./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/pthread-ext/37_stack_lock_p0_vs_concur.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-ext/37_stack_lock_p0_vs_concur.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a8bcba962b15df67a0e136eef2e702f216cc120b7626a7b8dc8877f6ecaf3765 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 05:10:10,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 05:10:10,380 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 05:10:10,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 05:10:10,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 05:10:10,429 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 05:10:10,431 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 05:10:10,433 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 05:10:10,435 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 05:10:10,439 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 05:10:10,440 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 05:10:10,447 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 05:10:10,447 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 05:10:10,449 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 05:10:10,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 05:10:10,454 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 05:10:10,455 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 05:10:10,456 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 05:10:10,457 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 05:10:10,462 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 05:10:10,463 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 05:10:10,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 05:10:10,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 05:10:10,466 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 05:10:10,472 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 05:10:10,473 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 05:10:10,473 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 05:10:10,475 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 05:10:10,476 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 05:10:10,476 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 05:10:10,477 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 05:10:10,482 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 05:10:10,484 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 05:10:10,485 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 05:10:10,486 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 05:10:10,486 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 05:10:10,487 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 05:10:10,487 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 05:10:10,487 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 05:10:10,503 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 05:10:10,503 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 05:10:10,505 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-09-01 05:10:10,534 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 05:10:10,535 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 05:10:10,535 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 05:10:10,536 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 05:10:10,537 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 05:10:10,537 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 05:10:10,537 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 05:10:10,538 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 05:10:10,538 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 05:10:10,538 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 05:10:10,539 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 05:10:10,539 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 05:10:10,539 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 05:10:10,539 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 05:10:10,540 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 05:10:10,540 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 05:10:10,540 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 05:10:10,540 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 05:10:10,540 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-09-01 05:10:10,540 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 05:10:10,541 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 05:10:10,541 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 05:10:10,541 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 05:10:10,541 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 05:10:10,542 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 05:10:10,542 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 05:10:10,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 05:10:10,542 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 05:10:10,542 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 05:10:10,543 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 05:10:10,543 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 05:10:10,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 05:10:10,543 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 05:10:10,543 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 05:10:10,544 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 05:10:10,544 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 05:10:10,544 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 05:10:10,544 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8bcba962b15df67a0e136eef2e702f216cc120b7626a7b8dc8877f6ecaf3765 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 05:10:10,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 05:10:10,890 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 05:10:10,893 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 05:10:10,894 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 05:10:10,894 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 05:10:10,896 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/37_stack_lock_p0_vs_concur.i [2023-09-01 05:10:12,181 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 05:10:12,432 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 05:10:12,432 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/37_stack_lock_p0_vs_concur.i [2023-09-01 05:10:12,449 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4eb917568/3372575a826c45969bbefb3fa52b2bd0/FLAGbd4d00cb3 [2023-09-01 05:10:12,460 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4eb917568/3372575a826c45969bbefb3fa52b2bd0 [2023-09-01 05:10:12,462 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 05:10:12,463 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 05:10:12,464 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 05:10:12,464 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 05:10:12,467 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 05:10:12,467 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 05:10:12" (1/1) ... [2023-09-01 05:10:12,468 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@131bfdda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:10:12, skipping insertion in model container [2023-09-01 05:10:12,468 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 05:10:12" (1/1) ... [2023-09-01 05:10:12,473 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 05:10:12,509 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 05:10:12,856 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/37_stack_lock_p0_vs_concur.i[30726,30739] [2023-09-01 05:10:12,861 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 05:10:12,873 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 05:10:12,926 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/37_stack_lock_p0_vs_concur.i[30726,30739] [2023-09-01 05:10:12,929 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 05:10:12,968 INFO L208 MainTranslator]: Completed translation [2023-09-01 05:10:12,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:10:12 WrapperNode [2023-09-01 05:10:12,969 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 05:10:12,970 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 05:10:12,970 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 05:10:12,971 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 05:10:12,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:10:12" (1/1) ... [2023-09-01 05:10:12,997 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:10:12" (1/1) ... [2023-09-01 05:10:13,025 INFO L138 Inliner]: procedures = 171, calls = 26, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 93 [2023-09-01 05:10:13,026 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 05:10:13,027 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 05:10:13,027 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 05:10:13,028 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 05:10:13,036 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:10:12" (1/1) ... [2023-09-01 05:10:13,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:10:12" (1/1) ... [2023-09-01 05:10:13,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:10:12" (1/1) ... [2023-09-01 05:10:13,052 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:10:12" (1/1) ... [2023-09-01 05:10:13,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:10:12" (1/1) ... [2023-09-01 05:10:13,068 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:10:12" (1/1) ... [2023-09-01 05:10:13,069 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:10:12" (1/1) ... [2023-09-01 05:10:13,074 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:10:12" (1/1) ... [2023-09-01 05:10:13,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 05:10:13,083 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 05:10:13,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 05:10:13,083 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 05:10:13,084 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:10:12" (1/1) ... [2023-09-01 05:10:13,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 05:10:13,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 05:10:13,113 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 05:10:13,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 05:10:13,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 05:10:13,156 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-09-01 05:10:13,157 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-09-01 05:10:13,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 05:10:13,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 05:10:13,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 05:10:13,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 05:10:13,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 05:10:13,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 05:10:13,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 05:10:13,160 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 05:10:13,275 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 05:10:13,277 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 05:10:13,537 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 05:10:13,621 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 05:10:13,622 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 05:10:13,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 05:10:13 BoogieIcfgContainer [2023-09-01 05:10:13,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 05:10:13,631 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 05:10:13,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 05:10:13,633 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 05:10:13,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 05:10:12" (1/3) ... [2023-09-01 05:10:13,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1661a668 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 05:10:13, skipping insertion in model container [2023-09-01 05:10:13,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 05:10:12" (2/3) ... [2023-09-01 05:10:13,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1661a668 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 05:10:13, skipping insertion in model container [2023-09-01 05:10:13,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 05:10:13" (3/3) ... [2023-09-01 05:10:13,636 INFO L112 eAbstractionObserver]: Analyzing ICFG 37_stack_lock_p0_vs_concur.i [2023-09-01 05:10:13,642 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 05:10:13,651 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 05:10:13,651 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-09-01 05:10:13,651 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 05:10:13,718 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:10:13,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 86 transitions, 177 flow [2023-09-01 05:10:13,800 INFO L130 PetriNetUnfolder]: 7/96 cut-off events. [2023-09-01 05:10:13,801 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 05:10:13,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 96 events. 7/96 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 124 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 70. Up to 4 conditions per place. [2023-09-01 05:10:13,806 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 86 transitions, 177 flow [2023-09-01 05:10:13,809 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 86 transitions, 177 flow [2023-09-01 05:10:13,811 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:10:13,820 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 86 transitions, 177 flow [2023-09-01 05:10:13,822 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 86 transitions, 177 flow [2023-09-01 05:10:13,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 86 transitions, 177 flow [2023-09-01 05:10:13,841 INFO L130 PetriNetUnfolder]: 7/96 cut-off events. [2023-09-01 05:10:13,842 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 05:10:13,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 96 events. 7/96 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 124 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 70. Up to 4 conditions per place. [2023-09-01 05:10:13,844 INFO L119 LiptonReduction]: Number of co-enabled transitions 1508 [2023-09-01 05:10:15,613 INFO L134 LiptonReduction]: Checked pairs total: 2224 [2023-09-01 05:10:15,613 INFO L136 LiptonReduction]: Total number of compositions: 80 [2023-09-01 05:10:15,625 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:10:15,631 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:10:15,631 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:10:15,635 INFO L130 PetriNetUnfolder]: 0/15 cut-off events. [2023-09-01 05:10:15,635 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 05:10:15,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:10:15,636 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-09-01 05:10:15,636 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:10:15,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:10:15,641 INFO L85 PathProgramCache]: Analyzing trace with hash 526005355, now seen corresponding path program 1 times [2023-09-01 05:10:15,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:10:15,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104812040] [2023-09-01 05:10:15,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:10:15,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:10:15,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:10:15,728 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:10:15,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:10:15,757 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:10:15,759 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:10:15,760 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:10:15,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 05:10:15,762 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:10:15,764 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:10:15,765 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:10:15,765 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 05:10:15,796 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:10:15,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 145 transitions, 302 flow [2023-09-01 05:10:15,826 INFO L130 PetriNetUnfolder]: 13/167 cut-off events. [2023-09-01 05:10:15,827 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 05:10:15,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 167 events. 13/167 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 435 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 128. Up to 6 conditions per place. [2023-09-01 05:10:15,829 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 145 transitions, 302 flow [2023-09-01 05:10:15,830 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 139 places, 145 transitions, 302 flow [2023-09-01 05:10:15,831 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:10:15,831 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 139 places, 145 transitions, 302 flow [2023-09-01 05:10:15,831 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 139 places, 145 transitions, 302 flow [2023-09-01 05:10:15,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 145 transitions, 302 flow [2023-09-01 05:10:15,859 INFO L130 PetriNetUnfolder]: 13/167 cut-off events. [2023-09-01 05:10:15,859 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 05:10:15,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 167 events. 13/167 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 435 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 128. Up to 6 conditions per place. [2023-09-01 05:10:15,865 INFO L119 LiptonReduction]: Number of co-enabled transitions 9860 [2023-09-01 05:10:17,304 INFO L134 LiptonReduction]: Checked pairs total: 30885 [2023-09-01 05:10:17,305 INFO L136 LiptonReduction]: Total number of compositions: 105 [2023-09-01 05:10:17,308 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:10:17,312 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:10:17,313 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:10:17,326 INFO L130 PetriNetUnfolder]: 1/45 cut-off events. [2023-09-01 05:10:17,326 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 05:10:17,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:10:17,326 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-09-01 05:10:17,327 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:10:17,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:10:17,327 INFO L85 PathProgramCache]: Analyzing trace with hash -977476665, now seen corresponding path program 1 times [2023-09-01 05:10:17,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:10:17,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326676233] [2023-09-01 05:10:17,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:10:17,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:10:17,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:10:17,360 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:10:17,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:10:17,378 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:10:17,378 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:10:17,378 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:10:17,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 05:10:17,379 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:10:17,379 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:10:17,380 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:10:17,380 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-09-01 05:10:17,422 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:10:17,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 204 transitions, 429 flow [2023-09-01 05:10:17,459 INFO L130 PetriNetUnfolder]: 19/238 cut-off events. [2023-09-01 05:10:17,459 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 05:10:17,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 238 events. 19/238 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 788 event pairs, 0 based on Foata normal form. 0/185 useless extension candidates. Maximal degree in co-relation 186. Up to 8 conditions per place. [2023-09-01 05:10:17,462 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 204 transitions, 429 flow [2023-09-01 05:10:17,464 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 204 transitions, 429 flow [2023-09-01 05:10:17,465 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:10:17,465 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 195 places, 204 transitions, 429 flow [2023-09-01 05:10:17,465 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 195 places, 204 transitions, 429 flow [2023-09-01 05:10:17,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 204 transitions, 429 flow [2023-09-01 05:10:17,502 INFO L130 PetriNetUnfolder]: 19/238 cut-off events. [2023-09-01 05:10:17,502 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 05:10:17,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 238 events. 19/238 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 788 event pairs, 0 based on Foata normal form. 0/185 useless extension candidates. Maximal degree in co-relation 186. Up to 8 conditions per place. [2023-09-01 05:10:17,513 INFO L119 LiptonReduction]: Number of co-enabled transitions 25056 [2023-09-01 05:10:19,420 INFO L134 LiptonReduction]: Checked pairs total: 81602 [2023-09-01 05:10:19,421 INFO L136 LiptonReduction]: Total number of compositions: 151 [2023-09-01 05:10:19,423 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:10:19,423 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:10:19,423 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:10:19,430 INFO L130 PetriNetUnfolder]: 2/66 cut-off events. [2023-09-01 05:10:19,430 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 05:10:19,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:10:19,430 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-09-01 05:10:19,431 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:10:19,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:10:19,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1732661604, now seen corresponding path program 1 times [2023-09-01 05:10:19,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:10:19,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475293207] [2023-09-01 05:10:19,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:10:19,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:10:19,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:10:19,451 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:10:19,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:10:19,469 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:10:19,469 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:10:19,469 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:10:19,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 05:10:19,470 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:10:19,470 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:10:19,471 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:10:19,471 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-09-01 05:10:19,509 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:10:19,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 263 transitions, 558 flow [2023-09-01 05:10:19,576 INFO L130 PetriNetUnfolder]: 25/309 cut-off events. [2023-09-01 05:10:19,576 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 05:10:19,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 309 events. 25/309 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1138 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 246. Up to 10 conditions per place. [2023-09-01 05:10:19,581 INFO L82 GeneralOperation]: Start removeDead. Operand has 251 places, 263 transitions, 558 flow [2023-09-01 05:10:19,584 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 251 places, 263 transitions, 558 flow [2023-09-01 05:10:19,585 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:10:19,585 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 251 places, 263 transitions, 558 flow [2023-09-01 05:10:19,586 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 251 places, 263 transitions, 558 flow [2023-09-01 05:10:19,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 263 transitions, 558 flow [2023-09-01 05:10:19,628 INFO L130 PetriNetUnfolder]: 25/309 cut-off events. [2023-09-01 05:10:19,628 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 05:10:19,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 309 events. 25/309 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1138 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 246. Up to 10 conditions per place. [2023-09-01 05:10:19,648 INFO L119 LiptonReduction]: Number of co-enabled transitions 47096 [2023-09-01 05:10:22,030 INFO L134 LiptonReduction]: Checked pairs total: 160776 [2023-09-01 05:10:22,031 INFO L136 LiptonReduction]: Total number of compositions: 192 [2023-09-01 05:10:22,033 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:10:22,033 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:10:22,034 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:10:22,043 INFO L130 PetriNetUnfolder]: 5/102 cut-off events. [2023-09-01 05:10:22,043 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 05:10:22,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:10:22,044 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-09-01 05:10:22,044 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:10:22,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:10:22,044 INFO L85 PathProgramCache]: Analyzing trace with hash -284072271, now seen corresponding path program 1 times [2023-09-01 05:10:22,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:10:22,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221315816] [2023-09-01 05:10:22,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:10:22,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:10:22,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:10:22,065 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:10:22,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:10:22,083 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:10:22,084 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:10:22,084 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:10:22,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 05:10:22,084 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:10:22,085 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:10:22,085 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:10:22,085 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-09-01 05:10:22,136 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:10:22,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 307 places, 322 transitions, 689 flow [2023-09-01 05:10:22,195 INFO L130 PetriNetUnfolder]: 31/380 cut-off events. [2023-09-01 05:10:22,196 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 05:10:22,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 380 events. 31/380 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1485 event pairs, 0 based on Foata normal form. 0/293 useless extension candidates. Maximal degree in co-relation 322. Up to 12 conditions per place. [2023-09-01 05:10:22,201 INFO L82 GeneralOperation]: Start removeDead. Operand has 307 places, 322 transitions, 689 flow [2023-09-01 05:10:22,205 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 307 places, 322 transitions, 689 flow [2023-09-01 05:10:22,205 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:10:22,205 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 307 places, 322 transitions, 689 flow [2023-09-01 05:10:22,205 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 307 places, 322 transitions, 689 flow [2023-09-01 05:10:22,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 307 places, 322 transitions, 689 flow [2023-09-01 05:10:22,277 INFO L130 PetriNetUnfolder]: 31/380 cut-off events. [2023-09-01 05:10:22,277 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 05:10:22,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 380 events. 31/380 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1485 event pairs, 0 based on Foata normal form. 0/293 useless extension candidates. Maximal degree in co-relation 322. Up to 12 conditions per place. [2023-09-01 05:10:22,299 INFO L119 LiptonReduction]: Number of co-enabled transitions 75980 [2023-09-01 05:10:24,887 INFO L134 LiptonReduction]: Checked pairs total: 264824 [2023-09-01 05:10:24,888 INFO L136 LiptonReduction]: Total number of compositions: 234 [2023-09-01 05:10:24,893 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:10:24,895 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:10:24,895 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:10:24,908 INFO L130 PetriNetUnfolder]: 7/138 cut-off events. [2023-09-01 05:10:24,908 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 05:10:24,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:10:24,909 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:10:24,909 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:10:24,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:10:24,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1376024068, now seen corresponding path program 1 times [2023-09-01 05:10:24,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:10:24,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732687533] [2023-09-01 05:10:24,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:10:24,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:10:24,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:10:24,959 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:10:24,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:10:24,985 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:10:24,987 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:10:24,988 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:10:24,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 05:10:24,989 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:10:24,989 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:10:24,992 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:10:24,993 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-09-01 05:10:25,048 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:10:25,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 363 places, 381 transitions, 822 flow [2023-09-01 05:10:25,124 INFO L130 PetriNetUnfolder]: 37/451 cut-off events. [2023-09-01 05:10:25,125 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 05:10:25,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 451 events. 37/451 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1852 event pairs, 0 based on Foata normal form. 0/347 useless extension candidates. Maximal degree in co-relation 399. Up to 14 conditions per place. [2023-09-01 05:10:25,131 INFO L82 GeneralOperation]: Start removeDead. Operand has 363 places, 381 transitions, 822 flow [2023-09-01 05:10:25,136 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 363 places, 381 transitions, 822 flow [2023-09-01 05:10:25,136 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:10:25,139 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 363 places, 381 transitions, 822 flow [2023-09-01 05:10:25,140 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 363 places, 381 transitions, 822 flow [2023-09-01 05:10:25,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 363 places, 381 transitions, 822 flow [2023-09-01 05:10:25,236 INFO L130 PetriNetUnfolder]: 37/451 cut-off events. [2023-09-01 05:10:25,236 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 05:10:25,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 451 events. 37/451 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1852 event pairs, 0 based on Foata normal form. 0/347 useless extension candidates. Maximal degree in co-relation 399. Up to 14 conditions per place. [2023-09-01 05:10:25,268 INFO L119 LiptonReduction]: Number of co-enabled transitions 111708 [2023-09-01 05:10:28,114 INFO L134 LiptonReduction]: Checked pairs total: 387419 [2023-09-01 05:10:28,114 INFO L136 LiptonReduction]: Total number of compositions: 268 [2023-09-01 05:10:28,116 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:10:28,116 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:10:28,117 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:10:28,135 INFO L130 PetriNetUnfolder]: 10/173 cut-off events. [2023-09-01 05:10:28,135 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 05:10:28,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:10:28,136 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:10:28,136 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:10:28,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:10:28,136 INFO L85 PathProgramCache]: Analyzing trace with hash 131958396, now seen corresponding path program 1 times [2023-09-01 05:10:28,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:10:28,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583141818] [2023-09-01 05:10:28,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:10:28,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:10:28,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:10:28,171 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:10:28,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:10:28,199 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:10:28,204 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:10:28,204 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:10:28,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 05:10:28,205 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:10:28,205 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:10:28,205 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:10:28,206 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-09-01 05:10:28,276 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:10:28,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 419 places, 440 transitions, 957 flow [2023-09-01 05:10:28,374 INFO L130 PetriNetUnfolder]: 43/522 cut-off events. [2023-09-01 05:10:28,375 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-09-01 05:10:28,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 572 conditions, 522 events. 43/522 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2217 event pairs, 0 based on Foata normal form. 0/401 useless extension candidates. Maximal degree in co-relation 479. Up to 16 conditions per place. [2023-09-01 05:10:28,382 INFO L82 GeneralOperation]: Start removeDead. Operand has 419 places, 440 transitions, 957 flow [2023-09-01 05:10:28,387 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 419 places, 440 transitions, 957 flow [2023-09-01 05:10:28,387 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:10:28,387 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 419 places, 440 transitions, 957 flow [2023-09-01 05:10:28,388 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 419 places, 440 transitions, 957 flow [2023-09-01 05:10:28,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 419 places, 440 transitions, 957 flow [2023-09-01 05:10:28,506 INFO L130 PetriNetUnfolder]: 43/522 cut-off events. [2023-09-01 05:10:28,506 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-09-01 05:10:28,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 572 conditions, 522 events. 43/522 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2217 event pairs, 0 based on Foata normal form. 0/401 useless extension candidates. Maximal degree in co-relation 479. Up to 16 conditions per place. [2023-09-01 05:10:28,549 INFO L119 LiptonReduction]: Number of co-enabled transitions 154280 [2023-09-01 05:10:31,957 INFO L134 LiptonReduction]: Checked pairs total: 539852 [2023-09-01 05:10:31,957 INFO L136 LiptonReduction]: Total number of compositions: 312 [2023-09-01 05:10:31,959 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:10:31,959 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:10:31,959 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:10:31,991 INFO L130 PetriNetUnfolder]: 13/208 cut-off events. [2023-09-01 05:10:31,991 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-09-01 05:10:31,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:10:31,991 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:10:31,991 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:10:31,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:10:31,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1620798577, now seen corresponding path program 1 times [2023-09-01 05:10:31,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:10:31,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194480111] [2023-09-01 05:10:31,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:10:31,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:10:32,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:10:32,012 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:10:32,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:10:32,028 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:10:32,028 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:10:32,029 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:10:32,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 05:10:32,029 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:10:32,030 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:10:32,030 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:10:32,030 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-09-01 05:10:32,096 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:10:32,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 475 places, 499 transitions, 1094 flow [2023-09-01 05:10:32,227 INFO L130 PetriNetUnfolder]: 49/593 cut-off events. [2023-09-01 05:10:32,228 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-09-01 05:10:32,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 654 conditions, 593 events. 49/593 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2547 event pairs, 0 based on Foata normal form. 0/455 useless extension candidates. Maximal degree in co-relation 560. Up to 18 conditions per place. [2023-09-01 05:10:32,239 INFO L82 GeneralOperation]: Start removeDead. Operand has 475 places, 499 transitions, 1094 flow [2023-09-01 05:10:32,247 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 475 places, 499 transitions, 1094 flow [2023-09-01 05:10:32,248 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:10:32,248 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 475 places, 499 transitions, 1094 flow [2023-09-01 05:10:32,248 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 475 places, 499 transitions, 1094 flow [2023-09-01 05:10:32,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 475 places, 499 transitions, 1094 flow [2023-09-01 05:10:32,386 INFO L130 PetriNetUnfolder]: 49/593 cut-off events. [2023-09-01 05:10:32,386 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-09-01 05:10:32,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 654 conditions, 593 events. 49/593 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2547 event pairs, 0 based on Foata normal form. 0/455 useless extension candidates. Maximal degree in co-relation 560. Up to 18 conditions per place. [2023-09-01 05:10:32,435 INFO L119 LiptonReduction]: Number of co-enabled transitions 203696 [2023-09-01 05:10:36,107 INFO L134 LiptonReduction]: Checked pairs total: 711514 [2023-09-01 05:10:36,107 INFO L136 LiptonReduction]: Total number of compositions: 359 [2023-09-01 05:10:36,109 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:10:36,110 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:10:36,110 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:10:36,139 INFO L130 PetriNetUnfolder]: 15/251 cut-off events. [2023-09-01 05:10:36,140 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-09-01 05:10:36,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:10:36,140 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:10:36,140 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:10:36,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:10:36,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1888131359, now seen corresponding path program 1 times [2023-09-01 05:10:36,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:10:36,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521626421] [2023-09-01 05:10:36,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:10:36,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:10:36,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:10:36,168 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:10:36,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:10:36,196 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:10:36,197 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:10:36,197 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:10:36,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 05:10:36,197 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:10:36,198 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:10:36,198 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:10:36,198 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-09-01 05:10:36,249 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:10:36,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 531 places, 558 transitions, 1233 flow [2023-09-01 05:10:36,425 INFO L130 PetriNetUnfolder]: 55/664 cut-off events. [2023-09-01 05:10:36,426 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-09-01 05:10:36,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 737 conditions, 664 events. 55/664 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2935 event pairs, 0 based on Foata normal form. 0/509 useless extension candidates. Maximal degree in co-relation 642. Up to 20 conditions per place. [2023-09-01 05:10:36,439 INFO L82 GeneralOperation]: Start removeDead. Operand has 531 places, 558 transitions, 1233 flow [2023-09-01 05:10:36,444 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 531 places, 558 transitions, 1233 flow [2023-09-01 05:10:36,444 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:10:36,444 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 531 places, 558 transitions, 1233 flow [2023-09-01 05:10:36,446 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 531 places, 558 transitions, 1233 flow [2023-09-01 05:10:36,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 531 places, 558 transitions, 1233 flow [2023-09-01 05:10:36,585 INFO L130 PetriNetUnfolder]: 55/664 cut-off events. [2023-09-01 05:10:36,585 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-09-01 05:10:36,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 737 conditions, 664 events. 55/664 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2935 event pairs, 0 based on Foata normal form. 0/509 useless extension candidates. Maximal degree in co-relation 642. Up to 20 conditions per place. [2023-09-01 05:10:36,635 INFO L119 LiptonReduction]: Number of co-enabled transitions 259956 [2023-09-01 05:10:40,491 INFO L134 LiptonReduction]: Checked pairs total: 900584 [2023-09-01 05:10:40,491 INFO L136 LiptonReduction]: Total number of compositions: 394 [2023-09-01 05:10:40,493 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:10:40,493 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:10:40,493 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:10:40,522 INFO L130 PetriNetUnfolder]: 15/273 cut-off events. [2023-09-01 05:10:40,522 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-09-01 05:10:40,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:10:40,523 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:10:40,523 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:10:40,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:10:40,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1485969596, now seen corresponding path program 1 times [2023-09-01 05:10:40,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:10:40,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278025242] [2023-09-01 05:10:40,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:10:40,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:10:40,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:10:40,538 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:10:40,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:10:40,554 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:10:40,554 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:10:40,554 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:10:40,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 05:10:40,555 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:10:40,555 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:10:40,555 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:10:40,555 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-09-01 05:10:40,615 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:10:40,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 587 places, 617 transitions, 1374 flow [2023-09-01 05:10:40,789 INFO L130 PetriNetUnfolder]: 61/735 cut-off events. [2023-09-01 05:10:40,789 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-09-01 05:10:40,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 821 conditions, 735 events. 61/735 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3289 event pairs, 0 based on Foata normal form. 0/563 useless extension candidates. Maximal degree in co-relation 725. Up to 22 conditions per place. [2023-09-01 05:10:40,801 INFO L82 GeneralOperation]: Start removeDead. Operand has 587 places, 617 transitions, 1374 flow [2023-09-01 05:10:40,807 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 587 places, 617 transitions, 1374 flow [2023-09-01 05:10:40,807 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:10:40,807 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 587 places, 617 transitions, 1374 flow [2023-09-01 05:10:40,807 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 587 places, 617 transitions, 1374 flow [2023-09-01 05:10:40,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 587 places, 617 transitions, 1374 flow [2023-09-01 05:10:40,979 INFO L130 PetriNetUnfolder]: 61/735 cut-off events. [2023-09-01 05:10:40,979 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-09-01 05:10:40,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 821 conditions, 735 events. 61/735 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3289 event pairs, 0 based on Foata normal form. 0/563 useless extension candidates. Maximal degree in co-relation 725. Up to 22 conditions per place. [2023-09-01 05:10:41,077 INFO L119 LiptonReduction]: Number of co-enabled transitions 323060 [2023-09-01 05:10:45,401 INFO L134 LiptonReduction]: Checked pairs total: 1110482 [2023-09-01 05:10:45,401 INFO L136 LiptonReduction]: Total number of compositions: 434 [2023-09-01 05:10:45,402 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:10:45,403 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:10:45,403 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:10:45,443 INFO L130 PetriNetUnfolder]: 17/316 cut-off events. [2023-09-01 05:10:45,444 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-09-01 05:10:45,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:10:45,444 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:10:45,444 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:10:45,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:10:45,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1747450731, now seen corresponding path program 1 times [2023-09-01 05:10:45,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:10:45,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916464252] [2023-09-01 05:10:45,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:10:45,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:10:45,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:10:45,463 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:10:45,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:10:45,481 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:10:45,482 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:10:45,482 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:10:45,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 05:10:45,482 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:10:45,483 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:10:45,483 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:10:45,483 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-09-01 05:10:45,569 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:10:45,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 643 places, 676 transitions, 1517 flow [2023-09-01 05:10:45,773 INFO L130 PetriNetUnfolder]: 67/806 cut-off events. [2023-09-01 05:10:45,773 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-09-01 05:10:45,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 906 conditions, 806 events. 67/806 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3626 event pairs, 0 based on Foata normal form. 0/617 useless extension candidates. Maximal degree in co-relation 809. Up to 24 conditions per place. [2023-09-01 05:10:45,787 INFO L82 GeneralOperation]: Start removeDead. Operand has 643 places, 676 transitions, 1517 flow [2023-09-01 05:10:45,794 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 643 places, 676 transitions, 1517 flow [2023-09-01 05:10:45,794 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:10:45,795 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 643 places, 676 transitions, 1517 flow [2023-09-01 05:10:45,795 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 643 places, 676 transitions, 1517 flow [2023-09-01 05:10:45,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 643 places, 676 transitions, 1517 flow [2023-09-01 05:10:46,023 INFO L130 PetriNetUnfolder]: 67/806 cut-off events. [2023-09-01 05:10:46,023 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-09-01 05:10:46,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 906 conditions, 806 events. 67/806 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3626 event pairs, 0 based on Foata normal form. 0/617 useless extension candidates. Maximal degree in co-relation 809. Up to 24 conditions per place. [2023-09-01 05:10:46,088 INFO L119 LiptonReduction]: Number of co-enabled transitions 393008 [2023-09-01 05:10:50,876 INFO L134 LiptonReduction]: Checked pairs total: 1359009 [2023-09-01 05:10:50,876 INFO L136 LiptonReduction]: Total number of compositions: 479 [2023-09-01 05:10:50,877 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:10:50,878 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:10:50,878 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:10:50,927 INFO L130 PetriNetUnfolder]: 19/347 cut-off events. [2023-09-01 05:10:50,927 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-09-01 05:10:50,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:10:50,928 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:10:50,928 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:10:50,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:10:50,929 INFO L85 PathProgramCache]: Analyzing trace with hash -761249396, now seen corresponding path program 1 times [2023-09-01 05:10:50,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:10:50,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516835723] [2023-09-01 05:10:50,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:10:50,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:10:50,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:10:50,965 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:10:50,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:10:50,992 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:10:50,993 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:10:50,993 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:10:50,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 05:10:50,993 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:10:50,994 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:10:50,994 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:10:50,994 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-09-01 05:10:51,089 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:10:51,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 699 places, 735 transitions, 1662 flow [2023-09-01 05:10:51,335 INFO L130 PetriNetUnfolder]: 73/877 cut-off events. [2023-09-01 05:10:51,335 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-09-01 05:10:51,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 992 conditions, 877 events. 73/877 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4022 event pairs, 0 based on Foata normal form. 0/671 useless extension candidates. Maximal degree in co-relation 894. Up to 26 conditions per place. [2023-09-01 05:10:51,360 INFO L82 GeneralOperation]: Start removeDead. Operand has 699 places, 735 transitions, 1662 flow [2023-09-01 05:10:51,368 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 699 places, 735 transitions, 1662 flow [2023-09-01 05:10:51,368 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:10:51,368 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 699 places, 735 transitions, 1662 flow [2023-09-01 05:10:51,369 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 699 places, 735 transitions, 1662 flow [2023-09-01 05:10:51,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 699 places, 735 transitions, 1662 flow [2023-09-01 05:10:51,643 INFO L130 PetriNetUnfolder]: 73/877 cut-off events. [2023-09-01 05:10:51,644 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-09-01 05:10:51,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 992 conditions, 877 events. 73/877 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4022 event pairs, 0 based on Foata normal form. 0/671 useless extension candidates. Maximal degree in co-relation 894. Up to 26 conditions per place. [2023-09-01 05:10:51,719 INFO L119 LiptonReduction]: Number of co-enabled transitions 469800 [2023-09-01 05:10:56,985 INFO L134 LiptonReduction]: Checked pairs total: 1647738 [2023-09-01 05:10:56,985 INFO L136 LiptonReduction]: Total number of compositions: 518 [2023-09-01 05:10:56,986 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:10:56,987 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:10:56,987 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:10:57,046 INFO L130 PetriNetUnfolder]: 25/382 cut-off events. [2023-09-01 05:10:57,046 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-09-01 05:10:57,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:10:57,047 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:10:57,047 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:10:57,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:10:57,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1887202299, now seen corresponding path program 1 times [2023-09-01 05:10:57,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:10:57,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762495282] [2023-09-01 05:10:57,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:10:57,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:10:57,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:10:57,067 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:10:57,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:10:57,085 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:10:57,086 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:10:57,086 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:10:57,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 05:10:57,086 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:10:57,087 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:10:57,087 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:10:57,087 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-09-01 05:10:57,160 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:10:57,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 755 places, 794 transitions, 1809 flow [2023-09-01 05:10:57,463 INFO L130 PetriNetUnfolder]: 79/948 cut-off events. [2023-09-01 05:10:57,464 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-09-01 05:10:57,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1079 conditions, 948 events. 79/948 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4348 event pairs, 0 based on Foata normal form. 0/725 useless extension candidates. Maximal degree in co-relation 980. Up to 28 conditions per place. [2023-09-01 05:10:57,489 INFO L82 GeneralOperation]: Start removeDead. Operand has 755 places, 794 transitions, 1809 flow [2023-09-01 05:10:57,497 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 755 places, 794 transitions, 1809 flow [2023-09-01 05:10:57,498 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:10:57,498 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 755 places, 794 transitions, 1809 flow [2023-09-01 05:10:57,498 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 755 places, 794 transitions, 1809 flow [2023-09-01 05:10:57,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 755 places, 794 transitions, 1809 flow [2023-09-01 05:10:57,777 INFO L130 PetriNetUnfolder]: 79/948 cut-off events. [2023-09-01 05:10:57,777 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-09-01 05:10:57,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1079 conditions, 948 events. 79/948 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4348 event pairs, 0 based on Foata normal form. 0/725 useless extension candidates. Maximal degree in co-relation 980. Up to 28 conditions per place. [2023-09-01 05:10:57,949 INFO L119 LiptonReduction]: Number of co-enabled transitions 553436 [2023-09-01 05:11:04,059 INFO L134 LiptonReduction]: Checked pairs total: 1960481 [2023-09-01 05:11:04,059 INFO L136 LiptonReduction]: Total number of compositions: 561 [2023-09-01 05:11:04,060 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:11:04,061 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:11:04,061 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:11:04,125 INFO L130 PetriNetUnfolder]: 30/431 cut-off events. [2023-09-01 05:11:04,126 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-09-01 05:11:04,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:11:04,126 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:11:04,126 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:11:04,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:11:04,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1345977243, now seen corresponding path program 1 times [2023-09-01 05:11:04,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:11:04,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7334618] [2023-09-01 05:11:04,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:11:04,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:11:04,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:11:04,150 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:11:04,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:11:04,170 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:11:04,170 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:11:04,170 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:11:04,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 05:11:04,171 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:11:04,171 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:11:04,171 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:11:04,171 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-09-01 05:11:04,258 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:11:04,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 811 places, 853 transitions, 1958 flow [2023-09-01 05:11:04,646 INFO L130 PetriNetUnfolder]: 85/1019 cut-off events. [2023-09-01 05:11:04,646 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-09-01 05:11:04,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1167 conditions, 1019 events. 85/1019 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4748 event pairs, 0 based on Foata normal form. 0/779 useless extension candidates. Maximal degree in co-relation 1067. Up to 30 conditions per place. [2023-09-01 05:11:04,665 INFO L82 GeneralOperation]: Start removeDead. Operand has 811 places, 853 transitions, 1958 flow [2023-09-01 05:11:04,674 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 811 places, 853 transitions, 1958 flow [2023-09-01 05:11:04,674 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:11:04,674 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 811 places, 853 transitions, 1958 flow [2023-09-01 05:11:04,674 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 811 places, 853 transitions, 1958 flow [2023-09-01 05:11:04,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 811 places, 853 transitions, 1958 flow [2023-09-01 05:11:05,003 INFO L130 PetriNetUnfolder]: 85/1019 cut-off events. [2023-09-01 05:11:05,003 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-09-01 05:11:05,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1167 conditions, 1019 events. 85/1019 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4748 event pairs, 0 based on Foata normal form. 0/779 useless extension candidates. Maximal degree in co-relation 1067. Up to 30 conditions per place. [2023-09-01 05:11:05,120 INFO L119 LiptonReduction]: Number of co-enabled transitions 643916 [2023-09-01 05:11:11,458 INFO L134 LiptonReduction]: Checked pairs total: 2262132 [2023-09-01 05:11:11,458 INFO L136 LiptonReduction]: Total number of compositions: 598 [2023-09-01 05:11:11,460 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:11:11,460 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:11:11,460 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:11:11,518 INFO L130 PetriNetUnfolder]: 29/458 cut-off events. [2023-09-01 05:11:11,518 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-09-01 05:11:11,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:11:11,518 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:11:11,518 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:11:11,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:11:11,518 INFO L85 PathProgramCache]: Analyzing trace with hash -942422583, now seen corresponding path program 1 times [2023-09-01 05:11:11,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:11:11,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58466221] [2023-09-01 05:11:11,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:11:11,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:11:11,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:11:11,568 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:11:11,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:11:11,599 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:11:11,599 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:11:11,599 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:11:11,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-09-01 05:11:11,600 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:11:11,600 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:11:11,600 WARN L233 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:11:11,600 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2023-09-01 05:11:11,704 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:11:11,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 867 places, 912 transitions, 2109 flow [2023-09-01 05:11:12,015 INFO L130 PetriNetUnfolder]: 91/1090 cut-off events. [2023-09-01 05:11:12,016 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-09-01 05:11:12,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1256 conditions, 1090 events. 91/1090 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 5142 event pairs, 0 based on Foata normal form. 0/833 useless extension candidates. Maximal degree in co-relation 1155. Up to 32 conditions per place. [2023-09-01 05:11:12,042 INFO L82 GeneralOperation]: Start removeDead. Operand has 867 places, 912 transitions, 2109 flow [2023-09-01 05:11:12,051 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 867 places, 912 transitions, 2109 flow [2023-09-01 05:11:12,051 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:11:12,052 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 867 places, 912 transitions, 2109 flow [2023-09-01 05:11:12,052 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 867 places, 912 transitions, 2109 flow [2023-09-01 05:11:12,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 867 places, 912 transitions, 2109 flow [2023-09-01 05:11:12,375 INFO L130 PetriNetUnfolder]: 91/1090 cut-off events. [2023-09-01 05:11:12,375 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-09-01 05:11:12,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1256 conditions, 1090 events. 91/1090 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 5142 event pairs, 0 based on Foata normal form. 0/833 useless extension candidates. Maximal degree in co-relation 1155. Up to 32 conditions per place. [2023-09-01 05:11:12,489 INFO L119 LiptonReduction]: Number of co-enabled transitions 741240 [2023-09-01 05:11:19,088 INFO L134 LiptonReduction]: Checked pairs total: 2621448 [2023-09-01 05:11:19,088 INFO L136 LiptonReduction]: Total number of compositions: 645 [2023-09-01 05:11:19,090 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:11:19,090 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:11:19,090 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:11:19,181 INFO L130 PetriNetUnfolder]: 31/493 cut-off events. [2023-09-01 05:11:19,181 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-09-01 05:11:19,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:11:19,181 INFO L208 CegarLoopForPetriNet]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:11:19,181 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:11:19,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:11:19,182 INFO L85 PathProgramCache]: Analyzing trace with hash -847594686, now seen corresponding path program 1 times [2023-09-01 05:11:19,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:11:19,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797920478] [2023-09-01 05:11:19,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:11:19,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:11:19,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:11:19,206 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:11:19,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:11:19,233 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:11:19,234 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:11:19,234 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:11:19,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-09-01 05:11:19,234 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:11:19,235 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:11:19,235 WARN L233 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:11:19,235 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2023-09-01 05:11:19,321 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:11:19,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 923 places, 971 transitions, 2262 flow [2023-09-01 05:11:19,652 INFO L130 PetriNetUnfolder]: 97/1161 cut-off events. [2023-09-01 05:11:19,652 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-09-01 05:11:19,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1346 conditions, 1161 events. 97/1161 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 5491 event pairs, 0 based on Foata normal form. 0/887 useless extension candidates. Maximal degree in co-relation 1244. Up to 34 conditions per place. [2023-09-01 05:11:19,682 INFO L82 GeneralOperation]: Start removeDead. Operand has 923 places, 971 transitions, 2262 flow [2023-09-01 05:11:19,692 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 923 places, 971 transitions, 2262 flow [2023-09-01 05:11:19,693 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:11:19,693 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 923 places, 971 transitions, 2262 flow [2023-09-01 05:11:19,693 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 923 places, 971 transitions, 2262 flow [2023-09-01 05:11:19,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 923 places, 971 transitions, 2262 flow [2023-09-01 05:11:20,093 INFO L130 PetriNetUnfolder]: 97/1161 cut-off events. [2023-09-01 05:11:20,094 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-09-01 05:11:20,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1346 conditions, 1161 events. 97/1161 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 5491 event pairs, 0 based on Foata normal form. 0/887 useless extension candidates. Maximal degree in co-relation 1244. Up to 34 conditions per place. [2023-09-01 05:11:20,272 INFO L119 LiptonReduction]: Number of co-enabled transitions 845408 [2023-09-01 05:11:27,220 INFO L134 LiptonReduction]: Checked pairs total: 2987348 [2023-09-01 05:11:27,220 INFO L136 LiptonReduction]: Total number of compositions: 689 [2023-09-01 05:11:27,225 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:11:27,226 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:11:27,226 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:11:27,304 INFO L130 PetriNetUnfolder]: 32/526 cut-off events. [2023-09-01 05:11:27,304 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-09-01 05:11:27,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:11:27,305 INFO L208 CegarLoopForPetriNet]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:11:27,305 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:11:27,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:11:27,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1946253957, now seen corresponding path program 1 times [2023-09-01 05:11:27,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:11:27,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101924347] [2023-09-01 05:11:27,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:11:27,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:11:27,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:11:27,327 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:11:27,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:11:27,355 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:11:27,356 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:11:27,356 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:11:27,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-09-01 05:11:27,356 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:11:27,357 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:11:27,357 WARN L233 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:11:27,357 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2023-09-01 05:11:27,447 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:11:27,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 979 places, 1030 transitions, 2417 flow [2023-09-01 05:11:27,837 INFO L130 PetriNetUnfolder]: 103/1232 cut-off events. [2023-09-01 05:11:27,837 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-09-01 05:11:27,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1437 conditions, 1232 events. 103/1232 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 5842 event pairs, 0 based on Foata normal form. 0/941 useless extension candidates. Maximal degree in co-relation 1334. Up to 36 conditions per place. [2023-09-01 05:11:27,874 INFO L82 GeneralOperation]: Start removeDead. Operand has 979 places, 1030 transitions, 2417 flow [2023-09-01 05:11:27,885 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 979 places, 1030 transitions, 2417 flow [2023-09-01 05:11:27,886 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:11:27,886 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 979 places, 1030 transitions, 2417 flow [2023-09-01 05:11:27,886 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 979 places, 1030 transitions, 2417 flow [2023-09-01 05:11:27,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 979 places, 1030 transitions, 2417 flow [2023-09-01 05:11:28,328 INFO L130 PetriNetUnfolder]: 103/1232 cut-off events. [2023-09-01 05:11:28,328 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-09-01 05:11:28,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1437 conditions, 1232 events. 103/1232 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 5842 event pairs, 0 based on Foata normal form. 0/941 useless extension candidates. Maximal degree in co-relation 1334. Up to 36 conditions per place. [2023-09-01 05:11:28,497 INFO L119 LiptonReduction]: Number of co-enabled transitions 956420 [2023-09-01 05:11:36,387 INFO L134 LiptonReduction]: Checked pairs total: 3395234 [2023-09-01 05:11:36,387 INFO L136 LiptonReduction]: Total number of compositions: 725 [2023-09-01 05:11:36,389 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:11:36,390 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:11:36,391 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:11:36,517 INFO L130 PetriNetUnfolder]: 39/569 cut-off events. [2023-09-01 05:11:36,518 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-09-01 05:11:36,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:11:36,518 INFO L208 CegarLoopForPetriNet]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:11:36,518 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:11:36,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:11:36,518 INFO L85 PathProgramCache]: Analyzing trace with hash 602674503, now seen corresponding path program 1 times [2023-09-01 05:11:36,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:11:36,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279566605] [2023-09-01 05:11:36,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:11:36,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:11:36,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:11:36,545 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:11:36,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:11:36,575 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:11:36,575 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:11:36,575 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:11:36,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-09-01 05:11:36,576 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:11:36,576 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:11:36,576 WARN L233 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:11:36,576 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2023-09-01 05:11:36,667 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:11:36,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1035 places, 1089 transitions, 2574 flow [2023-09-01 05:11:37,115 INFO L130 PetriNetUnfolder]: 109/1303 cut-off events. [2023-09-01 05:11:37,115 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-09-01 05:11:37,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1529 conditions, 1303 events. 109/1303 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 6169 event pairs, 0 based on Foata normal form. 0/995 useless extension candidates. Maximal degree in co-relation 1425. Up to 38 conditions per place. [2023-09-01 05:11:37,160 INFO L82 GeneralOperation]: Start removeDead. Operand has 1035 places, 1089 transitions, 2574 flow [2023-09-01 05:11:37,172 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1035 places, 1089 transitions, 2574 flow [2023-09-01 05:11:37,173 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:11:37,173 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1035 places, 1089 transitions, 2574 flow [2023-09-01 05:11:37,173 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1035 places, 1089 transitions, 2574 flow [2023-09-01 05:11:37,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1035 places, 1089 transitions, 2574 flow [2023-09-01 05:11:37,656 INFO L130 PetriNetUnfolder]: 109/1303 cut-off events. [2023-09-01 05:11:37,656 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-09-01 05:11:37,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1529 conditions, 1303 events. 109/1303 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 6169 event pairs, 0 based on Foata normal form. 0/995 useless extension candidates. Maximal degree in co-relation 1425. Up to 38 conditions per place. [2023-09-01 05:11:37,830 INFO L119 LiptonReduction]: Number of co-enabled transitions 1074276 [2023-09-01 05:11:45,929 INFO L134 LiptonReduction]: Checked pairs total: 3805167 [2023-09-01 05:11:45,929 INFO L136 LiptonReduction]: Total number of compositions: 769 [2023-09-01 05:11:45,931 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:11:45,931 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:11:45,931 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:11:46,076 INFO L130 PetriNetUnfolder]: 40/601 cut-off events. [2023-09-01 05:11:46,076 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-09-01 05:11:46,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:11:46,077 INFO L208 CegarLoopForPetriNet]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:11:46,077 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:11:46,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:11:46,077 INFO L85 PathProgramCache]: Analyzing trace with hash 32519291, now seen corresponding path program 1 times [2023-09-01 05:11:46,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:11:46,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712393208] [2023-09-01 05:11:46,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:11:46,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:11:46,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:11:46,110 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:11:46,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:11:46,145 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:11:46,145 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:11:46,145 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:11:46,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-09-01 05:11:46,146 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:11:46,146 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:11:46,146 WARN L233 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:11:46,147 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2023-09-01 05:11:46,272 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:11:46,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1091 places, 1148 transitions, 2733 flow [2023-09-01 05:11:46,830 INFO L130 PetriNetUnfolder]: 115/1374 cut-off events. [2023-09-01 05:11:46,830 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-09-01 05:11:46,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1622 conditions, 1374 events. 115/1374 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 6588 event pairs, 0 based on Foata normal form. 0/1049 useless extension candidates. Maximal degree in co-relation 1517. Up to 40 conditions per place. [2023-09-01 05:11:46,878 INFO L82 GeneralOperation]: Start removeDead. Operand has 1091 places, 1148 transitions, 2733 flow [2023-09-01 05:11:46,891 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1091 places, 1148 transitions, 2733 flow [2023-09-01 05:11:46,891 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:11:46,891 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1091 places, 1148 transitions, 2733 flow [2023-09-01 05:11:46,892 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1091 places, 1148 transitions, 2733 flow [2023-09-01 05:11:46,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1091 places, 1148 transitions, 2733 flow [2023-09-01 05:11:47,339 INFO L130 PetriNetUnfolder]: 115/1374 cut-off events. [2023-09-01 05:11:47,339 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-09-01 05:11:47,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1622 conditions, 1374 events. 115/1374 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 6588 event pairs, 0 based on Foata normal form. 0/1049 useless extension candidates. Maximal degree in co-relation 1517. Up to 40 conditions per place. [2023-09-01 05:11:47,653 INFO L119 LiptonReduction]: Number of co-enabled transitions 1198976 [2023-09-01 05:11:56,255 INFO L134 LiptonReduction]: Checked pairs total: 4241293 [2023-09-01 05:11:56,256 INFO L136 LiptonReduction]: Total number of compositions: 803 [2023-09-01 05:11:56,258 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:11:56,258 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:11:56,258 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:11:56,423 INFO L130 PetriNetUnfolder]: 40/632 cut-off events. [2023-09-01 05:11:56,423 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-09-01 05:11:56,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:11:56,424 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:11:56,424 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:11:56,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:11:56,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1642481169, now seen corresponding path program 1 times [2023-09-01 05:11:56,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:11:56,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138476815] [2023-09-01 05:11:56,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:11:56,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:11:56,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:11:56,471 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:11:56,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:11:56,528 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:11:56,528 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:11:56,528 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:11:56,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-09-01 05:11:56,528 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:11:56,529 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:11:56,529 WARN L233 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:11:56,529 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2023-09-01 05:11:56,630 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:11:56,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1147 places, 1207 transitions, 2894 flow [2023-09-01 05:11:57,138 INFO L130 PetriNetUnfolder]: 121/1445 cut-off events. [2023-09-01 05:11:57,138 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-09-01 05:11:57,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1716 conditions, 1445 events. 121/1445 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 6932 event pairs, 0 based on Foata normal form. 0/1103 useless extension candidates. Maximal degree in co-relation 1610. Up to 42 conditions per place. [2023-09-01 05:11:57,193 INFO L82 GeneralOperation]: Start removeDead. Operand has 1147 places, 1207 transitions, 2894 flow [2023-09-01 05:11:57,209 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1147 places, 1207 transitions, 2894 flow [2023-09-01 05:11:57,209 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:11:57,209 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1147 places, 1207 transitions, 2894 flow [2023-09-01 05:11:57,209 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1147 places, 1207 transitions, 2894 flow [2023-09-01 05:11:57,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1147 places, 1207 transitions, 2894 flow [2023-09-01 05:11:57,766 INFO L130 PetriNetUnfolder]: 121/1445 cut-off events. [2023-09-01 05:11:57,766 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-09-01 05:11:57,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1716 conditions, 1445 events. 121/1445 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 6932 event pairs, 0 based on Foata normal form. 0/1103 useless extension candidates. Maximal degree in co-relation 1610. Up to 42 conditions per place. [2023-09-01 05:11:57,984 INFO L119 LiptonReduction]: Number of co-enabled transitions 1330520 [2023-09-01 05:12:07,259 INFO L134 LiptonReduction]: Checked pairs total: 4592370 [2023-09-01 05:12:07,259 INFO L136 LiptonReduction]: Total number of compositions: 840 [2023-09-01 05:12:07,262 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:12:07,262 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:12:07,262 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:12:07,439 INFO L130 PetriNetUnfolder]: 37/655 cut-off events. [2023-09-01 05:12:07,439 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-09-01 05:12:07,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:12:07,440 INFO L208 CegarLoopForPetriNet]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:12:07,440 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:12:07,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:12:07,440 INFO L85 PathProgramCache]: Analyzing trace with hash 454953065, now seen corresponding path program 1 times [2023-09-01 05:12:07,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:12:07,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918499713] [2023-09-01 05:12:07,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:12:07,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:12:07,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:12:07,473 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:12:07,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:12:07,515 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:12:07,515 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:12:07,515 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:12:07,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-09-01 05:12:07,516 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:12:07,516 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:12:07,516 WARN L233 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:12:07,516 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2023-09-01 05:12:07,664 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:12:07,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1203 places, 1266 transitions, 3057 flow [2023-09-01 05:12:08,315 INFO L130 PetriNetUnfolder]: 127/1516 cut-off events. [2023-09-01 05:12:08,315 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-09-01 05:12:08,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1811 conditions, 1516 events. 127/1516 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 7323 event pairs, 0 based on Foata normal form. 0/1157 useless extension candidates. Maximal degree in co-relation 1704. Up to 44 conditions per place. [2023-09-01 05:12:08,373 INFO L82 GeneralOperation]: Start removeDead. Operand has 1203 places, 1266 transitions, 3057 flow [2023-09-01 05:12:08,390 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1203 places, 1266 transitions, 3057 flow [2023-09-01 05:12:08,391 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:12:08,391 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1203 places, 1266 transitions, 3057 flow [2023-09-01 05:12:08,391 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1203 places, 1266 transitions, 3057 flow [2023-09-01 05:12:08,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1203 places, 1266 transitions, 3057 flow [2023-09-01 05:12:09,037 INFO L130 PetriNetUnfolder]: 127/1516 cut-off events. [2023-09-01 05:12:09,038 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-09-01 05:12:09,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1811 conditions, 1516 events. 127/1516 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 7323 event pairs, 0 based on Foata normal form. 0/1157 useless extension candidates. Maximal degree in co-relation 1704. Up to 44 conditions per place. [2023-09-01 05:12:09,268 INFO L119 LiptonReduction]: Number of co-enabled transitions 1468908 [2023-09-01 05:12:19,373 INFO L134 LiptonReduction]: Checked pairs total: 5187036 [2023-09-01 05:12:19,373 INFO L136 LiptonReduction]: Total number of compositions: 893 [2023-09-01 05:12:19,375 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:12:19,375 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:12:19,375 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:12:19,498 INFO L130 PetriNetUnfolder]: 44/699 cut-off events. [2023-09-01 05:12:19,498 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-09-01 05:12:19,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:12:19,498 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:12:19,498 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:12:19,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:12:19,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1021263442, now seen corresponding path program 1 times [2023-09-01 05:12:19,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:12:19,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441511287] [2023-09-01 05:12:19,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:12:19,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:12:19,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:12:19,526 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:12:19,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:12:19,566 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:12:19,566 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:12:19,566 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:12:19,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-09-01 05:12:19,567 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:12:19,567 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:12:19,567 WARN L233 ceAbstractionStarter]: 21 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:12:19,567 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 22 thread instances. [2023-09-01 05:12:19,679 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:12:19,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1259 places, 1325 transitions, 3222 flow [2023-09-01 05:12:20,377 INFO L130 PetriNetUnfolder]: 133/1587 cut-off events. [2023-09-01 05:12:20,378 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-09-01 05:12:20,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1907 conditions, 1587 events. 133/1587 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 7678 event pairs, 0 based on Foata normal form. 0/1211 useless extension candidates. Maximal degree in co-relation 1799. Up to 46 conditions per place. [2023-09-01 05:12:20,433 INFO L82 GeneralOperation]: Start removeDead. Operand has 1259 places, 1325 transitions, 3222 flow [2023-09-01 05:12:20,448 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1259 places, 1325 transitions, 3222 flow [2023-09-01 05:12:20,448 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:12:20,448 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1259 places, 1325 transitions, 3222 flow [2023-09-01 05:12:20,449 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1259 places, 1325 transitions, 3222 flow [2023-09-01 05:12:20,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1259 places, 1325 transitions, 3222 flow [2023-09-01 05:12:21,011 INFO L130 PetriNetUnfolder]: 133/1587 cut-off events. [2023-09-01 05:12:21,011 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-09-01 05:12:21,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1907 conditions, 1587 events. 133/1587 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 7678 event pairs, 0 based on Foata normal form. 0/1211 useless extension candidates. Maximal degree in co-relation 1799. Up to 46 conditions per place. [2023-09-01 05:12:21,345 INFO L119 LiptonReduction]: Number of co-enabled transitions 1614140 [2023-09-01 05:12:31,998 INFO L134 LiptonReduction]: Checked pairs total: 5715253 [2023-09-01 05:12:31,999 INFO L136 LiptonReduction]: Total number of compositions: 944 [2023-09-01 05:12:32,000 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:12:32,001 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:12:32,001 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:12:32,148 INFO L130 PetriNetUnfolder]: 46/734 cut-off events. [2023-09-01 05:12:32,149 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-09-01 05:12:32,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:12:32,149 INFO L208 CegarLoopForPetriNet]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:12:32,149 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:12:32,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:12:32,149 INFO L85 PathProgramCache]: Analyzing trace with hash 437481352, now seen corresponding path program 1 times [2023-09-01 05:12:32,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:12:32,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119526130] [2023-09-01 05:12:32,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:12:32,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:12:32,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:12:32,182 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:12:32,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:12:32,224 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:12:32,225 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:12:32,225 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:12:32,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-09-01 05:12:32,225 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:12:32,226 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:12:32,226 WARN L233 ceAbstractionStarter]: 22 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:12:32,226 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 23 thread instances. [2023-09-01 05:12:32,348 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:12:32,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1315 places, 1384 transitions, 3389 flow [2023-09-01 05:12:33,085 INFO L130 PetriNetUnfolder]: 139/1658 cut-off events. [2023-09-01 05:12:33,086 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-09-01 05:12:33,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2004 conditions, 1658 events. 139/1658 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 8038 event pairs, 0 based on Foata normal form. 0/1265 useless extension candidates. Maximal degree in co-relation 1895. Up to 48 conditions per place. [2023-09-01 05:12:33,136 INFO L82 GeneralOperation]: Start removeDead. Operand has 1315 places, 1384 transitions, 3389 flow [2023-09-01 05:12:33,150 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1315 places, 1384 transitions, 3389 flow [2023-09-01 05:12:33,150 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:12:33,150 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1315 places, 1384 transitions, 3389 flow [2023-09-01 05:12:33,150 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1315 places, 1384 transitions, 3389 flow [2023-09-01 05:12:33,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1315 places, 1384 transitions, 3389 flow [2023-09-01 05:12:33,769 INFO L130 PetriNetUnfolder]: 139/1658 cut-off events. [2023-09-01 05:12:33,770 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-09-01 05:12:33,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2004 conditions, 1658 events. 139/1658 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 8038 event pairs, 0 based on Foata normal form. 0/1265 useless extension candidates. Maximal degree in co-relation 1895. Up to 48 conditions per place. [2023-09-01 05:12:34,145 INFO L119 LiptonReduction]: Number of co-enabled transitions 1766216 [2023-09-01 05:12:45,319 INFO L134 LiptonReduction]: Checked pairs total: 6238002 [2023-09-01 05:12:45,319 INFO L136 LiptonReduction]: Total number of compositions: 969 [2023-09-01 05:12:45,321 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:12:45,321 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:12:45,321 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:12:45,470 INFO L130 PetriNetUnfolder]: 49/768 cut-off events. [2023-09-01 05:12:45,470 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-09-01 05:12:45,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:12:45,470 INFO L208 CegarLoopForPetriNet]: trace histogram [24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:12:45,470 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:12:45,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:12:45,471 INFO L85 PathProgramCache]: Analyzing trace with hash 328129434, now seen corresponding path program 1 times [2023-09-01 05:12:45,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:12:45,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772154663] [2023-09-01 05:12:45,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:12:45,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:12:45,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:12:45,506 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:12:45,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:12:45,550 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:12:45,550 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:12:45,550 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:12:45,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-09-01 05:12:45,551 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:12:45,551 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:12:45,551 WARN L233 ceAbstractionStarter]: 23 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:12:45,551 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 24 thread instances. [2023-09-01 05:12:45,677 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:12:45,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1371 places, 1443 transitions, 3558 flow [2023-09-01 05:12:46,383 INFO L130 PetriNetUnfolder]: 145/1729 cut-off events. [2023-09-01 05:12:46,383 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-09-01 05:12:46,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2102 conditions, 1729 events. 145/1729 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 8354 event pairs, 0 based on Foata normal form. 0/1319 useless extension candidates. Maximal degree in co-relation 1992. Up to 50 conditions per place. [2023-09-01 05:12:46,462 INFO L82 GeneralOperation]: Start removeDead. Operand has 1371 places, 1443 transitions, 3558 flow [2023-09-01 05:12:46,485 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1371 places, 1443 transitions, 3558 flow [2023-09-01 05:12:46,485 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:12:46,485 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1371 places, 1443 transitions, 3558 flow [2023-09-01 05:12:46,485 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1371 places, 1443 transitions, 3558 flow [2023-09-01 05:12:46,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1371 places, 1443 transitions, 3558 flow [2023-09-01 05:12:47,257 INFO L130 PetriNetUnfolder]: 145/1729 cut-off events. [2023-09-01 05:12:47,257 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-09-01 05:12:47,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2102 conditions, 1729 events. 145/1729 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 8354 event pairs, 0 based on Foata normal form. 0/1319 useless extension candidates. Maximal degree in co-relation 1992. Up to 50 conditions per place. [2023-09-01 05:12:47,579 INFO L119 LiptonReduction]: Number of co-enabled transitions 1925136 [2023-09-01 05:12:59,517 INFO L134 LiptonReduction]: Checked pairs total: 6904424 [2023-09-01 05:12:59,517 INFO L136 LiptonReduction]: Total number of compositions: 1016 [2023-09-01 05:12:59,519 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:12:59,519 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:12:59,519 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:12:59,689 INFO L130 PetriNetUnfolder]: 55/812 cut-off events. [2023-09-01 05:12:59,689 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-09-01 05:12:59,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:12:59,689 INFO L208 CegarLoopForPetriNet]: trace histogram [25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:12:59,690 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:12:59,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:12:59,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1498104230, now seen corresponding path program 1 times [2023-09-01 05:12:59,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:12:59,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121075724] [2023-09-01 05:12:59,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:12:59,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:12:59,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:12:59,725 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:12:59,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:12:59,771 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:12:59,771 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:12:59,771 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:12:59,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-09-01 05:12:59,772 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:12:59,772 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:12:59,772 WARN L233 ceAbstractionStarter]: 24 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:12:59,772 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 25 thread instances. [2023-09-01 05:12:59,910 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:12:59,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1427 places, 1502 transitions, 3729 flow [2023-09-01 05:13:00,789 INFO L130 PetriNetUnfolder]: 151/1800 cut-off events. [2023-09-01 05:13:00,789 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-09-01 05:13:00,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2201 conditions, 1800 events. 151/1800 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 8764 event pairs, 0 based on Foata normal form. 0/1373 useless extension candidates. Maximal degree in co-relation 2090. Up to 52 conditions per place. [2023-09-01 05:13:00,859 INFO L82 GeneralOperation]: Start removeDead. Operand has 1427 places, 1502 transitions, 3729 flow [2023-09-01 05:13:00,879 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1427 places, 1502 transitions, 3729 flow [2023-09-01 05:13:00,879 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:13:00,879 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1427 places, 1502 transitions, 3729 flow [2023-09-01 05:13:00,879 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1427 places, 1502 transitions, 3729 flow [2023-09-01 05:13:00,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1427 places, 1502 transitions, 3729 flow [2023-09-01 05:13:01,661 INFO L130 PetriNetUnfolder]: 151/1800 cut-off events. [2023-09-01 05:13:01,662 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-09-01 05:13:01,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2201 conditions, 1800 events. 151/1800 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 8764 event pairs, 0 based on Foata normal form. 0/1373 useless extension candidates. Maximal degree in co-relation 2090. Up to 52 conditions per place. [2023-09-01 05:13:02,141 INFO L119 LiptonReduction]: Number of co-enabled transitions 2090900 [2023-09-01 05:13:14,924 INFO L134 LiptonReduction]: Checked pairs total: 7341930 [2023-09-01 05:13:14,924 INFO L136 LiptonReduction]: Total number of compositions: 1052 [2023-09-01 05:13:14,925 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:13:14,925 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:13:14,926 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:13:15,103 INFO L130 PetriNetUnfolder]: 52/835 cut-off events. [2023-09-01 05:13:15,103 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-09-01 05:13:15,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:13:15,103 INFO L208 CegarLoopForPetriNet]: trace histogram [26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:13:15,103 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:13:15,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:13:15,104 INFO L85 PathProgramCache]: Analyzing trace with hash -256352414, now seen corresponding path program 1 times [2023-09-01 05:13:15,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:13:15,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489386678] [2023-09-01 05:13:15,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:13:15,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:13:15,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:13:15,135 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:13:15,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:13:15,184 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:13:15,184 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:13:15,184 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:13:15,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-09-01 05:13:15,184 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:13:15,185 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:13:15,185 WARN L233 ceAbstractionStarter]: 25 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:13:15,185 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 26 thread instances. [2023-09-01 05:13:15,323 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:13:15,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1483 places, 1561 transitions, 3902 flow [2023-09-01 05:13:16,316 INFO L130 PetriNetUnfolder]: 157/1871 cut-off events. [2023-09-01 05:13:16,317 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-09-01 05:13:16,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2301 conditions, 1871 events. 157/1871 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 9082 event pairs, 0 based on Foata normal form. 0/1427 useless extension candidates. Maximal degree in co-relation 2189. Up to 54 conditions per place. [2023-09-01 05:13:16,388 INFO L82 GeneralOperation]: Start removeDead. Operand has 1483 places, 1561 transitions, 3902 flow [2023-09-01 05:13:16,407 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1483 places, 1561 transitions, 3902 flow [2023-09-01 05:13:16,407 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:13:16,407 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1483 places, 1561 transitions, 3902 flow [2023-09-01 05:13:16,407 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1483 places, 1561 transitions, 3902 flow [2023-09-01 05:13:16,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1483 places, 1561 transitions, 3902 flow [2023-09-01 05:13:17,337 INFO L130 PetriNetUnfolder]: 157/1871 cut-off events. [2023-09-01 05:13:17,338 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-09-01 05:13:17,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2301 conditions, 1871 events. 157/1871 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 9082 event pairs, 0 based on Foata normal form. 0/1427 useless extension candidates. Maximal degree in co-relation 2189. Up to 54 conditions per place. [2023-09-01 05:13:17,859 INFO L119 LiptonReduction]: Number of co-enabled transitions 2263508 [2023-09-01 05:13:31,197 INFO L134 LiptonReduction]: Checked pairs total: 8090662 [2023-09-01 05:13:31,198 INFO L136 LiptonReduction]: Total number of compositions: 1110 [2023-09-01 05:13:31,200 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:13:31,200 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:13:31,200 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:13:31,402 INFO L130 PetriNetUnfolder]: 60/874 cut-off events. [2023-09-01 05:13:31,402 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-09-01 05:13:31,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:13:31,403 INFO L208 CegarLoopForPetriNet]: trace histogram [27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:13:31,403 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:13:31,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:13:31,403 INFO L85 PathProgramCache]: Analyzing trace with hash -429397688, now seen corresponding path program 1 times [2023-09-01 05:13:31,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:13:31,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121516830] [2023-09-01 05:13:31,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:13:31,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:13:31,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:13:31,442 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:13:31,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:13:31,492 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:13:31,492 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:13:31,492 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:13:31,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-09-01 05:13:31,493 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:13:31,493 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:13:31,493 WARN L233 ceAbstractionStarter]: 26 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:13:31,493 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 27 thread instances. [2023-09-01 05:13:31,611 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:13:31,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1539 places, 1620 transitions, 4077 flow [2023-09-01 05:13:32,744 INFO L130 PetriNetUnfolder]: 163/1942 cut-off events. [2023-09-01 05:13:32,744 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-09-01 05:13:32,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2402 conditions, 1942 events. 163/1942 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 9470 event pairs, 0 based on Foata normal form. 0/1481 useless extension candidates. Maximal degree in co-relation 2289. Up to 56 conditions per place. [2023-09-01 05:13:32,817 INFO L82 GeneralOperation]: Start removeDead. Operand has 1539 places, 1620 transitions, 4077 flow [2023-09-01 05:13:32,836 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1539 places, 1620 transitions, 4077 flow [2023-09-01 05:13:32,836 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:13:32,836 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1539 places, 1620 transitions, 4077 flow [2023-09-01 05:13:32,837 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1539 places, 1620 transitions, 4077 flow [2023-09-01 05:13:32,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1539 places, 1620 transitions, 4077 flow [2023-09-01 05:13:33,812 INFO L130 PetriNetUnfolder]: 163/1942 cut-off events. [2023-09-01 05:13:33,812 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-09-01 05:13:33,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2402 conditions, 1942 events. 163/1942 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 9470 event pairs, 0 based on Foata normal form. 0/1481 useless extension candidates. Maximal degree in co-relation 2289. Up to 56 conditions per place. [2023-09-01 05:13:34,412 INFO L119 LiptonReduction]: Number of co-enabled transitions 2442960 [2023-09-01 05:13:48,306 INFO L134 LiptonReduction]: Checked pairs total: 8710436 [2023-09-01 05:13:48,306 INFO L136 LiptonReduction]: Total number of compositions: 1147 [2023-09-01 05:13:48,307 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:13:48,308 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:13:48,308 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:13:48,528 INFO L130 PetriNetUnfolder]: 61/915 cut-off events. [2023-09-01 05:13:48,528 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-09-01 05:13:48,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:13:48,529 INFO L208 CegarLoopForPetriNet]: trace histogram [28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:13:48,529 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:13:48,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:13:48,529 INFO L85 PathProgramCache]: Analyzing trace with hash 2132880193, now seen corresponding path program 1 times [2023-09-01 05:13:48,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:13:48,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175045586] [2023-09-01 05:13:48,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:13:48,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:13:48,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:13:48,563 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:13:48,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:13:48,612 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:13:48,612 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:13:48,612 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:13:48,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-09-01 05:13:48,613 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:13:48,613 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:13:48,613 WARN L233 ceAbstractionStarter]: 27 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:13:48,614 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 28 thread instances. [2023-09-01 05:13:48,738 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:13:48,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1595 places, 1679 transitions, 4254 flow [2023-09-01 05:13:49,829 INFO L130 PetriNetUnfolder]: 169/2013 cut-off events. [2023-09-01 05:13:49,829 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-09-01 05:13:49,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2504 conditions, 2013 events. 169/2013 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 9608 event pairs, 0 based on Foata normal form. 0/1535 useless extension candidates. Maximal degree in co-relation 2390. Up to 58 conditions per place. [2023-09-01 05:13:49,935 INFO L82 GeneralOperation]: Start removeDead. Operand has 1595 places, 1679 transitions, 4254 flow [2023-09-01 05:13:49,963 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1595 places, 1679 transitions, 4254 flow [2023-09-01 05:13:49,963 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:13:49,963 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1595 places, 1679 transitions, 4254 flow [2023-09-01 05:13:49,963 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1595 places, 1679 transitions, 4254 flow [2023-09-01 05:13:49,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1595 places, 1679 transitions, 4254 flow [2023-09-01 05:13:51,078 INFO L130 PetriNetUnfolder]: 169/2013 cut-off events. [2023-09-01 05:13:51,079 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-09-01 05:13:51,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2504 conditions, 2013 events. 169/2013 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 9608 event pairs, 0 based on Foata normal form. 0/1535 useless extension candidates. Maximal degree in co-relation 2390. Up to 58 conditions per place. [2023-09-01 05:13:51,917 INFO L119 LiptonReduction]: Number of co-enabled transitions 2629256 [2023-09-01 05:14:06,447 INFO L134 LiptonReduction]: Checked pairs total: 9365131 [2023-09-01 05:14:06,447 INFO L136 LiptonReduction]: Total number of compositions: 1186 [2023-09-01 05:14:06,448 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:14:06,449 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:14:06,449 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:14:06,724 INFO L130 PetriNetUnfolder]: 62/946 cut-off events. [2023-09-01 05:14:06,724 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-09-01 05:14:06,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:14:06,724 INFO L208 CegarLoopForPetriNet]: trace histogram [29, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:14:06,724 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:14:06,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:14:06,725 INFO L85 PathProgramCache]: Analyzing trace with hash 898796465, now seen corresponding path program 1 times [2023-09-01 05:14:06,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:14:06,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152919921] [2023-09-01 05:14:06,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:14:06,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:14:06,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:14:06,768 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:14:06,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:14:06,837 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:14:06,837 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:14:06,837 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:14:06,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-09-01 05:14:06,838 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:14:06,838 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:14:06,838 WARN L233 ceAbstractionStarter]: 28 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:14:06,838 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 29 thread instances. [2023-09-01 05:14:06,987 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:14:06,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1651 places, 1738 transitions, 4433 flow [2023-09-01 05:14:08,269 INFO L130 PetriNetUnfolder]: 175/2084 cut-off events. [2023-09-01 05:14:08,269 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-09-01 05:14:08,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2607 conditions, 2084 events. 175/2084 cut-off events. For 4466/4466 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 9976 event pairs, 0 based on Foata normal form. 0/1589 useless extension candidates. Maximal degree in co-relation 2492. Up to 60 conditions per place. [2023-09-01 05:14:08,403 INFO L82 GeneralOperation]: Start removeDead. Operand has 1651 places, 1738 transitions, 4433 flow [2023-09-01 05:14:08,439 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1651 places, 1738 transitions, 4433 flow [2023-09-01 05:14:08,439 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:14:08,439 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1651 places, 1738 transitions, 4433 flow [2023-09-01 05:14:08,439 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1651 places, 1738 transitions, 4433 flow [2023-09-01 05:14:08,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1651 places, 1738 transitions, 4433 flow [2023-09-01 05:14:09,665 INFO L130 PetriNetUnfolder]: 175/2084 cut-off events. [2023-09-01 05:14:09,665 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-09-01 05:14:09,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2607 conditions, 2084 events. 175/2084 cut-off events. For 4466/4466 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 9976 event pairs, 0 based on Foata normal form. 0/1589 useless extension candidates. Maximal degree in co-relation 2492. Up to 60 conditions per place. [2023-09-01 05:14:10,494 INFO L119 LiptonReduction]: Number of co-enabled transitions 2822396 [2023-09-01 05:14:25,913 INFO L134 LiptonReduction]: Checked pairs total: 9968631 [2023-09-01 05:14:25,913 INFO L136 LiptonReduction]: Total number of compositions: 1228 [2023-09-01 05:14:25,915 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:14:25,916 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:14:25,916 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:14:26,304 INFO L130 PetriNetUnfolder]: 64/980 cut-off events. [2023-09-01 05:14:26,304 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-09-01 05:14:26,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:14:26,304 INFO L208 CegarLoopForPetriNet]: trace histogram [30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:14:26,304 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:14:26,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:14:26,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1409081928, now seen corresponding path program 1 times [2023-09-01 05:14:26,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:14:26,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759769728] [2023-09-01 05:14:26,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:14:26,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:14:26,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:14:26,354 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:14:26,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:14:26,411 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:14:26,411 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:14:26,412 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:14:26,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-09-01 05:14:26,412 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:14:26,413 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:14:26,413 WARN L233 ceAbstractionStarter]: 29 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:14:26,413 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 30 thread instances. [2023-09-01 05:14:26,609 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:14:26,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1707 places, 1797 transitions, 4614 flow [2023-09-01 05:14:28,198 INFO L130 PetriNetUnfolder]: 181/2155 cut-off events. [2023-09-01 05:14:28,198 INFO L131 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2023-09-01 05:14:28,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2711 conditions, 2155 events. 181/2155 cut-off events. For 4930/4930 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 10314 event pairs, 0 based on Foata normal form. 0/1643 useless extension candidates. Maximal degree in co-relation 2595. Up to 62 conditions per place. [2023-09-01 05:14:28,295 INFO L82 GeneralOperation]: Start removeDead. Operand has 1707 places, 1797 transitions, 4614 flow [2023-09-01 05:14:28,318 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1707 places, 1797 transitions, 4614 flow [2023-09-01 05:14:28,319 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:14:28,319 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1707 places, 1797 transitions, 4614 flow [2023-09-01 05:14:28,319 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1707 places, 1797 transitions, 4614 flow [2023-09-01 05:14:28,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1707 places, 1797 transitions, 4614 flow [2023-09-01 05:14:29,652 INFO L130 PetriNetUnfolder]: 181/2155 cut-off events. [2023-09-01 05:14:29,653 INFO L131 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2023-09-01 05:14:29,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2711 conditions, 2155 events. 181/2155 cut-off events. For 4930/4930 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 10314 event pairs, 0 based on Foata normal form. 0/1643 useless extension candidates. Maximal degree in co-relation 2595. Up to 62 conditions per place. [2023-09-01 05:14:30,484 INFO L119 LiptonReduction]: Number of co-enabled transitions 3022380 [2023-09-01 05:14:46,893 INFO L134 LiptonReduction]: Checked pairs total: 10747801 [2023-09-01 05:14:46,893 INFO L136 LiptonReduction]: Total number of compositions: 1249 [2023-09-01 05:14:46,895 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:14:46,895 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:14:46,895 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:14:47,306 INFO L130 PetriNetUnfolder]: 66/1012 cut-off events. [2023-09-01 05:14:47,306 INFO L131 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2023-09-01 05:14:47,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:14:47,306 INFO L208 CegarLoopForPetriNet]: trace histogram [31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:14:47,306 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:14:47,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:14:47,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1557879849, now seen corresponding path program 1 times [2023-09-01 05:14:47,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:14:47,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835538591] [2023-09-01 05:14:47,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:14:47,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:14:47,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:14:47,353 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:14:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:14:47,405 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:14:47,406 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:14:47,406 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:14:47,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-09-01 05:14:47,406 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:14:47,407 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:14:47,407 WARN L233 ceAbstractionStarter]: 30 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:14:47,407 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 31 thread instances. [2023-09-01 05:14:47,551 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:14:47,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1763 places, 1856 transitions, 4797 flow [2023-09-01 05:14:49,086 INFO L130 PetriNetUnfolder]: 187/2226 cut-off events. [2023-09-01 05:14:49,087 INFO L131 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2023-09-01 05:14:49,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2816 conditions, 2226 events. 187/2226 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 10650 event pairs, 0 based on Foata normal form. 0/1697 useless extension candidates. Maximal degree in co-relation 2699. Up to 64 conditions per place. [2023-09-01 05:14:49,197 INFO L82 GeneralOperation]: Start removeDead. Operand has 1763 places, 1856 transitions, 4797 flow [2023-09-01 05:14:49,237 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1763 places, 1856 transitions, 4797 flow [2023-09-01 05:14:49,237 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:14:49,237 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1763 places, 1856 transitions, 4797 flow [2023-09-01 05:14:49,238 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1763 places, 1856 transitions, 4797 flow [2023-09-01 05:14:49,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1763 places, 1856 transitions, 4797 flow [2023-09-01 05:14:50,889 INFO L130 PetriNetUnfolder]: 187/2226 cut-off events. [2023-09-01 05:14:50,890 INFO L131 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2023-09-01 05:14:50,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2816 conditions, 2226 events. 187/2226 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 10650 event pairs, 0 based on Foata normal form. 0/1697 useless extension candidates. Maximal degree in co-relation 2699. Up to 64 conditions per place. [2023-09-01 05:14:51,494 INFO L119 LiptonReduction]: Number of co-enabled transitions 3229208 [2023-09-01 05:15:08,616 INFO L134 LiptonReduction]: Checked pairs total: 11421539 [2023-09-01 05:15:08,616 INFO L136 LiptonReduction]: Total number of compositions: 1306 [2023-09-01 05:15:08,618 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:15:08,618 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:15:08,618 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:15:08,973 INFO L130 PetriNetUnfolder]: 69/1049 cut-off events. [2023-09-01 05:15:08,974 INFO L131 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2023-09-01 05:15:08,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:15:08,974 INFO L208 CegarLoopForPetriNet]: trace histogram [32, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:15:08,974 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:15:08,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:15:08,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1987762922, now seen corresponding path program 1 times [2023-09-01 05:15:08,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:15:08,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342660123] [2023-09-01 05:15:08,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:15:08,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:15:09,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:15:09,028 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:15:09,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:15:09,079 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:15:09,079 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:15:09,079 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:15:09,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-09-01 05:15:09,080 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:15:09,080 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:15:09,080 WARN L233 ceAbstractionStarter]: 31 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:15:09,080 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 32 thread instances. [2023-09-01 05:15:09,247 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:15:09,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1819 places, 1915 transitions, 4982 flow [2023-09-01 05:15:10,963 INFO L130 PetriNetUnfolder]: 193/2297 cut-off events. [2023-09-01 05:15:10,963 INFO L131 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2023-09-01 05:15:11,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2922 conditions, 2297 events. 193/2297 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 11059 event pairs, 0 based on Foata normal form. 0/1751 useless extension candidates. Maximal degree in co-relation 2804. Up to 66 conditions per place. [2023-09-01 05:15:11,091 INFO L82 GeneralOperation]: Start removeDead. Operand has 1819 places, 1915 transitions, 4982 flow [2023-09-01 05:15:11,138 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1819 places, 1915 transitions, 4982 flow [2023-09-01 05:15:11,138 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:15:11,138 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1819 places, 1915 transitions, 4982 flow [2023-09-01 05:15:11,139 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1819 places, 1915 transitions, 4982 flow [2023-09-01 05:15:11,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1819 places, 1915 transitions, 4982 flow [2023-09-01 05:15:12,982 INFO L130 PetriNetUnfolder]: 193/2297 cut-off events. [2023-09-01 05:15:12,982 INFO L131 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2023-09-01 05:15:13,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2922 conditions, 2297 events. 193/2297 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 11059 event pairs, 0 based on Foata normal form. 0/1751 useless extension candidates. Maximal degree in co-relation 2804. Up to 66 conditions per place. [2023-09-01 05:15:13,808 INFO L119 LiptonReduction]: Number of co-enabled transitions 3442880 [2023-09-01 05:15:31,565 INFO L134 LiptonReduction]: Checked pairs total: 12276281 [2023-09-01 05:15:31,565 INFO L136 LiptonReduction]: Total number of compositions: 1335 [2023-09-01 05:15:31,567 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:15:31,567 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:15:31,567 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:15:31,898 INFO L130 PetriNetUnfolder]: 73/1087 cut-off events. [2023-09-01 05:15:31,898 INFO L131 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2023-09-01 05:15:31,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:15:31,898 INFO L208 CegarLoopForPetriNet]: trace histogram [33, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:15:31,898 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:15:31,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:15:31,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1083978809, now seen corresponding path program 1 times [2023-09-01 05:15:31,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:15:31,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086473094] [2023-09-01 05:15:31,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:15:31,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:15:31,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:15:31,944 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:15:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:15:31,995 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:15:31,996 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:15:31,996 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:15:31,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-09-01 05:15:31,996 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:15:31,997 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:15:31,997 WARN L233 ceAbstractionStarter]: 32 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:15:31,997 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 33 thread instances. [2023-09-01 05:15:32,141 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:15:32,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1875 places, 1974 transitions, 5169 flow [2023-09-01 05:15:34,033 INFO L130 PetriNetUnfolder]: 199/2368 cut-off events. [2023-09-01 05:15:34,033 INFO L131 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2023-09-01 05:15:34,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3029 conditions, 2368 events. 199/2368 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 11378 event pairs, 0 based on Foata normal form. 0/1805 useless extension candidates. Maximal degree in co-relation 2910. Up to 68 conditions per place. [2023-09-01 05:15:34,155 INFO L82 GeneralOperation]: Start removeDead. Operand has 1875 places, 1974 transitions, 5169 flow [2023-09-01 05:15:34,182 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1875 places, 1974 transitions, 5169 flow [2023-09-01 05:15:34,182 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:15:34,182 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1875 places, 1974 transitions, 5169 flow [2023-09-01 05:15:34,183 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1875 places, 1974 transitions, 5169 flow [2023-09-01 05:15:34,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1875 places, 1974 transitions, 5169 flow [2023-09-01 05:15:35,878 INFO L130 PetriNetUnfolder]: 199/2368 cut-off events. [2023-09-01 05:15:35,878 INFO L131 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2023-09-01 05:15:36,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3029 conditions, 2368 events. 199/2368 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 11378 event pairs, 0 based on Foata normal form. 0/1805 useless extension candidates. Maximal degree in co-relation 2910. Up to 68 conditions per place. [2023-09-01 05:15:36,734 INFO L119 LiptonReduction]: Number of co-enabled transitions 3663396 [2023-09-01 05:15:55,510 INFO L134 LiptonReduction]: Checked pairs total: 12983524 [2023-09-01 05:15:55,511 INFO L136 LiptonReduction]: Total number of compositions: 1396 [2023-09-01 05:15:55,513 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:15:55,513 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:15:55,513 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:15:55,954 INFO L130 PetriNetUnfolder]: 74/1119 cut-off events. [2023-09-01 05:15:55,954 INFO L131 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2023-09-01 05:15:55,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:15:55,955 INFO L208 CegarLoopForPetriNet]: trace histogram [34, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:15:55,955 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:15:55,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:15:55,955 INFO L85 PathProgramCache]: Analyzing trace with hash -2101930172, now seen corresponding path program 1 times [2023-09-01 05:15:55,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:15:55,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671533186] [2023-09-01 05:15:55,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:15:55,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:15:56,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:15:56,006 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:15:56,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:15:56,063 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:15:56,064 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:15:56,064 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:15:56,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-09-01 05:15:56,064 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:15:56,064 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:15:56,065 WARN L233 ceAbstractionStarter]: 33 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:15:56,065 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 34 thread instances. [2023-09-01 05:15:56,213 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:15:56,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1931 places, 2033 transitions, 5358 flow [2023-09-01 05:15:58,072 INFO L130 PetriNetUnfolder]: 205/2439 cut-off events. [2023-09-01 05:15:58,072 INFO L131 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2023-09-01 05:15:58,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3137 conditions, 2439 events. 205/2439 cut-off events. For 7106/7106 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 11793 event pairs, 0 based on Foata normal form. 0/1859 useless extension candidates. Maximal degree in co-relation 3017. Up to 70 conditions per place. [2023-09-01 05:15:58,200 INFO L82 GeneralOperation]: Start removeDead. Operand has 1931 places, 2033 transitions, 5358 flow [2023-09-01 05:15:58,229 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1931 places, 2033 transitions, 5358 flow [2023-09-01 05:15:58,230 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:15:58,230 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1931 places, 2033 transitions, 5358 flow [2023-09-01 05:15:58,230 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1931 places, 2033 transitions, 5358 flow [2023-09-01 05:15:58,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1931 places, 2033 transitions, 5358 flow [2023-09-01 05:16:00,030 INFO L130 PetriNetUnfolder]: 205/2439 cut-off events. [2023-09-01 05:16:00,030 INFO L131 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2023-09-01 05:16:00,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3137 conditions, 2439 events. 205/2439 cut-off events. For 7106/7106 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 11793 event pairs, 0 based on Foata normal form. 0/1859 useless extension candidates. Maximal degree in co-relation 3017. Up to 70 conditions per place. [2023-09-01 05:16:00,920 INFO L119 LiptonReduction]: Number of co-enabled transitions 3890756 [2023-09-01 05:16:19,681 INFO L134 LiptonReduction]: Checked pairs total: 13934836 [2023-09-01 05:16:19,682 INFO L136 LiptonReduction]: Total number of compositions: 1416 [2023-09-01 05:16:19,684 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:16:19,684 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:16:19,684 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:16:20,160 INFO L130 PetriNetUnfolder]: 81/1165 cut-off events. [2023-09-01 05:16:20,160 INFO L131 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2023-09-01 05:16:20,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:16:20,161 INFO L208 CegarLoopForPetriNet]: trace histogram [35, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:16:20,161 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:16:20,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:16:20,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1129259680, now seen corresponding path program 1 times [2023-09-01 05:16:20,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:16:20,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818336593] [2023-09-01 05:16:20,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:16:20,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:16:20,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:16:20,220 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:16:20,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:16:20,277 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:16:20,277 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:16:20,277 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:16:20,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-09-01 05:16:20,278 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:16:20,278 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:16:20,278 WARN L233 ceAbstractionStarter]: 34 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:16:20,278 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 35 thread instances. [2023-09-01 05:16:20,461 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:16:20,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1987 places, 2092 transitions, 5549 flow [2023-09-01 05:16:22,532 INFO L130 PetriNetUnfolder]: 211/2510 cut-off events. [2023-09-01 05:16:22,532 INFO L131 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2023-09-01 05:16:22,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3246 conditions, 2510 events. 211/2510 cut-off events. For 7735/7735 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 12073 event pairs, 0 based on Foata normal form. 0/1913 useless extension candidates. Maximal degree in co-relation 3125. Up to 72 conditions per place. [2023-09-01 05:16:22,673 INFO L82 GeneralOperation]: Start removeDead. Operand has 1987 places, 2092 transitions, 5549 flow [2023-09-01 05:16:22,704 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1987 places, 2092 transitions, 5549 flow [2023-09-01 05:16:22,704 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:16:22,704 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1987 places, 2092 transitions, 5549 flow [2023-09-01 05:16:22,705 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1987 places, 2092 transitions, 5549 flow [2023-09-01 05:16:22,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1987 places, 2092 transitions, 5549 flow [2023-09-01 05:16:24,676 INFO L130 PetriNetUnfolder]: 211/2510 cut-off events. [2023-09-01 05:16:24,677 INFO L131 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2023-09-01 05:16:24,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3246 conditions, 2510 events. 211/2510 cut-off events. For 7735/7735 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 12073 event pairs, 0 based on Foata normal form. 0/1913 useless extension candidates. Maximal degree in co-relation 3125. Up to 72 conditions per place. [2023-09-01 05:16:25,608 INFO L119 LiptonReduction]: Number of co-enabled transitions 4124960 [2023-09-01 05:16:45,571 INFO L134 LiptonReduction]: Checked pairs total: 14710056 [2023-09-01 05:16:45,571 INFO L136 LiptonReduction]: Total number of compositions: 1483 [2023-09-01 05:16:45,573 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:16:45,573 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:16:45,573 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:16:46,023 INFO L130 PetriNetUnfolder]: 77/1185 cut-off events. [2023-09-01 05:16:46,023 INFO L131 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2023-09-01 05:16:46,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:16:46,024 INFO L208 CegarLoopForPetriNet]: trace histogram [36, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:16:46,024 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:16:46,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:16:46,024 INFO L85 PathProgramCache]: Analyzing trace with hash -245503717, now seen corresponding path program 1 times [2023-09-01 05:16:46,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:16:46,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490492586] [2023-09-01 05:16:46,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:16:46,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:16:46,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:16:46,078 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:16:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:16:46,144 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:16:46,145 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:16:46,145 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:16:46,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-09-01 05:16:46,145 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:16:46,146 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:16:46,146 WARN L233 ceAbstractionStarter]: 35 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:16:46,146 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 36 thread instances. [2023-09-01 05:16:46,303 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:16:46,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2043 places, 2151 transitions, 5742 flow [2023-09-01 05:16:48,427 INFO L130 PetriNetUnfolder]: 217/2581 cut-off events. [2023-09-01 05:16:48,427 INFO L131 PetriNetUnfolder]: For 8400/8400 co-relation queries the response was YES. [2023-09-01 05:16:48,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3356 conditions, 2581 events. 217/2581 cut-off events. For 8400/8400 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 12392 event pairs, 0 based on Foata normal form. 0/1967 useless extension candidates. Maximal degree in co-relation 3234. Up to 74 conditions per place. [2023-09-01 05:16:48,579 INFO L82 GeneralOperation]: Start removeDead. Operand has 2043 places, 2151 transitions, 5742 flow [2023-09-01 05:16:48,614 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2043 places, 2151 transitions, 5742 flow [2023-09-01 05:16:48,615 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:16:48,615 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2043 places, 2151 transitions, 5742 flow [2023-09-01 05:16:48,615 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2043 places, 2151 transitions, 5742 flow [2023-09-01 05:16:48,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2043 places, 2151 transitions, 5742 flow [2023-09-01 05:16:50,781 INFO L130 PetriNetUnfolder]: 217/2581 cut-off events. [2023-09-01 05:16:50,781 INFO L131 PetriNetUnfolder]: For 8400/8400 co-relation queries the response was YES. [2023-09-01 05:16:50,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3356 conditions, 2581 events. 217/2581 cut-off events. For 8400/8400 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 12392 event pairs, 0 based on Foata normal form. 0/1967 useless extension candidates. Maximal degree in co-relation 3234. Up to 74 conditions per place. [2023-09-01 05:16:51,789 INFO L119 LiptonReduction]: Number of co-enabled transitions 4366008 [2023-09-01 05:17:13,708 INFO L134 LiptonReduction]: Checked pairs total: 15549344 [2023-09-01 05:17:13,708 INFO L136 LiptonReduction]: Total number of compositions: 1519 [2023-09-01 05:17:13,710 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:17:13,710 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:17:13,710 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:17:14,197 INFO L130 PetriNetUnfolder]: 81/1223 cut-off events. [2023-09-01 05:17:14,197 INFO L131 PetriNetUnfolder]: For 8400/8400 co-relation queries the response was YES. [2023-09-01 05:17:14,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:17:14,198 INFO L208 CegarLoopForPetriNet]: trace histogram [37, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:17:14,198 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:17:14,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:17:14,198 INFO L85 PathProgramCache]: Analyzing trace with hash -241849406, now seen corresponding path program 1 times [2023-09-01 05:17:14,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:17:14,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584475167] [2023-09-01 05:17:14,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:17:14,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:17:14,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:17:14,247 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:17:14,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:17:14,313 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:17:14,313 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:17:14,314 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:17:14,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-09-01 05:17:14,314 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:17:14,314 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:17:14,314 WARN L233 ceAbstractionStarter]: 36 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:17:14,315 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 37 thread instances. [2023-09-01 05:17:14,497 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:17:14,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2099 places, 2210 transitions, 5937 flow [2023-09-01 05:17:16,756 INFO L130 PetriNetUnfolder]: 223/2652 cut-off events. [2023-09-01 05:17:16,757 INFO L131 PetriNetUnfolder]: For 9102/9102 co-relation queries the response was YES. [2023-09-01 05:17:16,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3467 conditions, 2652 events. 223/2652 cut-off events. For 9102/9102 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 12791 event pairs, 0 based on Foata normal form. 0/2021 useless extension candidates. Maximal degree in co-relation 3344. Up to 76 conditions per place. [2023-09-01 05:17:16,920 INFO L82 GeneralOperation]: Start removeDead. Operand has 2099 places, 2210 transitions, 5937 flow [2023-09-01 05:17:16,956 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2099 places, 2210 transitions, 5937 flow [2023-09-01 05:17:16,957 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:17:16,957 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2099 places, 2210 transitions, 5937 flow [2023-09-01 05:17:16,957 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2099 places, 2210 transitions, 5937 flow [2023-09-01 05:17:16,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2099 places, 2210 transitions, 5937 flow [2023-09-01 05:17:19,168 INFO L130 PetriNetUnfolder]: 223/2652 cut-off events. [2023-09-01 05:17:19,169 INFO L131 PetriNetUnfolder]: For 9102/9102 co-relation queries the response was YES. [2023-09-01 05:17:19,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3467 conditions, 2652 events. 223/2652 cut-off events. For 9102/9102 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 12791 event pairs, 0 based on Foata normal form. 0/2021 useless extension candidates. Maximal degree in co-relation 3344. Up to 76 conditions per place. [2023-09-01 05:17:20,210 INFO L119 LiptonReduction]: Number of co-enabled transitions 4613900 [2023-09-01 05:17:41,781 INFO L134 LiptonReduction]: Checked pairs total: 16534008 [2023-09-01 05:17:41,781 INFO L136 LiptonReduction]: Total number of compositions: 1555 [2023-09-01 05:17:41,783 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:17:41,783 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:17:41,783 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:17:42,359 INFO L130 PetriNetUnfolder]: 88/1267 cut-off events. [2023-09-01 05:17:42,359 INFO L131 PetriNetUnfolder]: For 9102/9102 co-relation queries the response was YES. [2023-09-01 05:17:42,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:17:42,359 INFO L208 CegarLoopForPetriNet]: trace histogram [38, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:17:42,360 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:17:42,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:17:42,360 INFO L85 PathProgramCache]: Analyzing trace with hash 922327119, now seen corresponding path program 1 times [2023-09-01 05:17:42,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:17:42,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197581365] [2023-09-01 05:17:42,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:17:42,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:17:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:17:42,424 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:17:42,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:17:42,497 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:17:42,497 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:17:42,497 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:17:42,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-09-01 05:17:42,498 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:17:42,498 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:17:42,498 WARN L233 ceAbstractionStarter]: 37 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:17:42,498 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 38 thread instances. [2023-09-01 05:17:42,691 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:17:42,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2155 places, 2269 transitions, 6134 flow [2023-09-01 05:17:44,902 INFO L130 PetriNetUnfolder]: 229/2723 cut-off events. [2023-09-01 05:17:44,902 INFO L131 PetriNetUnfolder]: For 9842/9842 co-relation queries the response was YES. [2023-09-01 05:17:45,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3579 conditions, 2723 events. 229/2723 cut-off events. For 9842/9842 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 13140 event pairs, 0 based on Foata normal form. 0/2075 useless extension candidates. Maximal degree in co-relation 3455. Up to 78 conditions per place. [2023-09-01 05:17:45,080 INFO L82 GeneralOperation]: Start removeDead. Operand has 2155 places, 2269 transitions, 6134 flow [2023-09-01 05:17:45,120 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2155 places, 2269 transitions, 6134 flow [2023-09-01 05:17:45,120 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:17:45,120 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2155 places, 2269 transitions, 6134 flow [2023-09-01 05:17:45,121 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2155 places, 2269 transitions, 6134 flow [2023-09-01 05:17:45,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2155 places, 2269 transitions, 6134 flow [2023-09-01 05:17:47,431 INFO L130 PetriNetUnfolder]: 229/2723 cut-off events. [2023-09-01 05:17:47,431 INFO L131 PetriNetUnfolder]: For 9842/9842 co-relation queries the response was YES. [2023-09-01 05:17:47,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3579 conditions, 2723 events. 229/2723 cut-off events. For 9842/9842 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 13140 event pairs, 0 based on Foata normal form. 0/2075 useless extension candidates. Maximal degree in co-relation 3455. Up to 78 conditions per place. [2023-09-01 05:17:48,524 INFO L119 LiptonReduction]: Number of co-enabled transitions 4868636 [2023-09-01 05:18:11,108 INFO L134 LiptonReduction]: Checked pairs total: 17245067 [2023-09-01 05:18:11,109 INFO L136 LiptonReduction]: Total number of compositions: 1590 [2023-09-01 05:18:11,110 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:18:11,110 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:18:11,110 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:18:11,562 INFO L130 PetriNetUnfolder]: 84/1282 cut-off events. [2023-09-01 05:18:11,562 INFO L131 PetriNetUnfolder]: For 9842/9842 co-relation queries the response was YES. [2023-09-01 05:18:11,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:18:11,562 INFO L208 CegarLoopForPetriNet]: trace histogram [39, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:18:11,562 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:18:11,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:18:11,563 INFO L85 PathProgramCache]: Analyzing trace with hash -565505767, now seen corresponding path program 1 times [2023-09-01 05:18:11,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:18:11,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934856939] [2023-09-01 05:18:11,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:18:11,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:18:11,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:18:11,619 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:18:11,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:18:11,693 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:18:11,693 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:18:11,693 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:18:11,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-09-01 05:18:11,694 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:18:11,694 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:18:11,694 WARN L233 ceAbstractionStarter]: 38 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:18:11,694 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 39 thread instances. [2023-09-01 05:18:11,922 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:18:11,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2211 places, 2328 transitions, 6333 flow [2023-09-01 05:18:14,376 INFO L130 PetriNetUnfolder]: 235/2794 cut-off events. [2023-09-01 05:18:14,376 INFO L131 PetriNetUnfolder]: For 10621/10621 co-relation queries the response was YES. [2023-09-01 05:18:14,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3692 conditions, 2794 events. 235/2794 cut-off events. For 10621/10621 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 13515 event pairs, 0 based on Foata normal form. 0/2129 useless extension candidates. Maximal degree in co-relation 3567. Up to 80 conditions per place. [2023-09-01 05:18:14,549 INFO L82 GeneralOperation]: Start removeDead. Operand has 2211 places, 2328 transitions, 6333 flow [2023-09-01 05:18:14,587 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2211 places, 2328 transitions, 6333 flow [2023-09-01 05:18:14,587 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:18:14,588 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2211 places, 2328 transitions, 6333 flow [2023-09-01 05:18:14,588 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2211 places, 2328 transitions, 6333 flow [2023-09-01 05:18:14,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2211 places, 2328 transitions, 6333 flow [2023-09-01 05:18:16,902 INFO L130 PetriNetUnfolder]: 235/2794 cut-off events. [2023-09-01 05:18:16,903 INFO L131 PetriNetUnfolder]: For 10621/10621 co-relation queries the response was YES. [2023-09-01 05:18:17,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3692 conditions, 2794 events. 235/2794 cut-off events. For 10621/10621 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 13515 event pairs, 0 based on Foata normal form. 0/2129 useless extension candidates. Maximal degree in co-relation 3567. Up to 80 conditions per place. [2023-09-01 05:18:18,035 INFO L119 LiptonReduction]: Number of co-enabled transitions 5130216 [2023-09-01 05:18:41,230 INFO L134 LiptonReduction]: Checked pairs total: 18159579 [2023-09-01 05:18:41,230 INFO L136 LiptonReduction]: Total number of compositions: 1634 [2023-09-01 05:18:41,232 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:18:41,232 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:18:41,233 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:18:41,868 INFO L130 PetriNetUnfolder]: 84/1319 cut-off events. [2023-09-01 05:18:41,868 INFO L131 PetriNetUnfolder]: For 10621/10621 co-relation queries the response was YES. [2023-09-01 05:18:41,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:18:41,868 INFO L208 CegarLoopForPetriNet]: trace histogram [40, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:18:41,868 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:18:41,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:18:41,869 INFO L85 PathProgramCache]: Analyzing trace with hash 3640659, now seen corresponding path program 1 times [2023-09-01 05:18:41,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:18:41,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033761953] [2023-09-01 05:18:41,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:18:41,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:18:41,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:18:41,937 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:18:41,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:18:42,011 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:18:42,011 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:18:42,011 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:18:42,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-09-01 05:18:42,012 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:18:42,012 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:18:42,012 WARN L233 ceAbstractionStarter]: 39 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:18:42,012 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 40 thread instances. [2023-09-01 05:18:42,209 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:18:42,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2267 places, 2387 transitions, 6534 flow [2023-09-01 05:18:44,770 INFO L130 PetriNetUnfolder]: 241/2865 cut-off events. [2023-09-01 05:18:44,770 INFO L131 PetriNetUnfolder]: For 11440/11440 co-relation queries the response was YES. [2023-09-01 05:18:44,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3806 conditions, 2865 events. 241/2865 cut-off events. For 11440/11440 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 13922 event pairs, 0 based on Foata normal form. 0/2183 useless extension candidates. Maximal degree in co-relation 3680. Up to 82 conditions per place. [2023-09-01 05:18:44,975 INFO L82 GeneralOperation]: Start removeDead. Operand has 2267 places, 2387 transitions, 6534 flow [2023-09-01 05:18:45,179 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2267 places, 2387 transitions, 6534 flow [2023-09-01 05:18:45,179 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:18:45,179 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2267 places, 2387 transitions, 6534 flow [2023-09-01 05:18:45,179 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2267 places, 2387 transitions, 6534 flow [2023-09-01 05:18:45,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2267 places, 2387 transitions, 6534 flow [2023-09-01 05:18:47,783 INFO L130 PetriNetUnfolder]: 241/2865 cut-off events. [2023-09-01 05:18:47,783 INFO L131 PetriNetUnfolder]: For 11440/11440 co-relation queries the response was YES. [2023-09-01 05:18:47,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3806 conditions, 2865 events. 241/2865 cut-off events. For 11440/11440 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 13922 event pairs, 0 based on Foata normal form. 0/2183 useless extension candidates. Maximal degree in co-relation 3680. Up to 82 conditions per place. [2023-09-01 05:18:49,042 INFO L119 LiptonReduction]: Number of co-enabled transitions 5398640 [2023-09-01 05:19:15,127 INFO L134 LiptonReduction]: Checked pairs total: 19083208 [2023-09-01 05:19:15,127 INFO L136 LiptonReduction]: Total number of compositions: 1670 [2023-09-01 05:19:15,129 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:19:15,129 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:19:15,129 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:19:15,737 INFO L130 PetriNetUnfolder]: 88/1350 cut-off events. [2023-09-01 05:19:15,737 INFO L131 PetriNetUnfolder]: For 11440/11440 co-relation queries the response was YES. [2023-09-01 05:19:15,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:19:15,737 INFO L208 CegarLoopForPetriNet]: trace histogram [41, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:19:15,738 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:19:15,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:19:15,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1668132111, now seen corresponding path program 1 times [2023-09-01 05:19:15,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:19:15,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031155280] [2023-09-01 05:19:15,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:19:15,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:19:15,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:19:15,814 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:19:15,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:19:15,891 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:19:15,891 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:19:15,891 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:19:15,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-09-01 05:19:15,892 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:19:15,892 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:19:15,892 WARN L233 ceAbstractionStarter]: 40 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:19:15,892 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 41 thread instances. [2023-09-01 05:19:16,104 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:19:16,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2323 places, 2446 transitions, 6737 flow [2023-09-01 05:19:19,017 INFO L130 PetriNetUnfolder]: 247/2936 cut-off events. [2023-09-01 05:19:19,017 INFO L131 PetriNetUnfolder]: For 12300/12300 co-relation queries the response was YES. [2023-09-01 05:19:19,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3921 conditions, 2936 events. 247/2936 cut-off events. For 12300/12300 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 14181 event pairs, 0 based on Foata normal form. 0/2237 useless extension candidates. Maximal degree in co-relation 3794. Up to 84 conditions per place. [2023-09-01 05:19:19,212 INFO L82 GeneralOperation]: Start removeDead. Operand has 2323 places, 2446 transitions, 6737 flow [2023-09-01 05:19:19,259 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2323 places, 2446 transitions, 6737 flow [2023-09-01 05:19:19,260 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:19:19,260 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2323 places, 2446 transitions, 6737 flow [2023-09-01 05:19:19,260 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2323 places, 2446 transitions, 6737 flow [2023-09-01 05:19:19,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2323 places, 2446 transitions, 6737 flow [2023-09-01 05:19:22,053 INFO L130 PetriNetUnfolder]: 247/2936 cut-off events. [2023-09-01 05:19:22,053 INFO L131 PetriNetUnfolder]: For 12300/12300 co-relation queries the response was YES. [2023-09-01 05:19:22,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3921 conditions, 2936 events. 247/2936 cut-off events. For 12300/12300 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 14181 event pairs, 0 based on Foata normal form. 0/2237 useless extension candidates. Maximal degree in co-relation 3794. Up to 84 conditions per place. [2023-09-01 05:19:23,385 INFO L119 LiptonReduction]: Number of co-enabled transitions 5673908 [2023-09-01 05:19:49,624 INFO L134 LiptonReduction]: Checked pairs total: 20193679 [2023-09-01 05:19:49,625 INFO L136 LiptonReduction]: Total number of compositions: 1730 [2023-09-01 05:19:49,626 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:19:49,626 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:19:49,627 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:19:50,271 INFO L130 PetriNetUnfolder]: 92/1396 cut-off events. [2023-09-01 05:19:50,271 INFO L131 PetriNetUnfolder]: For 12300/12300 co-relation queries the response was YES. [2023-09-01 05:19:50,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:19:50,271 INFO L208 CegarLoopForPetriNet]: trace histogram [42, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:19:50,271 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:19:50,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:19:50,271 INFO L85 PathProgramCache]: Analyzing trace with hash -444311374, now seen corresponding path program 1 times [2023-09-01 05:19:50,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:19:50,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314909297] [2023-09-01 05:19:50,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:19:50,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:19:50,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:19:50,341 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:19:50,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:19:50,427 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:19:50,427 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:19:50,427 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:19:50,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-09-01 05:19:50,428 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:19:50,428 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:19:50,428 WARN L233 ceAbstractionStarter]: 41 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:19:50,428 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 42 thread instances. [2023-09-01 05:19:50,639 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:19:50,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2379 places, 2505 transitions, 6942 flow [2023-09-01 05:19:53,700 INFO L130 PetriNetUnfolder]: 253/3007 cut-off events. [2023-09-01 05:19:53,700 INFO L131 PetriNetUnfolder]: For 13202/13202 co-relation queries the response was YES. [2023-09-01 05:19:53,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4037 conditions, 3007 events. 253/3007 cut-off events. For 13202/13202 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 14574 event pairs, 0 based on Foata normal form. 0/2291 useless extension candidates. Maximal degree in co-relation 3909. Up to 86 conditions per place. [2023-09-01 05:19:53,911 INFO L82 GeneralOperation]: Start removeDead. Operand has 2379 places, 2505 transitions, 6942 flow [2023-09-01 05:19:53,954 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2379 places, 2505 transitions, 6942 flow [2023-09-01 05:19:53,954 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:19:53,954 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2379 places, 2505 transitions, 6942 flow [2023-09-01 05:19:53,954 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2379 places, 2505 transitions, 6942 flow [2023-09-01 05:19:53,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2379 places, 2505 transitions, 6942 flow [2023-09-01 05:19:56,845 INFO L130 PetriNetUnfolder]: 253/3007 cut-off events. [2023-09-01 05:19:56,846 INFO L131 PetriNetUnfolder]: For 13202/13202 co-relation queries the response was YES. [2023-09-01 05:19:57,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4037 conditions, 3007 events. 253/3007 cut-off events. For 13202/13202 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 14574 event pairs, 0 based on Foata normal form. 0/2291 useless extension candidates. Maximal degree in co-relation 3909. Up to 86 conditions per place. [2023-09-01 05:19:58,266 INFO L119 LiptonReduction]: Number of co-enabled transitions 5956020 [2023-09-01 05:20:25,705 INFO L134 LiptonReduction]: Checked pairs total: 21181978 [2023-09-01 05:20:25,705 INFO L136 LiptonReduction]: Total number of compositions: 1769 [2023-09-01 05:20:25,707 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:20:25,707 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:20:25,707 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:20:26,402 INFO L130 PetriNetUnfolder]: 91/1424 cut-off events. [2023-09-01 05:20:26,402 INFO L131 PetriNetUnfolder]: For 13202/13202 co-relation queries the response was YES. [2023-09-01 05:20:26,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:20:26,403 INFO L208 CegarLoopForPetriNet]: trace histogram [43, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:20:26,403 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:20:26,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:20:26,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1580253677, now seen corresponding path program 1 times [2023-09-01 05:20:26,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:20:26,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997245029] [2023-09-01 05:20:26,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:20:26,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:20:26,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:20:26,482 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:20:26,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:20:26,584 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:20:26,585 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:20:26,585 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:20:26,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-09-01 05:20:26,585 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:20:26,586 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:20:26,586 WARN L233 ceAbstractionStarter]: 42 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:20:26,586 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 43 thread instances. [2023-09-01 05:20:26,785 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:20:26,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2435 places, 2564 transitions, 7149 flow [2023-09-01 05:20:29,849 INFO L130 PetriNetUnfolder]: 259/3078 cut-off events. [2023-09-01 05:20:29,849 INFO L131 PetriNetUnfolder]: For 14147/14147 co-relation queries the response was YES. [2023-09-01 05:20:30,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4154 conditions, 3078 events. 259/3078 cut-off events. For 14147/14147 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 15021 event pairs, 0 based on Foata normal form. 0/2345 useless extension candidates. Maximal degree in co-relation 4025. Up to 88 conditions per place. [2023-09-01 05:20:30,054 INFO L82 GeneralOperation]: Start removeDead. Operand has 2435 places, 2564 transitions, 7149 flow [2023-09-01 05:20:30,096 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2435 places, 2564 transitions, 7149 flow [2023-09-01 05:20:30,096 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:20:30,096 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2435 places, 2564 transitions, 7149 flow [2023-09-01 05:20:30,096 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2435 places, 2564 transitions, 7149 flow [2023-09-01 05:20:30,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2435 places, 2564 transitions, 7149 flow [2023-09-01 05:20:32,992 INFO L130 PetriNetUnfolder]: 259/3078 cut-off events. [2023-09-01 05:20:32,993 INFO L131 PetriNetUnfolder]: For 14147/14147 co-relation queries the response was YES. [2023-09-01 05:20:33,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4154 conditions, 3078 events. 259/3078 cut-off events. For 14147/14147 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 15021 event pairs, 0 based on Foata normal form. 0/2345 useless extension candidates. Maximal degree in co-relation 4025. Up to 88 conditions per place. [2023-09-01 05:20:34,456 INFO L119 LiptonReduction]: Number of co-enabled transitions 6244976 [2023-09-01 05:21:03,329 INFO L134 LiptonReduction]: Checked pairs total: 22383737 [2023-09-01 05:21:03,330 INFO L136 LiptonReduction]: Total number of compositions: 1797 [2023-09-01 05:21:03,331 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:21:03,332 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:21:03,332 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:21:03,933 INFO L130 PetriNetUnfolder]: 100/1471 cut-off events. [2023-09-01 05:21:03,934 INFO L131 PetriNetUnfolder]: For 14147/14147 co-relation queries the response was YES. [2023-09-01 05:21:03,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:21:03,934 INFO L208 CegarLoopForPetriNet]: trace histogram [44, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:21:03,934 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:21:03,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:21:03,935 INFO L85 PathProgramCache]: Analyzing trace with hash -477403658, now seen corresponding path program 1 times [2023-09-01 05:21:03,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:21:03,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087975563] [2023-09-01 05:21:03,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:21:03,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:21:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:21:04,002 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:21:04,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:21:04,141 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:21:04,141 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:21:04,141 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:21:04,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-09-01 05:21:04,141 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:21:04,142 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:21:04,142 WARN L233 ceAbstractionStarter]: 43 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:21:04,142 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 44 thread instances. [2023-09-01 05:21:04,355 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:21:04,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2491 places, 2623 transitions, 7358 flow [2023-09-01 05:21:07,499 INFO L130 PetriNetUnfolder]: 265/3149 cut-off events. [2023-09-01 05:21:07,500 INFO L131 PetriNetUnfolder]: For 15136/15136 co-relation queries the response was YES. [2023-09-01 05:21:07,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4272 conditions, 3149 events. 265/3149 cut-off events. For 15136/15136 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 15273 event pairs, 0 based on Foata normal form. 0/2399 useless extension candidates. Maximal degree in co-relation 4142. Up to 90 conditions per place. [2023-09-01 05:21:07,732 INFO L82 GeneralOperation]: Start removeDead. Operand has 2491 places, 2623 transitions, 7358 flow [2023-09-01 05:21:07,784 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2491 places, 2623 transitions, 7358 flow [2023-09-01 05:21:07,784 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:21:07,784 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2491 places, 2623 transitions, 7358 flow [2023-09-01 05:21:07,784 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2491 places, 2623 transitions, 7358 flow [2023-09-01 05:21:07,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2491 places, 2623 transitions, 7358 flow [2023-09-01 05:21:11,154 INFO L130 PetriNetUnfolder]: 265/3149 cut-off events. [2023-09-01 05:21:11,154 INFO L131 PetriNetUnfolder]: For 15136/15136 co-relation queries the response was YES. [2023-09-01 05:21:11,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4272 conditions, 3149 events. 265/3149 cut-off events. For 15136/15136 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 15273 event pairs, 0 based on Foata normal form. 0/2399 useless extension candidates. Maximal degree in co-relation 4142. Up to 90 conditions per place. [2023-09-01 05:21:12,662 INFO L119 LiptonReduction]: Number of co-enabled transitions 6540776 [2023-09-01 05:21:41,624 INFO L134 LiptonReduction]: Checked pairs total: 23264251 [2023-09-01 05:21:41,624 INFO L136 LiptonReduction]: Total number of compositions: 1856 [2023-09-01 05:21:41,626 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:21:41,626 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;@71e1a8ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:21:41,626 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:21:42,327 INFO L130 PetriNetUnfolder]: 97/1494 cut-off events. [2023-09-01 05:21:42,328 INFO L131 PetriNetUnfolder]: For 15136/15136 co-relation queries the response was YES. [2023-09-01 05:21:42,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:21:42,328 INFO L208 CegarLoopForPetriNet]: trace histogram [45, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:21:42,328 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:21:42,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:21:42,328 INFO L85 PathProgramCache]: Analyzing trace with hash -128953990, now seen corresponding path program 1 times [2023-09-01 05:21:42,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:21:42,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821427514] [2023-09-01 05:21:42,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:21:42,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:21:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:21:42,399 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:21:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:21:42,485 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:21:42,486 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:21:42,486 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:21:42,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-09-01 05:21:42,486 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:21:42,487 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:21:42,487 WARN L233 ceAbstractionStarter]: 44 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:21:42,487 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 45 thread instances. [2023-09-01 05:21:42,759 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:21:42,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2547 places, 2682 transitions, 7569 flow [2023-09-01 05:21:46,112 INFO L130 PetriNetUnfolder]: 271/3220 cut-off events. [2023-09-01 05:21:46,113 INFO L131 PetriNetUnfolder]: For 16170/16170 co-relation queries the response was YES. [2023-09-01 05:21:46,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4391 conditions, 3220 events. 271/3220 cut-off events. For 16170/16170 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 15614 event pairs, 0 based on Foata normal form. 0/2453 useless extension candidates. Maximal degree in co-relation 4260. Up to 92 conditions per place. [2023-09-01 05:21:46,356 INFO L82 GeneralOperation]: Start removeDead. Operand has 2547 places, 2682 transitions, 7569 flow [2023-09-01 05:21:46,410 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2547 places, 2682 transitions, 7569 flow [2023-09-01 05:21:46,410 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:21:46,410 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2547 places, 2682 transitions, 7569 flow [2023-09-01 05:21:46,411 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2547 places, 2682 transitions, 7569 flow [2023-09-01 05:21:46,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2547 places, 2682 transitions, 7569 flow [2023-09-01 05:21:50,001 INFO L130 PetriNetUnfolder]: 271/3220 cut-off events. [2023-09-01 05:21:50,001 INFO L131 PetriNetUnfolder]: For 16170/16170 co-relation queries the response was YES. [2023-09-01 05:21:50,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4391 conditions, 3220 events. 271/3220 cut-off events. For 16170/16170 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 15614 event pairs, 0 based on Foata normal form. 0/2453 useless extension candidates. Maximal degree in co-relation 4260. Up to 92 conditions per place. Killed by 15