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 316 events. 36/316 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 916 event pairs, 0 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 305. Up to 16 conditions per place. [2023-08-30 16:32:56,209 INFO L119 LiptonReduction]: Number of co-enabled transitions 41818 [2023-08-30 16:33:00,707 INFO L134 LiptonReduction]: Checked pairs total: 40117 [2023-08-30 16:33:00,708 INFO L136 LiptonReduction]: Total number of compositions: 260 [2023-08-30 16:33:00,709 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:33:00,709 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;@3e9dfda3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:33:00,709 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-30 16:33:00,710 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-30 16:33:00,710 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:33:00,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:33:00,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 16:33:00,710 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-30 16:33:00,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:33:00,710 INFO L85 PathProgramCache]: Analyzing trace with hash 100762105, now seen corresponding path program 1 times [2023-08-30 16:33:00,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:33:00,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884134305] [2023-08-30 16:33:00,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:33:00,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:33:00,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:33:00,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:33:00,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:33:00,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884134305] [2023-08-30 16:33:00,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884134305] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:33:00,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:33:00,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 16:33:00,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780669579] [2023-08-30 16:33:00,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:33:00,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 16:33:00,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:33:00,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 16:33:00,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 16:33:00,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 494 [2023-08-30 16:33:00,720 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 36 transitions, 149 flow. Second operand has 2 states, 2 states have (on average 199.0) internal successors, (398), 2 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:00,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:33:00,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 494 [2023-08-30 16:33:00,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:33:03,542 INFO L130 PetriNetUnfolder]: 26246/35721 cut-off events. [2023-08-30 16:33:03,543 INFO L131 PetriNetUnfolder]: For 40003/40003 co-relation queries the response was YES. [2023-08-30 16:33:03,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81840 conditions, 35721 events. 26246/35721 cut-off events. For 40003/40003 co-relation queries the response was YES. Maximal size of possible extension queue 1425. Compared 205632 event pairs, 26246 based on Foata normal form. 0/34628 useless extension candidates. Maximal degree in co-relation 24361. Up to 32807 conditions per place. [2023-08-30 16:33:03,631 INFO L137 encePairwiseOnDemand]: 485/494 looper letters, 0 selfloop transitions, 0 changer transitions 26/26 dead transitions. [2023-08-30 16:33:03,631 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 26 transitions, 175 flow [2023-08-30 16:33:03,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 16:33:03,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 16:33:03,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 426 transitions. [2023-08-30 16:33:03,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4311740890688259 [2023-08-30 16:33:03,633 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 426 transitions. [2023-08-30 16:33:03,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 426 transitions. [2023-08-30 16:33:03,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:33:03,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 426 transitions. [2023-08-30 16:33:03,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 213.0) internal successors, (426), 2 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:03,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 494.0) internal successors, (1482), 3 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:03,636 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 494.0) internal successors, (1482), 3 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:03,636 INFO L175 Difference]: Start difference. First operand has 50 places, 36 transitions, 149 flow. Second operand 2 states and 426 transitions. [2023-08-30 16:33:03,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 26 transitions, 175 flow [2023-08-30 16:33:03,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 26 transitions, 133 flow, removed 21 selfloop flow, removed 0 redundant places. [2023-08-30 16:33:03,658 INFO L231 Difference]: Finished difference. Result has 42 places, 0 transitions, 0 flow [2023-08-30 16:33:03,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=494, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=0, PETRI_PLACES=42, PETRI_TRANSITIONS=0} [2023-08-30 16:33:03,659 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -8 predicate places. [2023-08-30 16:33:03,659 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 0 transitions, 0 flow [2023-08-30 16:33:03,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 199.0) internal successors, (398), 2 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:03,659 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 8 remaining) [2023-08-30 16:33:03,660 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2023-08-30 16:33:03,660 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2023-08-30 16:33:03,660 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2023-08-30 16:33:03,660 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2023-08-30 16:33:03,660 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2023-08-30 16:33:03,660 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2023-08-30 16:33:03,660 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2023-08-30 16:33:03,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 16:33:03,661 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:33:03,661 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 16:33:03,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 234 transitions, 545 flow [2023-08-30 16:33:03,686 INFO L130 PetriNetUnfolder]: 36/316 cut-off events. [2023-08-30 16:33:03,686 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-30 16:33:03,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 316 events. 36/316 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 916 event pairs, 0 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 305. Up to 16 conditions per place. [2023-08-30 16:33:03,688 INFO L82 GeneralOperation]: Start removeDead. Operand has 220 places, 234 transitions, 545 flow [2023-08-30 16:33:03,690 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 220 places, 234 transitions, 545 flow [2023-08-30 16:33:03,690 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:33:03,690 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 220 places, 234 transitions, 545 flow [2023-08-30 16:33:03,691 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 220 places, 234 transitions, 545 flow [2023-08-30 16:33:03,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 234 transitions, 545 flow [2023-08-30 16:33:03,714 INFO L130 PetriNetUnfolder]: 36/316 cut-off events. [2023-08-30 16:33:03,714 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-30 16:33:03,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 316 events. 36/316 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 916 event pairs, 0 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 305. Up to 16 conditions per place. [2023-08-30 16:33:03,723 INFO L119 LiptonReduction]: Number of co-enabled transitions 41818 [2023-08-30 16:33:08,445 INFO L134 LiptonReduction]: Checked pairs total: 40847 [2023-08-30 16:33:08,445 INFO L136 LiptonReduction]: Total number of compositions: 266 [2023-08-30 16:33:08,446 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 16:33:08,446 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;@3e9dfda3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:33:08,446 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 16:33:08,450 INFO L130 PetriNetUnfolder]: 1/61 cut-off events. [2023-08-30 16:33:08,450 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-30 16:33:08,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:33:08,450 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:33:08,450 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:33:08,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:33:08,450 INFO L85 PathProgramCache]: Analyzing trace with hash -402409257, now seen corresponding path program 1 times [2023-08-30 16:33:08,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:33:08,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021414473] [2023-08-30 16:33:08,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:33:08,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:33:08,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:33:08,477 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:33:08,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:33:08,492 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:33:08,493 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:33:08,493 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 16:33:08,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 16:33:08,493 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:33:08,495 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 16:33:08,495 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 16:33:08,495 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-30 16:33:08,521 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:33:08,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 248 places, 264 transitions, 624 flow [2023-08-30 16:33:08,552 INFO L130 PetriNetUnfolder]: 41/358 cut-off events. [2023-08-30 16:33:08,553 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-30 16:33:08,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 358 events. 41/358 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1066 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 357. Up to 18 conditions per place. [2023-08-30 16:33:08,556 INFO L82 GeneralOperation]: Start removeDead. Operand has 248 places, 264 transitions, 624 flow [2023-08-30 16:33:08,558 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 248 places, 264 transitions, 624 flow [2023-08-30 16:33:08,558 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:33:08,558 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 248 places, 264 transitions, 624 flow [2023-08-30 16:33:08,558 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 248 places, 264 transitions, 624 flow [2023-08-30 16:33:08,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 248 places, 264 transitions, 624 flow [2023-08-30 16:33:08,587 INFO L130 PetriNetUnfolder]: 41/358 cut-off events. [2023-08-30 16:33:08,587 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-30 16:33:08,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 358 events. 41/358 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1066 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 357. Up to 18 conditions per place. [2023-08-30 16:33:08,599 INFO L119 LiptonReduction]: Number of co-enabled transitions 54752 [2023-08-30 16:33:14,037 INFO L134 LiptonReduction]: Checked pairs total: 55113 [2023-08-30 16:33:14,037 INFO L136 LiptonReduction]: Total number of compositions: 297 [2023-08-30 16:33:14,038 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:33:14,039 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;@3e9dfda3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:33:14,039 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-08-30 16:33:14,039 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-30 16:33:14,039 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:33:14,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:33:14,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 16:33:14,040 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-30 16:33:14,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:33:14,040 INFO L85 PathProgramCache]: Analyzing trace with hash 126948684, now seen corresponding path program 1 times [2023-08-30 16:33:14,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:33:14,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897080026] [2023-08-30 16:33:14,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:33:14,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:33:14,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:33:14,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:33:14,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:33:14,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897080026] [2023-08-30 16:33:14,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897080026] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:33:14,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:33:14,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 16:33:14,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463685441] [2023-08-30 16:33:14,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:33:14,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 16:33:14,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:33:14,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 16:33:14,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 16:33:14,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 561 [2023-08-30 16:33:14,054 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 42 transitions, 180 flow. Second operand has 2 states, 2 states have (on average 224.0) internal successors, (448), 2 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:14,054 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:33:14,054 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 561 [2023-08-30 16:33:14,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:33:23,652 INFO L130 PetriNetUnfolder]: 91856/120285 cut-off events. [2023-08-30 16:33:23,652 INFO L131 PetriNetUnfolder]: For 158830/158830 co-relation queries the response was YES. [2023-08-30 16:33:23,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277213 conditions, 120285 events. 91856/120285 cut-off events. For 158830/158830 co-relation queries the response was YES. Maximal size of possible extension queue 4108. Compared 716324 event pairs, 91856 based on Foata normal form. 0/117005 useless extension candidates. Maximal degree in co-relation 83653. Up to 111539 conditions per place. [2023-08-30 16:33:24,008 INFO L137 encePairwiseOnDemand]: 550/561 looper letters, 0 selfloop transitions, 0 changer transitions 29/29 dead transitions. [2023-08-30 16:33:24,008 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 29 transitions, 206 flow [2023-08-30 16:33:24,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 16:33:24,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 16:33:24,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 481 transitions. [2023-08-30 16:33:24,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428698752228164 [2023-08-30 16:33:24,010 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 481 transitions. [2023-08-30 16:33:24,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 481 transitions. [2023-08-30 16:33:24,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:33:24,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 481 transitions. [2023-08-30 16:33:24,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 240.5) internal successors, (481), 2 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:24,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 561.0) internal successors, (1683), 3 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:24,017 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 561.0) internal successors, (1683), 3 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:24,017 INFO L175 Difference]: Start difference. First operand has 57 places, 42 transitions, 180 flow. Second operand 2 states and 481 transitions. [2023-08-30 16:33:24,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 29 transitions, 206 flow [2023-08-30 16:33:24,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 29 transitions, 150 flow, removed 28 selfloop flow, removed 0 redundant places. [2023-08-30 16:33:24,239 INFO L231 Difference]: Finished difference. Result has 47 places, 0 transitions, 0 flow [2023-08-30 16:33:24,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=561, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=0, PETRI_PLACES=47, PETRI_TRANSITIONS=0} [2023-08-30 16:33:24,240 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -10 predicate places. [2023-08-30 16:33:24,240 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 0 transitions, 0 flow [2023-08-30 16:33:24,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 224.0) internal successors, (448), 2 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:24,240 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (8 of 9 remaining) [2023-08-30 16:33:24,240 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2023-08-30 16:33:24,240 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2023-08-30 16:33:24,240 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2023-08-30 16:33:24,241 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2023-08-30 16:33:24,241 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2023-08-30 16:33:24,241 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2023-08-30 16:33:24,241 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2023-08-30 16:33:24,241 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2023-08-30 16:33:24,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 16:33:24,241 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:33:24,241 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 16:33:24,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 248 places, 264 transitions, 624 flow [2023-08-30 16:33:24,280 INFO L130 PetriNetUnfolder]: 41/358 cut-off events. [2023-08-30 16:33:24,280 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-30 16:33:24,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 358 events. 41/358 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1066 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 357. Up to 18 conditions per place. [2023-08-30 16:33:24,284 INFO L82 GeneralOperation]: Start removeDead. Operand has 248 places, 264 transitions, 624 flow [2023-08-30 16:33:24,286 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 248 places, 264 transitions, 624 flow [2023-08-30 16:33:24,286 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:33:24,287 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 248 places, 264 transitions, 624 flow [2023-08-30 16:33:24,287 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 248 places, 264 transitions, 624 flow [2023-08-30 16:33:24,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 248 places, 264 transitions, 624 flow [2023-08-30 16:33:24,324 INFO L130 PetriNetUnfolder]: 41/358 cut-off events. [2023-08-30 16:33:24,324 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-30 16:33:24,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 358 events. 41/358 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1066 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 357. Up to 18 conditions per place. [2023-08-30 16:33:24,338 INFO L119 LiptonReduction]: Number of co-enabled transitions 54752 [2023-08-30 16:33:29,826 INFO L134 LiptonReduction]: Checked pairs total: 55690 [2023-08-30 16:33:29,826 INFO L136 LiptonReduction]: Total number of compositions: 299 [2023-08-30 16:33:29,827 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 16:33:29,827 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;@3e9dfda3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:33:29,828 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 16:33:29,832 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2023-08-30 16:33:29,832 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-30 16:33:29,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:33:29,832 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:33:29,832 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:33:29,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:33:29,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1266315901, now seen corresponding path program 1 times [2023-08-30 16:33:29,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:33:29,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871300077] [2023-08-30 16:33:29,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:33:29,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:33:29,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:33:29,853 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:33:29,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:33:29,865 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:33:29,867 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:33:29,867 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 16:33:29,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 16:33:29,867 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:33:29,867 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 16:33:29,867 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 16:33:29,868 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-30 16:33:29,884 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:33:29,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 276 places, 294 transitions, 705 flow [2023-08-30 16:33:29,926 INFO L130 PetriNetUnfolder]: 46/400 cut-off events. [2023-08-30 16:33:29,926 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-30 16:33:29,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473 conditions, 400 events. 46/400 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1216 event pairs, 0 based on Foata normal form. 0/335 useless extension candidates. Maximal degree in co-relation 410. Up to 20 conditions per place. [2023-08-30 16:33:29,931 INFO L82 GeneralOperation]: Start removeDead. Operand has 276 places, 294 transitions, 705 flow [2023-08-30 16:33:29,933 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 276 places, 294 transitions, 705 flow [2023-08-30 16:33:29,933 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:33:29,933 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 276 places, 294 transitions, 705 flow [2023-08-30 16:33:29,933 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 276 places, 294 transitions, 705 flow [2023-08-30 16:33:29,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 276 places, 294 transitions, 705 flow [2023-08-30 16:33:29,970 INFO L130 PetriNetUnfolder]: 46/400 cut-off events. [2023-08-30 16:33:29,970 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-30 16:33:29,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473 conditions, 400 events. 46/400 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1216 event pairs, 0 based on Foata normal form. 0/335 useless extension candidates. Maximal degree in co-relation 410. Up to 20 conditions per place. [2023-08-30 16:33:29,988 INFO L119 LiptonReduction]: Number of co-enabled transitions 69426 [2023-08-30 16:33:35,581 INFO L134 LiptonReduction]: Checked pairs total: 66793 [2023-08-30 16:33:35,581 INFO L136 LiptonReduction]: Total number of compositions: 325 [2023-08-30 16:33:35,582 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:33:35,582 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;@3e9dfda3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:33:35,582 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-30 16:33:35,583 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-30 16:33:35,583 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:33:35,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:33:35,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 16:33:35,583 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-08-30 16:33:35,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:33:35,583 INFO L85 PathProgramCache]: Analyzing trace with hash 156223280, now seen corresponding path program 1 times [2023-08-30 16:33:35,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:33:35,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592110068] [2023-08-30 16:33:35,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:33:35,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:33:35,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:33:35,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:33:35,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:33:35,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592110068] [2023-08-30 16:33:35,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592110068] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:33:35,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:33:35,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 16:33:35,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525681876] [2023-08-30 16:33:35,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:33:35,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 16:33:35,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:33:35,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 16:33:35,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 16:33:35,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 619 [2023-08-30 16:33:35,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 44 transitions, 205 flow. Second operand has 2 states, 2 states have (on average 249.0) internal successors, (498), 2 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:33:35,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:33:35,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 619 [2023-08-30 16:33:35,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:34:09,530 INFO L130 PetriNetUnfolder]: 314930/400221 cut-off events. [2023-08-30 16:34:09,531 INFO L131 PetriNetUnfolder]: For 609352/609352 co-relation queries the response was YES. [2023-08-30 16:34:10,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 926753 conditions, 400221 events. 314930/400221 cut-off events. For 609352/609352 co-relation queries the response was YES. Maximal size of possible extension queue 11911. Compared 2455636 event pairs, 314930 based on Foata normal form. 0/390380 useless extension candidates. Maximal degree in co-relation 282670. Up to 373979 conditions per place. [2023-08-30 16:34:10,880 INFO L137 encePairwiseOnDemand]: 608/619 looper letters, 0 selfloop transitions, 0 changer transitions 32/32 dead transitions. [2023-08-30 16:34:10,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 32 transitions, 239 flow [2023-08-30 16:34:10,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 16:34:10,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 16:34:10,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 534 transitions. [2023-08-30 16:34:10,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43134087237479807 [2023-08-30 16:34:10,882 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 534 transitions. [2023-08-30 16:34:10,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 534 transitions. [2023-08-30 16:34:10,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:34:10,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 534 transitions. [2023-08-30 16:34:10,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 267.0) internal successors, (534), 2 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:34:10,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 619.0) internal successors, (1857), 3 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:34:10,885 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 619.0) internal successors, (1857), 3 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:34:10,885 INFO L175 Difference]: Start difference. First operand has 62 places, 44 transitions, 205 flow. Second operand 2 states and 534 transitions. [2023-08-30 16:34:10,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 32 transitions, 239 flow [2023-08-30 16:34:11,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 32 transitions, 167 flow, removed 36 selfloop flow, removed 0 redundant places. [2023-08-30 16:34:11,694 INFO L231 Difference]: Finished difference. Result has 52 places, 0 transitions, 0 flow [2023-08-30 16:34:11,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=619, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=0, PETRI_PLACES=52, PETRI_TRANSITIONS=0} [2023-08-30 16:34:11,694 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -10 predicate places. [2023-08-30 16:34:11,695 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 0 transitions, 0 flow [2023-08-30 16:34:11,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 249.0) internal successors, (498), 2 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:34:11,695 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (9 of 10 remaining) [2023-08-30 16:34:11,695 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (8 of 10 remaining) [2023-08-30 16:34:11,695 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 10 remaining) [2023-08-30 16:34:11,695 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 10 remaining) [2023-08-30 16:34:11,695 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 10 remaining) [2023-08-30 16:34:11,695 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 10 remaining) [2023-08-30 16:34:11,695 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 10 remaining) [2023-08-30 16:34:11,695 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 10 remaining) [2023-08-30 16:34:11,696 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 10 remaining) [2023-08-30 16:34:11,696 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 10 remaining) [2023-08-30 16:34:11,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 16:34:11,696 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:34:11,696 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 16:34:11,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 276 places, 294 transitions, 705 flow [2023-08-30 16:34:11,734 INFO L130 PetriNetUnfolder]: 46/400 cut-off events. [2023-08-30 16:34:11,734 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-30 16:34:11,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473 conditions, 400 events. 46/400 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1216 event pairs, 0 based on Foata normal form. 0/335 useless extension candidates. Maximal degree in co-relation 410. Up to 20 conditions per place. [2023-08-30 16:34:11,738 INFO L82 GeneralOperation]: Start removeDead. Operand has 276 places, 294 transitions, 705 flow [2023-08-30 16:34:11,740 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 276 places, 294 transitions, 705 flow [2023-08-30 16:34:11,740 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:34:11,741 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 276 places, 294 transitions, 705 flow [2023-08-30 16:34:11,741 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 276 places, 294 transitions, 705 flow [2023-08-30 16:34:11,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 276 places, 294 transitions, 705 flow [2023-08-30 16:34:11,777 INFO L130 PetriNetUnfolder]: 46/400 cut-off events. [2023-08-30 16:34:11,778 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-30 16:34:11,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473 conditions, 400 events. 46/400 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1216 event pairs, 0 based on Foata normal form. 0/335 useless extension candidates. Maximal degree in co-relation 410. Up to 20 conditions per place. [2023-08-30 16:34:11,795 INFO L119 LiptonReduction]: Number of co-enabled transitions 69426 [2023-08-30 16:34:17,362 INFO L134 LiptonReduction]: Checked pairs total: 68764 [2023-08-30 16:34:17,362 INFO L136 LiptonReduction]: Total number of compositions: 328 [2023-08-30 16:34:17,363 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 16:34:17,363 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;@3e9dfda3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:34:17,363 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 16:34:17,368 INFO L130 PetriNetUnfolder]: 3/81 cut-off events. [2023-08-30 16:34:17,368 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-30 16:34:17,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:34:17,368 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:34:17,368 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:34:17,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:34:17,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1079706746, now seen corresponding path program 1 times [2023-08-30 16:34:17,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:34:17,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607355462] [2023-08-30 16:34:17,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:34:17,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:34:17,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:34:17,379 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:34:17,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:34:17,389 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:34:17,389 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:34:17,389 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 16:34:17,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 16:34:17,389 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 16:34:17,389 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 16:34:17,390 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 16:34:17,390 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-30 16:34:17,409 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:34:17,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 304 places, 324 transitions, 788 flow [2023-08-30 16:34:17,456 INFO L130 PetriNetUnfolder]: 51/442 cut-off events. [2023-08-30 16:34:17,456 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-30 16:34:17,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528 conditions, 442 events. 51/442 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1362 event pairs, 0 based on Foata normal form. 0/370 useless extension candidates. Maximal degree in co-relation 464. Up to 22 conditions per place. [2023-08-30 16:34:17,464 INFO L82 GeneralOperation]: Start removeDead. Operand has 304 places, 324 transitions, 788 flow [2023-08-30 16:34:17,467 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 304 places, 324 transitions, 788 flow [2023-08-30 16:34:17,467 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:34:17,467 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 304 places, 324 transitions, 788 flow [2023-08-30 16:34:17,467 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 304 places, 324 transitions, 788 flow [2023-08-30 16:34:17,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 304 places, 324 transitions, 788 flow [2023-08-30 16:34:17,513 INFO L130 PetriNetUnfolder]: 51/442 cut-off events. [2023-08-30 16:34:17,513 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-30 16:34:17,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528 conditions, 442 events. 51/442 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1362 event pairs, 0 based on Foata normal form. 0/370 useless extension candidates. Maximal degree in co-relation 464. Up to 22 conditions per place. [2023-08-30 16:34:17,536 INFO L119 LiptonReduction]: Number of co-enabled transitions 85840 [2023-08-30 16:34:23,555 INFO L134 LiptonReduction]: Checked pairs total: 82447 [2023-08-30 16:34:23,555 INFO L136 LiptonReduction]: Total number of compositions: 367 [2023-08-30 16:34:23,556 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:34:23,556 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;@3e9dfda3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:34:23,556 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-30 16:34:23,557 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2023-08-30 16:34:23,557 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:34:23,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:34:23,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 16:34:23,558 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-08-30 16:34:23,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:34:23,558 INFO L85 PathProgramCache]: Analyzing trace with hash 188120353, now seen corresponding path program 1 times [2023-08-30 16:34:23,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:34:23,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296287928] [2023-08-30 16:34:23,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:34:23,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:34:23,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:34:23,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:34:23,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:34:23,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296287928] [2023-08-30 16:34:23,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296287928] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:34:23,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:34:23,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 16:34:23,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192113182] [2023-08-30 16:34:23,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:34:23,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 16:34:23,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:34:23,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 16:34:23,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 16:34:23,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 691 [2023-08-30 16:34:23,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 54 transitions, 248 flow. Second operand has 2 states, 2 states have (on average 274.0) internal successors, (548), 2 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:34:23,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:34:23,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 691 [2023-08-30 16:34:23,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand