./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread-ext/11_fmaxsymopt.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) 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/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/pthread-ext/11_fmaxsymopt.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 963498115a8eca6e92c68ab7fa8168826446f05b9b398350c3ee0745adf1bb45 --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 [2023-08-31 22:33:44,393 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 22:33:44,395 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 22:33:44,428 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 22:33:44,432 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 22:33:44,434 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 22:33:44,436 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 22:33:44,438 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 22:33:44,441 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 22:33:44,443 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 22:33:44,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 22:33:44,445 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 22:33:44,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 22:33:44,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 22:33:44,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 22:33:44,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 22:33:44,452 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 22:33:44,455 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 22:33:44,457 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 22:33:44,461 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 22:33:44,464 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 22:33:44,468 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 22:33:44,480 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 22:33:44,481 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 22:33:44,485 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 22:33:44,489 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 22:33:44,489 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 22:33:44,490 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 22:33:44,491 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 22:33:44,492 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 22:33:44,493 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 22:33:44,496 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 22:33:44,496 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 22:33:44,497 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 22:33:44,499 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 22:33:44,499 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 22:33:44,500 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 22:33:44,500 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 22:33:44,501 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 22:33:44,501 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 22:33:44,502 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 22:33:44,503 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-31 22:33:44,532 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 22:33:44,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 22:33:44,533 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 22:33:44,534 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 22:33:44,534 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 22:33:44,535 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 22:33:44,535 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 22:33:44,535 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 22:33:44,535 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 22:33:44,536 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 22:33:44,536 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 22:33:44,537 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 22:33:44,537 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 22:33:44,537 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 22:33:44,537 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 22:33:44,537 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-31 22:33:44,538 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-31 22:33:44,538 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-31 22:33:44,538 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 22:33:44,538 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-31 22:33:44,538 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 22:33:44,539 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 22:33:44,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 22:33:44,539 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 22:33:44,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 22:33:44,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:33:44,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 22:33:44,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 22:33:44,540 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 22:33:44,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 22:33:44,540 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 22:33:44,541 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 22:33:44,541 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 22:33:44,541 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 22:33:44,541 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 963498115a8eca6e92c68ab7fa8168826446f05b9b398350c3ee0745adf1bb45 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 22:33:44,881 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 22:33:44,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 22:33:44,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 22:33:44,902 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 22:33:44,902 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 22:33:44,903 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/11_fmaxsymopt.i [2023-08-31 22:33:46,047 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 22:33:46,356 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 22:33:46,357 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/11_fmaxsymopt.i [2023-08-31 22:33:46,373 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41677db65/ce3de9642ffd4eb1a1bea8462ad30f78/FLAG2e31dbe21 [2023-08-31 22:33:46,393 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41677db65/ce3de9642ffd4eb1a1bea8462ad30f78 [2023-08-31 22:33:46,396 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 22:33:46,397 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 22:33:46,399 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 22:33:46,399 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 22:33:46,402 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 22:33:46,403 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:33:46" (1/1) ... [2023-08-31 22:33:46,405 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@decdcda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:33:46, skipping insertion in model container [2023-08-31 22:33:46,405 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:33:46" (1/1) ... [2023-08-31 22:33:46,411 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 22:33:46,460 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 22:33:46,773 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/11_fmaxsymopt.i[30540,30553] [2023-08-31 22:33:46,784 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:33:46,794 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 22:33:46,827 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/11_fmaxsymopt.i[30540,30553] [2023-08-31 22:33:46,830 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:33:46,863 INFO L208 MainTranslator]: Completed translation [2023-08-31 22:33:46,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:33:46 WrapperNode [2023-08-31 22:33:46,863 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 22:33:46,864 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 22:33:46,864 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 22:33:46,865 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 22:33:46,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:33:46" (1/1) ... [2023-08-31 22:33:46,889 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:33:46" (1/1) ... [2023-08-31 22:33:46,911 INFO L138 Inliner]: procedures = 171, calls = 24, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 83 [2023-08-31 22:33:46,911 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 22:33:46,912 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 22:33:46,912 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 22:33:46,912 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 22:33:46,919 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:33:46" (1/1) ... [2023-08-31 22:33:46,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:33:46" (1/1) ... [2023-08-31 22:33:46,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:33:46" (1/1) ... [2023-08-31 22:33:46,922 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:33:46" (1/1) ... [2023-08-31 22:33:46,927 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:33:46" (1/1) ... [2023-08-31 22:33:46,930 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:33:46" (1/1) ... [2023-08-31 22:33:46,932 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:33:46" (1/1) ... [2023-08-31 22:33:46,933 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:33:46" (1/1) ... [2023-08-31 22:33:46,935 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 22:33:46,936 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 22:33:46,936 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 22:33:46,936 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 22:33:46,937 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:33:46" (1/1) ... [2023-08-31 22:33:46,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:33:46,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:33:46,966 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 22:33:46,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 22:33:47,033 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 22:33:47,033 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-31 22:33:47,034 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-31 22:33:47,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 22:33:47,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 22:33:47,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 22:33:47,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 22:33:47,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 22:33:47,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 22:33:47,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 22:33:47,048 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 22:33:47,154 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 22:33:47,156 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 22:33:47,384 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 22:33:47,411 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 22:33:47,413 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-31 22:33:47,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:33:47 BoogieIcfgContainer [2023-08-31 22:33:47,415 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 22:33:47,417 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 22:33:47,424 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 22:33:47,427 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 22:33:47,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 10:33:46" (1/3) ... [2023-08-31 22:33:47,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ce25bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:33:47, skipping insertion in model container [2023-08-31 22:33:47,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:33:46" (2/3) ... [2023-08-31 22:33:47,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ce25bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:33:47, skipping insertion in model container [2023-08-31 22:33:47,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:33:47" (3/3) ... [2023-08-31 22:33:47,434 INFO L112 eAbstractionObserver]: Analyzing ICFG 11_fmaxsymopt.i [2023-08-31 22:33:47,448 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 22:33:47,448 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-31 22:33:47,448 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 22:33:47,495 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:33:47,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 86 transitions, 177 flow [2023-08-31 22:33:47,562 INFO L130 PetriNetUnfolder]: 9/101 cut-off events. [2023-08-31 22:33:47,563 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:33:47,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 101 events. 9/101 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 137 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 63. Up to 4 conditions per place. [2023-08-31 22:33:47,568 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 86 transitions, 177 flow [2023-08-31 22:33:47,571 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 86 transitions, 177 flow [2023-08-31 22:33:47,574 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:33:47,584 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 81 places, 86 transitions, 177 flow [2023-08-31 22:33:47,588 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 81 places, 86 transitions, 177 flow [2023-08-31 22:33:47,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 86 transitions, 177 flow [2023-08-31 22:33:47,610 INFO L130 PetriNetUnfolder]: 9/101 cut-off events. [2023-08-31 22:33:47,611 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:33:47,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 101 events. 9/101 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 137 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 63. Up to 4 conditions per place. [2023-08-31 22:33:47,613 INFO L119 LiptonReduction]: Number of co-enabled transitions 1656 [2023-08-31 22:33:50,502 INFO L134 LiptonReduction]: Checked pairs total: 1674 [2023-08-31 22:33:50,503 INFO L136 LiptonReduction]: Total number of compositions: 94 [2023-08-31 22:33:50,514 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:33:50,519 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@67b84df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:33:50,520 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:33:50,524 INFO L130 PetriNetUnfolder]: 1/19 cut-off events. [2023-08-31 22:33:50,524 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:33:50,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:33:50,525 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-31 22:33:50,526 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:33:50,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:33:50,530 INFO L85 PathProgramCache]: Analyzing trace with hash -638216031, now seen corresponding path program 1 times [2023-08-31 22:33:50,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:33:50,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961688917] [2023-08-31 22:33:50,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:33:50,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:33:50,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:33:50,636 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:33:50,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:33:50,669 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:33:50,671 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:33:50,671 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:33:50,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 22:33:50,673 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:33:50,676 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:33:50,676 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:33:50,677 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-31 22:33:50,700 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:33:50,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 133 transitions, 278 flow [2023-08-31 22:33:50,728 INFO L130 PetriNetUnfolder]: 17/165 cut-off events. [2023-08-31 22:33:50,728 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 22:33:50,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 165 events. 17/165 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 364 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 109. Up to 6 conditions per place. [2023-08-31 22:33:50,731 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 133 transitions, 278 flow [2023-08-31 22:33:50,732 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 133 transitions, 278 flow [2023-08-31 22:33:50,732 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:33:50,732 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 123 places, 133 transitions, 278 flow [2023-08-31 22:33:50,733 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 123 places, 133 transitions, 278 flow [2023-08-31 22:33:50,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 133 transitions, 278 flow [2023-08-31 22:33:50,758 INFO L130 PetriNetUnfolder]: 17/165 cut-off events. [2023-08-31 22:33:50,761 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 22:33:50,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 165 events. 17/165 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 364 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 109. Up to 6 conditions per place. [2023-08-31 22:33:50,771 INFO L119 LiptonReduction]: Number of co-enabled transitions 7636 [2023-08-31 22:33:53,552 INFO L134 LiptonReduction]: Checked pairs total: 10505 [2023-08-31 22:33:53,552 INFO L136 LiptonReduction]: Total number of compositions: 124 [2023-08-31 22:33:53,554 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:33:53,555 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@67b84df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:33:53,556 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:33:53,570 INFO L130 PetriNetUnfolder]: 6/47 cut-off events. [2023-08-31 22:33:53,571 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 22:33:53,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:33:53,572 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-31 22:33:53,573 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:33:53,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:33:53,574 INFO L85 PathProgramCache]: Analyzing trace with hash -520649536, now seen corresponding path program 1 times [2023-08-31 22:33:53,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:33:53,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60426413] [2023-08-31 22:33:53,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:33:53,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:33:53,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:33:53,619 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:33:53,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:33:53,656 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:33:53,661 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:33:53,662 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:33:53,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 22:33:53,662 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:33:53,663 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:33:53,663 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:33:53,664 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-31 22:33:53,698 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:33:53,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 180 transitions, 381 flow [2023-08-31 22:33:53,766 INFO L130 PetriNetUnfolder]: 25/229 cut-off events. [2023-08-31 22:33:53,767 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 22:33:53,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 229 events. 25/229 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 643 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 169. Up to 8 conditions per place. [2023-08-31 22:33:53,769 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 180 transitions, 381 flow [2023-08-31 22:33:53,771 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 180 transitions, 381 flow [2023-08-31 22:33:53,772 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:33:53,772 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 165 places, 180 transitions, 381 flow [2023-08-31 22:33:53,773 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 165 places, 180 transitions, 381 flow [2023-08-31 22:33:53,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 180 transitions, 381 flow [2023-08-31 22:33:53,806 INFO L130 PetriNetUnfolder]: 25/229 cut-off events. [2023-08-31 22:33:53,806 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 22:33:53,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 229 events. 25/229 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 643 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 169. Up to 8 conditions per place. [2023-08-31 22:33:53,817 INFO L119 LiptonReduction]: Number of co-enabled transitions 17940 [2023-08-31 22:33:57,371 INFO L134 LiptonReduction]: Checked pairs total: 27983 [2023-08-31 22:33:57,371 INFO L136 LiptonReduction]: Total number of compositions: 178 [2023-08-31 22:33:57,373 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:33:57,374 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@67b84df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:33:57,374 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:33:57,384 INFO L130 PetriNetUnfolder]: 10/69 cut-off events. [2023-08-31 22:33:57,385 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 22:33:57,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:33:57,385 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-31 22:33:57,385 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:33:57,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:33:57,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1502236618, now seen corresponding path program 1 times [2023-08-31 22:33:57,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:33:57,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013152777] [2023-08-31 22:33:57,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:33:57,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:33:57,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:33:57,420 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:33:57,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:33:57,439 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:33:57,439 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:33:57,439 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:33:57,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 22:33:57,440 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:33:57,440 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:33:57,440 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:33:57,441 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-31 22:33:57,468 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:33:57,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 227 transitions, 486 flow [2023-08-31 22:33:57,504 INFO L130 PetriNetUnfolder]: 33/293 cut-off events. [2023-08-31 22:33:57,504 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 22:33:57,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 293 events. 33/293 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 931 event pairs, 0 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 237. Up to 10 conditions per place. [2023-08-31 22:33:57,507 INFO L82 GeneralOperation]: Start removeDead. Operand has 207 places, 227 transitions, 486 flow [2023-08-31 22:33:57,510 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 207 places, 227 transitions, 486 flow [2023-08-31 22:33:57,510 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:33:57,511 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 207 places, 227 transitions, 486 flow [2023-08-31 22:33:57,511 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 207 places, 227 transitions, 486 flow [2023-08-31 22:33:57,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 227 transitions, 486 flow [2023-08-31 22:33:57,548 INFO L130 PetriNetUnfolder]: 33/293 cut-off events. [2023-08-31 22:33:57,548 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 22:33:57,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 293 events. 33/293 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 931 event pairs, 0 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 237. Up to 10 conditions per place. [2023-08-31 22:33:57,588 INFO L119 LiptonReduction]: Number of co-enabled transitions 32568 [2023-08-31 22:34:01,491 INFO L134 LiptonReduction]: Checked pairs total: 50618 [2023-08-31 22:34:01,492 INFO L136 LiptonReduction]: Total number of compositions: 221 [2023-08-31 22:34:01,494 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:34:01,495 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@67b84df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:34:01,495 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:34:01,507 INFO L130 PetriNetUnfolder]: 14/91 cut-off events. [2023-08-31 22:34:01,507 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 22:34:01,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:34:01,508 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-31 22:34:01,508 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:34:01,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:34:01,508 INFO L85 PathProgramCache]: Analyzing trace with hash -627828657, now seen corresponding path program 1 times [2023-08-31 22:34:01,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:34:01,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804559867] [2023-08-31 22:34:01,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:34:01,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:34:01,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:34:01,546 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:34:01,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:34:01,574 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:34:01,576 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:34:01,577 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:34:01,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 22:34:01,577 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:34:01,578 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:34:01,578 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:34:01,578 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-31 22:34:01,613 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:34:01,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 249 places, 274 transitions, 593 flow [2023-08-31 22:34:01,665 INFO L130 PetriNetUnfolder]: 41/357 cut-off events. [2023-08-31 22:34:01,666 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 22:34:01,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 388 conditions, 357 events. 41/357 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1223 event pairs, 0 based on Foata normal form. 0/277 useless extension candidates. Maximal degree in co-relation 306. Up to 12 conditions per place. [2023-08-31 22:34:01,670 INFO L82 GeneralOperation]: Start removeDead. Operand has 249 places, 274 transitions, 593 flow [2023-08-31 22:34:01,674 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 249 places, 274 transitions, 593 flow [2023-08-31 22:34:01,674 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:34:01,674 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 249 places, 274 transitions, 593 flow [2023-08-31 22:34:01,674 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 249 places, 274 transitions, 593 flow [2023-08-31 22:34:01,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 249 places, 274 transitions, 593 flow [2023-08-31 22:34:01,742 INFO L130 PetriNetUnfolder]: 41/357 cut-off events. [2023-08-31 22:34:01,742 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 22:34:01,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 388 conditions, 357 events. 41/357 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1223 event pairs, 0 based on Foata normal form. 0/277 useless extension candidates. Maximal degree in co-relation 306. Up to 12 conditions per place. [2023-08-31 22:34:01,757 INFO L119 LiptonReduction]: Number of co-enabled transitions 51520 [2023-08-31 22:34:06,131 INFO L134 LiptonReduction]: Checked pairs total: 79980 [2023-08-31 22:34:06,132 INFO L136 LiptonReduction]: Total number of compositions: 260 [2023-08-31 22:34:06,133 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:34:06,133 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@67b84df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:34:06,133 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:34:06,145 INFO L130 PetriNetUnfolder]: 18/113 cut-off events. [2023-08-31 22:34:06,146 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 22:34:06,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:34:06,146 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:34:06,146 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:34:06,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:34:06,147 INFO L85 PathProgramCache]: Analyzing trace with hash -820750369, now seen corresponding path program 1 times [2023-08-31 22:34:06,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:34:06,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827573985] [2023-08-31 22:34:06,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:34:06,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:34:06,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:34:06,191 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:34:06,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:34:06,210 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:34:06,210 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:34:06,211 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:34:06,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 22:34:06,211 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:34:06,212 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:34:06,212 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:34:06,212 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-31 22:34:06,244 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:34:06,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 291 places, 321 transitions, 702 flow [2023-08-31 22:34:06,326 INFO L130 PetriNetUnfolder]: 49/421 cut-off events. [2023-08-31 22:34:06,326 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 22:34:06,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 461 conditions, 421 events. 49/421 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1498 event pairs, 0 based on Foata normal form. 0/326 useless extension candidates. Maximal degree in co-relation 376. Up to 14 conditions per place. [2023-08-31 22:34:06,332 INFO L82 GeneralOperation]: Start removeDead. Operand has 291 places, 321 transitions, 702 flow [2023-08-31 22:34:06,336 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 291 places, 321 transitions, 702 flow [2023-08-31 22:34:06,336 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:34:06,336 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 291 places, 321 transitions, 702 flow [2023-08-31 22:34:06,336 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 291 places, 321 transitions, 702 flow [2023-08-31 22:34:06,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 291 places, 321 transitions, 702 flow [2023-08-31 22:34:06,394 INFO L130 PetriNetUnfolder]: 49/421 cut-off events. [2023-08-31 22:34:06,394 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 22:34:06,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 461 conditions, 421 events. 49/421 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1498 event pairs, 0 based on Foata normal form. 0/326 useless extension candidates. Maximal degree in co-relation 376. Up to 14 conditions per place. [2023-08-31 22:34:06,419 INFO L119 LiptonReduction]: Number of co-enabled transitions 74796 [2023-08-31 22:34:11,622 INFO L134 LiptonReduction]: Checked pairs total: 116553 [2023-08-31 22:34:11,622 INFO L136 LiptonReduction]: Total number of compositions: 307 [2023-08-31 22:34:11,624 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:34:11,624 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@67b84df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:34:11,624 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:34:11,636 INFO L130 PetriNetUnfolder]: 22/135 cut-off events. [2023-08-31 22:34:11,636 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 22:34:11,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:34:11,636 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:34:11,636 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:34:11,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:34:11,637 INFO L85 PathProgramCache]: Analyzing trace with hash 924910841, now seen corresponding path program 1 times [2023-08-31 22:34:11,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:34:11,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138558693] [2023-08-31 22:34:11,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:34:11,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:34:11,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:34:11,676 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:34:11,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:34:11,704 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:34:11,709 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:34:11,709 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:34:11,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 22:34:11,710 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:34:11,710 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:34:11,713 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:34:11,713 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-31 22:34:11,749 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:34:11,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 333 places, 368 transitions, 813 flow [2023-08-31 22:34:11,860 INFO L130 PetriNetUnfolder]: 57/485 cut-off events. [2023-08-31 22:34:11,861 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 22:34:11,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535 conditions, 485 events. 57/485 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1809 event pairs, 0 based on Foata normal form. 0/375 useless extension candidates. Maximal degree in co-relation 447. Up to 16 conditions per place. [2023-08-31 22:34:11,866 INFO L82 GeneralOperation]: Start removeDead. Operand has 333 places, 368 transitions, 813 flow [2023-08-31 22:34:11,871 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 333 places, 368 transitions, 813 flow [2023-08-31 22:34:11,871 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:34:11,871 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 333 places, 368 transitions, 813 flow [2023-08-31 22:34:11,871 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 333 places, 368 transitions, 813 flow [2023-08-31 22:34:11,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 333 places, 368 transitions, 813 flow [2023-08-31 22:34:11,942 INFO L130 PetriNetUnfolder]: 57/485 cut-off events. [2023-08-31 22:34:11,943 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 22:34:11,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535 conditions, 485 events. 57/485 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1809 event pairs, 0 based on Foata normal form. 0/375 useless extension candidates. Maximal degree in co-relation 447. Up to 16 conditions per place. [2023-08-31 22:34:11,978 INFO L119 LiptonReduction]: Number of co-enabled transitions 102396 [2023-08-31 22:34:17,707 INFO L134 LiptonReduction]: Checked pairs total: 159088 [2023-08-31 22:34:17,707 INFO L136 LiptonReduction]: Total number of compositions: 354 [2023-08-31 22:34:17,708 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:34:17,709 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@67b84df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:34:17,709 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:34:17,721 INFO L130 PetriNetUnfolder]: 26/157 cut-off events. [2023-08-31 22:34:17,721 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 22:34:17,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:34:17,722 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:34:17,722 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:34:17,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:34:17,722 INFO L85 PathProgramCache]: Analyzing trace with hash 541035450, now seen corresponding path program 1 times [2023-08-31 22:34:17,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:34:17,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052960129] [2023-08-31 22:34:17,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:34:17,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:34:17,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:34:17,744 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:34:17,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:34:17,760 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:34:17,761 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:34:17,761 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:34:17,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 22:34:17,761 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:34:17,762 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:34:17,762 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:34:17,762 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-31 22:34:17,818 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:34:17,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 375 places, 415 transitions, 926 flow [2023-08-31 22:34:17,919 INFO L130 PetriNetUnfolder]: 65/549 cut-off events. [2023-08-31 22:34:17,919 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 22:34:17,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 610 conditions, 549 events. 65/549 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2092 event pairs, 0 based on Foata normal form. 0/424 useless extension candidates. Maximal degree in co-relation 519. Up to 18 conditions per place. [2023-08-31 22:34:17,929 INFO L82 GeneralOperation]: Start removeDead. Operand has 375 places, 415 transitions, 926 flow [2023-08-31 22:34:17,938 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 375 places, 415 transitions, 926 flow [2023-08-31 22:34:17,939 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:34:17,939 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 375 places, 415 transitions, 926 flow [2023-08-31 22:34:17,939 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 375 places, 415 transitions, 926 flow [2023-08-31 22:34:17,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 375 places, 415 transitions, 926 flow [2023-08-31 22:34:18,032 INFO L130 PetriNetUnfolder]: 65/549 cut-off events. [2023-08-31 22:34:18,032 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 22:34:18,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 610 conditions, 549 events. 65/549 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2092 event pairs, 0 based on Foata normal form. 0/424 useless extension candidates. Maximal degree in co-relation 519. Up to 18 conditions per place. [2023-08-31 22:34:18,107 INFO L119 LiptonReduction]: Number of co-enabled transitions 134320 [2023-08-31 22:34:24,758 INFO L134 LiptonReduction]: Checked pairs total: 211200 [2023-08-31 22:34:24,758 INFO L136 LiptonReduction]: Total number of compositions: 401 [2023-08-31 22:34:24,759 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:34:24,760 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@67b84df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:34:24,760 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:34:24,776 INFO L130 PetriNetUnfolder]: 30/179 cut-off events. [2023-08-31 22:34:24,776 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 22:34:24,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:34:24,777 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:34:24,777 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:34:24,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:34:24,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1645299778, now seen corresponding path program 1 times [2023-08-31 22:34:24,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:34:24,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65630821] [2023-08-31 22:34:24,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:34:24,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:34:24,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:34:24,797 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:34:24,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:34:24,814 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:34:24,815 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:34:24,815 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:34:24,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 22:34:24,815 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:34:24,816 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:34:24,816 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:34:24,816 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-31 22:34:24,857 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:34:24,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 417 places, 462 transitions, 1041 flow [2023-08-31 22:34:25,003 INFO L130 PetriNetUnfolder]: 73/613 cut-off events. [2023-08-31 22:34:25,004 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 22:34:25,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 686 conditions, 613 events. 73/613 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2368 event pairs, 0 based on Foata normal form. 0/473 useless extension candidates. Maximal degree in co-relation 592. Up to 20 conditions per place. [2023-08-31 22:34:25,015 INFO L82 GeneralOperation]: Start removeDead. Operand has 417 places, 462 transitions, 1041 flow [2023-08-31 22:34:25,021 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 417 places, 462 transitions, 1041 flow [2023-08-31 22:34:25,021 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:34:25,021 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 417 places, 462 transitions, 1041 flow [2023-08-31 22:34:25,021 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 417 places, 462 transitions, 1041 flow [2023-08-31 22:34:25,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 417 places, 462 transitions, 1041 flow [2023-08-31 22:34:25,138 INFO L130 PetriNetUnfolder]: 73/613 cut-off events. [2023-08-31 22:34:25,138 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 22:34:25,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 686 conditions, 613 events. 73/613 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2368 event pairs, 0 based on Foata normal form. 0/473 useless extension candidates. Maximal degree in co-relation 592. Up to 20 conditions per place. [2023-08-31 22:34:25,194 INFO L119 LiptonReduction]: Number of co-enabled transitions 170568 [2023-08-31 22:34:32,041 INFO L134 LiptonReduction]: Checked pairs total: 274813 [2023-08-31 22:34:32,042 INFO L136 LiptonReduction]: Total number of compositions: 439 [2023-08-31 22:34:32,043 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:34:32,044 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@67b84df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:34:32,044 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:34:32,061 INFO L130 PetriNetUnfolder]: 34/201 cut-off events. [2023-08-31 22:34:32,061 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 22:34:32,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:34:32,061 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:34:32,061 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:34:32,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:34:32,062 INFO L85 PathProgramCache]: Analyzing trace with hash -2056215162, now seen corresponding path program 1 times [2023-08-31 22:34:32,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:34:32,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299207223] [2023-08-31 22:34:32,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:34:32,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:34:32,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:34:32,096 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:34:32,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:34:32,124 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:34:32,125 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:34:32,125 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:34:32,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 22:34:32,125 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:34:32,129 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:34:32,129 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:34:32,129 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-31 22:34:32,174 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:34:32,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 459 places, 509 transitions, 1158 flow [2023-08-31 22:34:32,303 INFO L130 PetriNetUnfolder]: 81/677 cut-off events. [2023-08-31 22:34:32,304 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 22:34:32,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 763 conditions, 677 events. 81/677 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2648 event pairs, 0 based on Foata normal form. 0/522 useless extension candidates. Maximal degree in co-relation 667. Up to 22 conditions per place. [2023-08-31 22:34:32,317 INFO L82 GeneralOperation]: Start removeDead. Operand has 459 places, 509 transitions, 1158 flow [2023-08-31 22:34:32,325 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 459 places, 509 transitions, 1158 flow [2023-08-31 22:34:32,326 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:34:32,326 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 459 places, 509 transitions, 1158 flow [2023-08-31 22:34:32,326 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 459 places, 509 transitions, 1158 flow [2023-08-31 22:34:32,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 459 places, 509 transitions, 1158 flow [2023-08-31 22:34:32,481 INFO L130 PetriNetUnfolder]: 81/677 cut-off events. [2023-08-31 22:34:32,481 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 22:34:32,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 763 conditions, 677 events. 81/677 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2648 event pairs, 0 based on Foata normal form. 0/522 useless extension candidates. Maximal degree in co-relation 667. Up to 22 conditions per place. [2023-08-31 22:34:32,528 INFO L119 LiptonReduction]: Number of co-enabled transitions 211140 [2023-08-31 22:34:40,225 INFO L134 LiptonReduction]: Checked pairs total: 342910 [2023-08-31 22:34:40,226 INFO L136 LiptonReduction]: Total number of compositions: 485 [2023-08-31 22:34:40,227 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:34:40,227 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@67b84df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:34:40,227 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:34:40,263 INFO L130 PetriNetUnfolder]: 38/223 cut-off events. [2023-08-31 22:34:40,264 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 22:34:40,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:34:40,264 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:34:40,264 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:34:40,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:34:40,265 INFO L85 PathProgramCache]: Analyzing trace with hash -677885831, now seen corresponding path program 1 times [2023-08-31 22:34:40,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:34:40,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401074509] [2023-08-31 22:34:40,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:34:40,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:34:40,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:34:40,287 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:34:40,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:34:40,307 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:34:40,307 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:34:40,307 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:34:40,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 22:34:40,308 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:34:40,308 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:34:40,308 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:34:40,309 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-08-31 22:34:40,375 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:34:40,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 501 places, 556 transitions, 1277 flow [2023-08-31 22:34:40,515 INFO L130 PetriNetUnfolder]: 89/741 cut-off events. [2023-08-31 22:34:40,515 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 22:34:40,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 841 conditions, 741 events. 89/741 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2925 event pairs, 0 based on Foata normal form. 0/571 useless extension candidates. Maximal degree in co-relation 744. Up to 24 conditions per place. [2023-08-31 22:34:40,530 INFO L82 GeneralOperation]: Start removeDead. Operand has 501 places, 556 transitions, 1277 flow [2023-08-31 22:34:40,540 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 501 places, 556 transitions, 1277 flow [2023-08-31 22:34:40,540 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:34:40,540 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 501 places, 556 transitions, 1277 flow [2023-08-31 22:34:40,540 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 501 places, 556 transitions, 1277 flow [2023-08-31 22:34:40,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 501 places, 556 transitions, 1277 flow [2023-08-31 22:34:40,731 INFO L130 PetriNetUnfolder]: 89/741 cut-off events. [2023-08-31 22:34:40,732 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 22:34:40,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 841 conditions, 741 events. 89/741 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2925 event pairs, 0 based on Foata normal form. 0/571 useless extension candidates. Maximal degree in co-relation 744. Up to 24 conditions per place. [2023-08-31 22:34:40,790 INFO L119 LiptonReduction]: Number of co-enabled transitions 256036 [2023-08-31 22:34:50,007 INFO L134 LiptonReduction]: Checked pairs total: 419950 [2023-08-31 22:34:50,008 INFO L136 LiptonReduction]: Total number of compositions: 532 [2023-08-31 22:34:50,009 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:34:50,009 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@67b84df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:34:50,009 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:34:50,045 INFO L130 PetriNetUnfolder]: 42/245 cut-off events. [2023-08-31 22:34:50,046 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 22:34:50,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:34:50,046 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:34:50,046 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:34:50,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:34:50,047 INFO L85 PathProgramCache]: Analyzing trace with hash -92780664, now seen corresponding path program 1 times [2023-08-31 22:34:50,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:34:50,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115617047] [2023-08-31 22:34:50,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:34:50,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:34:50,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:34:50,077 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:34:50,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:34:50,103 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:34:50,103 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:34:50,104 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:34:50,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 22:34:50,104 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:34:50,104 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:34:50,105 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:34:50,105 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-08-31 22:34:50,153 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:34:50,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 543 places, 603 transitions, 1398 flow [2023-08-31 22:34:50,355 INFO L130 PetriNetUnfolder]: 97/805 cut-off events. [2023-08-31 22:34:50,355 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 22:34:50,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 920 conditions, 805 events. 97/805 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 3213 event pairs, 0 based on Foata normal form. 0/620 useless extension candidates. Maximal degree in co-relation 822. Up to 26 conditions per place. [2023-08-31 22:34:50,379 INFO L82 GeneralOperation]: Start removeDead. Operand has 543 places, 603 transitions, 1398 flow [2023-08-31 22:34:50,390 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 543 places, 603 transitions, 1398 flow [2023-08-31 22:34:50,390 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:34:50,390 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 543 places, 603 transitions, 1398 flow [2023-08-31 22:34:50,391 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 543 places, 603 transitions, 1398 flow [2023-08-31 22:34:50,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 543 places, 603 transitions, 1398 flow [2023-08-31 22:34:50,632 INFO L130 PetriNetUnfolder]: 97/805 cut-off events. [2023-08-31 22:34:50,633 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 22:34:50,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 920 conditions, 805 events. 97/805 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 3213 event pairs, 0 based on Foata normal form. 0/620 useless extension candidates. Maximal degree in co-relation 822. Up to 26 conditions per place. [2023-08-31 22:34:50,694 INFO L119 LiptonReduction]: Number of co-enabled transitions 305256 [2023-08-31 22:35:00,074 INFO L134 LiptonReduction]: Checked pairs total: 493662 [2023-08-31 22:35:00,075 INFO L136 LiptonReduction]: Total number of compositions: 571 [2023-08-31 22:35:00,076 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:35:00,076 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@67b84df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:35:00,077 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:35:00,100 INFO L130 PetriNetUnfolder]: 46/267 cut-off events. [2023-08-31 22:35:00,100 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 22:35:00,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:35:00,100 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:35:00,100 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:35:00,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:35:00,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1698161340, now seen corresponding path program 1 times [2023-08-31 22:35:00,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:35:00,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754350817] [2023-08-31 22:35:00,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:35:00,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:35:00,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:35:00,121 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:35:00,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:35:00,141 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:35:00,141 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:35:00,141 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:35:00,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 22:35:00,142 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:35:00,142 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:35:00,143 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:35:00,143 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-08-31 22:35:00,198 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:35:00,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 585 places, 650 transitions, 1521 flow [2023-08-31 22:35:00,446 INFO L130 PetriNetUnfolder]: 105/869 cut-off events. [2023-08-31 22:35:00,446 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 22:35:00,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1000 conditions, 869 events. 105/869 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 3527 event pairs, 0 based on Foata normal form. 0/669 useless extension candidates. Maximal degree in co-relation 901. Up to 28 conditions per place. [2023-08-31 22:35:00,474 INFO L82 GeneralOperation]: Start removeDead. Operand has 585 places, 650 transitions, 1521 flow [2023-08-31 22:35:00,483 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 585 places, 650 transitions, 1521 flow [2023-08-31 22:35:00,483 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:35:00,483 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 585 places, 650 transitions, 1521 flow [2023-08-31 22:35:00,483 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 585 places, 650 transitions, 1521 flow [2023-08-31 22:35:00,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 585 places, 650 transitions, 1521 flow [2023-08-31 22:35:00,706 INFO L130 PetriNetUnfolder]: 105/869 cut-off events. [2023-08-31 22:35:00,707 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 22:35:00,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1000 conditions, 869 events. 105/869 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 3527 event pairs, 0 based on Foata normal form. 0/669 useless extension candidates. Maximal degree in co-relation 901. Up to 28 conditions per place. [2023-08-31 22:35:00,791 INFO L119 LiptonReduction]: Number of co-enabled transitions 358800 [2023-08-31 22:35:11,221 INFO L134 LiptonReduction]: Checked pairs total: 587598 [2023-08-31 22:35:11,221 INFO L136 LiptonReduction]: Total number of compositions: 631 [2023-08-31 22:35:11,223 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:35:11,223 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@67b84df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:35:11,223 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:35:11,257 INFO L130 PetriNetUnfolder]: 50/289 cut-off events. [2023-08-31 22:35:11,257 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 22:35:11,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:35:11,257 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:35:11,257 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:35:11,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:35:11,257 INFO L85 PathProgramCache]: Analyzing trace with hash 9984539, now seen corresponding path program 1 times [2023-08-31 22:35:11,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:35:11,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471640484] [2023-08-31 22:35:11,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:35:11,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:35:11,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:35:11,280 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:35:11,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:35:11,302 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:35:11,302 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:35:11,302 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:35:11,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-31 22:35:11,303 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:35:11,303 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:35:11,303 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:35:11,303 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-08-31 22:35:11,365 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:35:11,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 627 places, 697 transitions, 1646 flow [2023-08-31 22:35:11,671 INFO L130 PetriNetUnfolder]: 113/933 cut-off events. [2023-08-31 22:35:11,672 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 22:35:11,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1081 conditions, 933 events. 113/933 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 3799 event pairs, 0 based on Foata normal form. 0/718 useless extension candidates. Maximal degree in co-relation 981. Up to 30 conditions per place. [2023-08-31 22:35:11,689 INFO L82 GeneralOperation]: Start removeDead. Operand has 627 places, 697 transitions, 1646 flow [2023-08-31 22:35:11,697 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 627 places, 697 transitions, 1646 flow [2023-08-31 22:35:11,697 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:35:11,697 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 627 places, 697 transitions, 1646 flow [2023-08-31 22:35:11,697 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 627 places, 697 transitions, 1646 flow [2023-08-31 22:35:11,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 627 places, 697 transitions, 1646 flow [2023-08-31 22:35:11,913 INFO L130 PetriNetUnfolder]: 113/933 cut-off events. [2023-08-31 22:35:11,914 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 22:35:11,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1081 conditions, 933 events. 113/933 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 3799 event pairs, 0 based on Foata normal form. 0/718 useless extension candidates. Maximal degree in co-relation 981. Up to 30 conditions per place. [2023-08-31 22:35:12,028 INFO L119 LiptonReduction]: Number of co-enabled transitions 416668 [2023-08-31 22:35:22,419 INFO L134 LiptonReduction]: Checked pairs total: 660901 [2023-08-31 22:35:22,420 INFO L136 LiptonReduction]: Total number of compositions: 647 [2023-08-31 22:35:22,421 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:35:22,421 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@67b84df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:35:22,421 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:35:22,456 INFO L130 PetriNetUnfolder]: 54/311 cut-off events. [2023-08-31 22:35:22,456 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 22:35:22,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:35:22,457 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:35:22,457 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:35:22,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:35:22,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1773427460, now seen corresponding path program 1 times [2023-08-31 22:35:22,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:35:22,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219629443] [2023-08-31 22:35:22,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:35:22,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:35:22,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:35:22,482 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:35:22,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:35:22,506 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:35:22,506 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:35:22,507 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:35:22,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-31 22:35:22,507 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:35:22,507 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:35:22,508 WARN L233 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:35:22,508 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2023-08-31 22:35:22,569 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:35:22,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 669 places, 744 transitions, 1773 flow [2023-08-31 22:35:22,886 INFO L130 PetriNetUnfolder]: 121/997 cut-off events. [2023-08-31 22:35:22,886 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 22:35:22,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1163 conditions, 997 events. 121/997 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 4072 event pairs, 0 based on Foata normal form. 0/767 useless extension candidates. Maximal degree in co-relation 1062. Up to 32 conditions per place. [2023-08-31 22:35:22,905 INFO L82 GeneralOperation]: Start removeDead. Operand has 669 places, 744 transitions, 1773 flow [2023-08-31 22:35:22,914 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 669 places, 744 transitions, 1773 flow [2023-08-31 22:35:22,914 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:35:22,914 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 669 places, 744 transitions, 1773 flow [2023-08-31 22:35:22,915 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 669 places, 744 transitions, 1773 flow [2023-08-31 22:35:22,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 669 places, 744 transitions, 1773 flow [2023-08-31 22:35:23,124 INFO L130 PetriNetUnfolder]: 121/997 cut-off events. [2023-08-31 22:35:23,124 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 22:35:23,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1163 conditions, 997 events. 121/997 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 4072 event pairs, 0 based on Foata normal form. 0/767 useless extension candidates. Maximal degree in co-relation 1062. Up to 32 conditions per place. [2023-08-31 22:35:23,238 INFO L119 LiptonReduction]: Number of co-enabled transitions 478860 [2023-08-31 22:35:34,780 INFO L134 LiptonReduction]: Checked pairs total: 770117 [2023-08-31 22:35:34,780 INFO L136 LiptonReduction]: Total number of compositions: 707 [2023-08-31 22:35:34,781 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:35:34,782 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@67b84df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:35:34,782 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:35:34,813 INFO L130 PetriNetUnfolder]: 58/333 cut-off events. [2023-08-31 22:35:34,813 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 22:35:34,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:35:34,813 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] [2023-08-31 22:35:34,813 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:35:34,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:35:34,813 INFO L85 PathProgramCache]: Analyzing trace with hash -2052530475, now seen corresponding path program 1 times [2023-08-31 22:35:34,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:35:34,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699927346] [2023-08-31 22:35:34,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:35:34,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:35:34,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:35:34,852 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:35:34,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:35:34,880 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:35:34,881 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:35:34,882 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:35:34,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-31 22:35:34,883 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:35:34,883 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:35:34,883 WARN L233 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:35:34,883 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2023-08-31 22:35:34,945 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:35:34,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 711 places, 791 transitions, 1902 flow [2023-08-31 22:35:35,217 INFO L130 PetriNetUnfolder]: 129/1061 cut-off events. [2023-08-31 22:35:35,218 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-08-31 22:35:35,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1246 conditions, 1061 events. 129/1061 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 4396 event pairs, 0 based on Foata normal form. 0/816 useless extension candidates. Maximal degree in co-relation 1144. Up to 34 conditions per place. [2023-08-31 22:35:35,248 INFO L82 GeneralOperation]: Start removeDead. Operand has 711 places, 791 transitions, 1902 flow [2023-08-31 22:35:35,262 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 711 places, 791 transitions, 1902 flow [2023-08-31 22:35:35,262 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:35:35,263 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 711 places, 791 transitions, 1902 flow [2023-08-31 22:35:35,263 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 711 places, 791 transitions, 1902 flow [2023-08-31 22:35:35,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 711 places, 791 transitions, 1902 flow [2023-08-31 22:35:35,523 INFO L130 PetriNetUnfolder]: 129/1061 cut-off events. [2023-08-31 22:35:35,523 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-08-31 22:35:35,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1246 conditions, 1061 events. 129/1061 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 4396 event pairs, 0 based on Foata normal form. 0/816 useless extension candidates. Maximal degree in co-relation 1144. Up to 34 conditions per place. [2023-08-31 22:35:35,649 INFO L119 LiptonReduction]: Number of co-enabled transitions 545376 [2023-08-31 22:35:48,115 INFO L134 LiptonReduction]: Checked pairs total: 875629 [2023-08-31 22:35:48,115 INFO L136 LiptonReduction]: Total number of compositions: 747 [2023-08-31 22:35:48,118 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:35:48,118 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@67b84df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:35:48,118 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:35:48,161 INFO L130 PetriNetUnfolder]: 62/355 cut-off events. [2023-08-31 22:35:48,161 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-08-31 22:35:48,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:35:48,162 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] [2023-08-31 22:35:48,162 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:35:48,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:35:48,163 INFO L85 PathProgramCache]: Analyzing trace with hash 878350839, now seen corresponding path program 1 times [2023-08-31 22:35:48,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:35:48,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411949866] [2023-08-31 22:35:48,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:35:48,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:35:48,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:35:48,186 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:35:48,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:35:48,214 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:35:48,214 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:35:48,214 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:35:48,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-31 22:35:48,215 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:35:48,215 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:35:48,215 WARN L233 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:35:48,215 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2023-08-31 22:35:48,320 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:35:48,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 753 places, 838 transitions, 2033 flow [2023-08-31 22:35:48,604 INFO L130 PetriNetUnfolder]: 137/1125 cut-off events. [2023-08-31 22:35:48,604 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-08-31 22:35:48,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1330 conditions, 1125 events. 137/1125 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 4674 event pairs, 0 based on Foata normal form. 0/865 useless extension candidates. Maximal degree in co-relation 1227. Up to 36 conditions per place. [2023-08-31 22:35:48,637 INFO L82 GeneralOperation]: Start removeDead. Operand has 753 places, 838 transitions, 2033 flow [2023-08-31 22:35:48,652 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 753 places, 838 transitions, 2033 flow [2023-08-31 22:35:48,652 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:35:48,653 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 753 places, 838 transitions, 2033 flow [2023-08-31 22:35:48,653 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 753 places, 838 transitions, 2033 flow [2023-08-31 22:35:48,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 753 places, 838 transitions, 2033 flow [2023-08-31 22:35:48,937 INFO L130 PetriNetUnfolder]: 137/1125 cut-off events. [2023-08-31 22:35:48,937 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-08-31 22:35:48,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1330 conditions, 1125 events. 137/1125 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 4674 event pairs, 0 based on Foata normal form. 0/865 useless extension candidates. Maximal degree in co-relation 1227. Up to 36 conditions per place. [2023-08-31 22:35:49,142 INFO L119 LiptonReduction]: Number of co-enabled transitions 616216 [2023-08-31 22:36:01,988 INFO L134 LiptonReduction]: Checked pairs total: 992362 [2023-08-31 22:36:01,989 INFO L136 LiptonReduction]: Total number of compositions: 792 [2023-08-31 22:36:01,993 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:36:01,993 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@67b84df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:36:01,993 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:36:02,032 INFO L130 PetriNetUnfolder]: 66/377 cut-off events. [2023-08-31 22:36:02,032 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-08-31 22:36:02,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:36:02,032 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] [2023-08-31 22:36:02,032 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:36:02,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:36:02,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1999480444, now seen corresponding path program 1 times [2023-08-31 22:36:02,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:36:02,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377468114] [2023-08-31 22:36:02,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:36:02,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:36:02,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:36:02,055 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:36:02,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:36:02,083 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:36:02,083 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:36:02,083 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:36:02,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-31 22:36:02,084 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:36:02,084 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:36:02,084 WARN L233 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:36:02,084 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2023-08-31 22:36:02,149 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:36:02,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 795 places, 885 transitions, 2166 flow [2023-08-31 22:36:02,466 INFO L130 PetriNetUnfolder]: 145/1189 cut-off events. [2023-08-31 22:36:02,467 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-08-31 22:36:02,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1415 conditions, 1189 events. 145/1189 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 4950 event pairs, 0 based on Foata normal form. 0/914 useless extension candidates. Maximal degree in co-relation 1311. Up to 38 conditions per place. [2023-08-31 22:36:02,505 INFO L82 GeneralOperation]: Start removeDead. Operand has 795 places, 885 transitions, 2166 flow [2023-08-31 22:36:02,522 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 795 places, 885 transitions, 2166 flow [2023-08-31 22:36:02,522 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:36:02,522 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 795 places, 885 transitions, 2166 flow [2023-08-31 22:36:02,522 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 795 places, 885 transitions, 2166 flow [2023-08-31 22:36:02,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 795 places, 885 transitions, 2166 flow [2023-08-31 22:36:02,844 INFO L130 PetriNetUnfolder]: 145/1189 cut-off events. [2023-08-31 22:36:02,844 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-08-31 22:36:02,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1415 conditions, 1189 events. 145/1189 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 4950 event pairs, 0 based on Foata normal form. 0/914 useless extension candidates. Maximal degree in co-relation 1311. Up to 38 conditions per place. [2023-08-31 22:36:03,013 INFO L119 LiptonReduction]: Number of co-enabled transitions 691380 [2023-08-31 22:36:16,533 INFO L134 LiptonReduction]: Checked pairs total: 1164517 [2023-08-31 22:36:16,533 INFO L136 LiptonReduction]: Total number of compositions: 837 [2023-08-31 22:36:16,534 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:36:16,534 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@67b84df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:36:16,534 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:36:16,575 INFO L130 PetriNetUnfolder]: 70/399 cut-off events. [2023-08-31 22:36:16,575 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-08-31 22:36:16,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:36:16,575 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] [2023-08-31 22:36:16,575 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:36:16,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:36:16,575 INFO L85 PathProgramCache]: Analyzing trace with hash 610186729, now seen corresponding path program 1 times [2023-08-31 22:36:16,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:36:16,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550090787] [2023-08-31 22:36:16,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:36:16,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:36:16,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:36:16,615 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:36:16,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:36:16,644 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:36:16,645 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:36:16,645 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:36:16,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-31 22:36:16,645 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:36:16,645 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:36:16,646 WARN L233 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:36:16,646 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2023-08-31 22:36:16,714 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:36:16,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 837 places, 932 transitions, 2301 flow [2023-08-31 22:36:17,154 INFO L130 PetriNetUnfolder]: 153/1253 cut-off events. [2023-08-31 22:36:17,154 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-08-31 22:36:17,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1501 conditions, 1253 events. 153/1253 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 5237 event pairs, 0 based on Foata normal form. 0/963 useless extension candidates. Maximal degree in co-relation 1396. Up to 40 conditions per place. [2023-08-31 22:36:17,183 INFO L82 GeneralOperation]: Start removeDead. Operand has 837 places, 932 transitions, 2301 flow [2023-08-31 22:36:17,195 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 837 places, 932 transitions, 2301 flow [2023-08-31 22:36:17,195 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:36:17,195 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 837 places, 932 transitions, 2301 flow [2023-08-31 22:36:17,195 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 837 places, 932 transitions, 2301 flow [2023-08-31 22:36:17,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 837 places, 932 transitions, 2301 flow [2023-08-31 22:36:17,541 INFO L130 PetriNetUnfolder]: 153/1253 cut-off events. [2023-08-31 22:36:17,541 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-08-31 22:36:17,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1501 conditions, 1253 events. 153/1253 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 5237 event pairs, 0 based on Foata normal form. 0/963 useless extension candidates. Maximal degree in co-relation 1396. Up to 40 conditions per place. [2023-08-31 22:36:17,740 INFO L119 LiptonReduction]: Number of co-enabled transitions 770868 [2023-08-31 22:36:31,931 INFO L134 LiptonReduction]: Checked pairs total: 1243685 [2023-08-31 22:36:31,931 INFO L136 LiptonReduction]: Total number of compositions: 884 [2023-08-31 22:36:31,933 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:36:31,933 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@67b84df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:36:31,933 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:36:31,976 INFO L130 PetriNetUnfolder]: 74/421 cut-off events. [2023-08-31 22:36:31,976 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-08-31 22:36:31,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:36:31,977 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] [2023-08-31 22:36:31,977 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:36:31,977 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:36:31,977 INFO L85 PathProgramCache]: Analyzing trace with hash -499753004, now seen corresponding path program 1 times [2023-08-31 22:36:31,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:36:31,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170390399] [2023-08-31 22:36:31,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:36:31,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:36:32,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:36:32,003 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:36:32,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:36:32,037 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:36:32,038 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:36:32,038 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:36:32,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-31 22:36:32,038 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:36:32,039 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:36:32,039 WARN L233 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:36:32,039 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2023-08-31 22:36:32,119 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:36:32,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 879 places, 979 transitions, 2438 flow [2023-08-31 22:36:32,586 INFO L130 PetriNetUnfolder]: 161/1317 cut-off events. [2023-08-31 22:36:32,586 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-08-31 22:36:32,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1588 conditions, 1317 events. 161/1317 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 5523 event pairs, 0 based on Foata normal form. 0/1012 useless extension candidates. Maximal degree in co-relation 1482. Up to 42 conditions per place. [2023-08-31 22:36:32,635 INFO L82 GeneralOperation]: Start removeDead. Operand has 879 places, 979 transitions, 2438 flow [2023-08-31 22:36:32,657 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 879 places, 979 transitions, 2438 flow [2023-08-31 22:36:32,657 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:36:32,657 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 879 places, 979 transitions, 2438 flow [2023-08-31 22:36:32,657 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 879 places, 979 transitions, 2438 flow [2023-08-31 22:36:32,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 879 places, 979 transitions, 2438 flow [2023-08-31 22:36:33,053 INFO L130 PetriNetUnfolder]: 161/1317 cut-off events. [2023-08-31 22:36:33,053 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-08-31 22:36:33,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1588 conditions, 1317 events. 161/1317 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 5523 event pairs, 0 based on Foata normal form. 0/1012 useless extension candidates. Maximal degree in co-relation 1482. Up to 42 conditions per place. [2023-08-31 22:36:33,275 INFO L119 LiptonReduction]: Number of co-enabled transitions 854680 [2023-08-31 22:36:48,031 INFO L134 LiptonReduction]: Checked pairs total: 1366415 [2023-08-31 22:36:48,031 INFO L136 LiptonReduction]: Total number of compositions: 916 [2023-08-31 22:36:48,032 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:36:48,033 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@67b84df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:36:48,033 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:36:48,085 INFO L130 PetriNetUnfolder]: 78/443 cut-off events. [2023-08-31 22:36:48,085 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-08-31 22:36:48,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:36:48,086 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] [2023-08-31 22:36:48,086 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:36:48,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:36:48,086 INFO L85 PathProgramCache]: Analyzing trace with hash -602834282, now seen corresponding path program 1 times [2023-08-31 22:36:48,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:36:48,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392288429] [2023-08-31 22:36:48,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:36:48,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:36:48,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:36:48,119 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:36:48,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:36:48,152 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:36:48,152 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:36:48,152 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:36:48,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-31 22:36:48,153 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:36:48,153 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:36:48,153 WARN L233 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:36:48,153 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2023-08-31 22:36:48,221 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:36:48,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 921 places, 1026 transitions, 2577 flow [2023-08-31 22:36:48,643 INFO L130 PetriNetUnfolder]: 169/1381 cut-off events. [2023-08-31 22:36:48,644 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-08-31 22:36:48,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1676 conditions, 1381 events. 169/1381 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 5832 event pairs, 0 based on Foata normal form. 0/1061 useless extension candidates. Maximal degree in co-relation 1569. Up to 44 conditions per place. [2023-08-31 22:36:48,699 INFO L82 GeneralOperation]: Start removeDead. Operand has 921 places, 1026 transitions, 2577 flow [2023-08-31 22:36:48,721 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 921 places, 1026 transitions, 2577 flow [2023-08-31 22:36:48,722 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:36:48,722 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 921 places, 1026 transitions, 2577 flow [2023-08-31 22:36:48,722 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 921 places, 1026 transitions, 2577 flow [2023-08-31 22:36:48,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 921 places, 1026 transitions, 2577 flow [2023-08-31 22:36:49,252 INFO L130 PetriNetUnfolder]: 169/1381 cut-off events. [2023-08-31 22:36:49,252 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-08-31 22:36:49,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1676 conditions, 1381 events. 169/1381 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 5832 event pairs, 0 based on Foata normal form. 0/1061 useless extension candidates. Maximal degree in co-relation 1569. Up to 44 conditions per place. [2023-08-31 22:36:49,451 INFO L119 LiptonReduction]: Number of co-enabled transitions 942816 [2023-08-31 22:37:05,322 INFO L134 LiptonReduction]: Checked pairs total: 1532143 [2023-08-31 22:37:05,322 INFO L136 LiptonReduction]: Total number of compositions: 981 [2023-08-31 22:37:05,324 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:37:05,324 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@67b84df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:37:05,324 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:37:05,376 INFO L130 PetriNetUnfolder]: 82/465 cut-off events. [2023-08-31 22:37:05,376 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-08-31 22:37:05,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:37:05,376 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] [2023-08-31 22:37:05,376 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:37:05,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:37:05,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1193048213, now seen corresponding path program 1 times [2023-08-31 22:37:05,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:37:05,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648641968] [2023-08-31 22:37:05,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:37:05,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:37:05,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:37:05,410 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:37:05,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:37:05,447 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:37:05,447 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:37:05,448 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:37:05,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-31 22:37:05,448 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:37:05,448 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:37:05,448 WARN L233 ceAbstractionStarter]: 21 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:37:05,448 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 22 thread instances. [2023-08-31 22:37:05,532 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:37:05,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 963 places, 1073 transitions, 2718 flow [2023-08-31 22:37:06,018 INFO L130 PetriNetUnfolder]: 177/1445 cut-off events. [2023-08-31 22:37:06,018 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-08-31 22:37:06,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1765 conditions, 1445 events. 177/1445 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 6092 event pairs, 0 based on Foata normal form. 0/1110 useless extension candidates. Maximal degree in co-relation 1657. Up to 46 conditions per place. [2023-08-31 22:37:06,081 INFO L82 GeneralOperation]: Start removeDead. Operand has 963 places, 1073 transitions, 2718 flow [2023-08-31 22:37:06,105 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 963 places, 1073 transitions, 2718 flow [2023-08-31 22:37:06,106 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:37:06,106 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 963 places, 1073 transitions, 2718 flow [2023-08-31 22:37:06,106 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 963 places, 1073 transitions, 2718 flow [2023-08-31 22:37:06,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 963 places, 1073 transitions, 2718 flow [2023-08-31 22:37:06,574 INFO L130 PetriNetUnfolder]: 177/1445 cut-off events. [2023-08-31 22:37:06,574 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-08-31 22:37:06,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1765 conditions, 1445 events. 177/1445 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 6092 event pairs, 0 based on Foata normal form. 0/1110 useless extension candidates. Maximal degree in co-relation 1657. Up to 46 conditions per place. [2023-08-31 22:37:06,829 INFO L119 LiptonReduction]: Number of co-enabled transitions 1035276 [2023-08-31 22:37:23,617 INFO L134 LiptonReduction]: Checked pairs total: 1665179 [2023-08-31 22:37:23,617 INFO L136 LiptonReduction]: Total number of compositions: 1009 [2023-08-31 22:37:23,619 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:37:23,619 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@67b84df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:37:23,619 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:37:23,678 INFO L130 PetriNetUnfolder]: 86/487 cut-off events. [2023-08-31 22:37:23,679 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-08-31 22:37:23,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:37:23,679 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] [2023-08-31 22:37:23,679 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:37:23,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:37:23,680 INFO L85 PathProgramCache]: Analyzing trace with hash 668548331, now seen corresponding path program 1 times [2023-08-31 22:37:23,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:37:23,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82284773] [2023-08-31 22:37:23,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:37:23,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:37:23,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:37:23,731 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:37:23,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:37:23,774 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:37:23,774 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:37:23,774 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:37:23,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-31 22:37:23,775 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:37:23,775 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:37:23,775 WARN L233 ceAbstractionStarter]: 22 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:37:23,775 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 23 thread instances. [2023-08-31 22:37:23,866 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:37:23,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1005 places, 1120 transitions, 2861 flow [2023-08-31 22:37:24,389 INFO L130 PetriNetUnfolder]: 185/1509 cut-off events. [2023-08-31 22:37:24,389 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-08-31 22:37:24,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1855 conditions, 1509 events. 185/1509 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 6383 event pairs, 0 based on Foata normal form. 0/1159 useless extension candidates. Maximal degree in co-relation 1746. Up to 48 conditions per place. [2023-08-31 22:37:24,458 INFO L82 GeneralOperation]: Start removeDead. Operand has 1005 places, 1120 transitions, 2861 flow [2023-08-31 22:37:24,484 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1005 places, 1120 transitions, 2861 flow [2023-08-31 22:37:24,484 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:37:24,485 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1005 places, 1120 transitions, 2861 flow [2023-08-31 22:37:24,485 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1005 places, 1120 transitions, 2861 flow [2023-08-31 22:37:24,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1005 places, 1120 transitions, 2861 flow [2023-08-31 22:37:25,011 INFO L130 PetriNetUnfolder]: 185/1509 cut-off events. [2023-08-31 22:37:25,011 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-08-31 22:37:25,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1855 conditions, 1509 events. 185/1509 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 6383 event pairs, 0 based on Foata normal form. 0/1159 useless extension candidates. Maximal degree in co-relation 1746. Up to 48 conditions per place. [2023-08-31 22:37:25,286 INFO L119 LiptonReduction]: Number of co-enabled transitions 1132060 [2023-08-31 22:37:42,430 INFO L134 LiptonReduction]: Checked pairs total: 1822372 [2023-08-31 22:37:42,430 INFO L136 LiptonReduction]: Total number of compositions: 1058 [2023-08-31 22:37:42,432 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:37:42,432 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@67b84df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:37:42,432 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:37:42,501 INFO L130 PetriNetUnfolder]: 90/509 cut-off events. [2023-08-31 22:37:42,501 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-08-31 22:37:42,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:37:42,502 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] [2023-08-31 22:37:42,502 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:37:42,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:37:42,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1317996908, now seen corresponding path program 1 times [2023-08-31 22:37:42,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:37:42,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190454977] [2023-08-31 22:37:42,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:37:42,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:37:42,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:37:42,536 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:37:42,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:37:42,577 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:37:42,577 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:37:42,577 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:37:42,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-31 22:37:42,578 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:37:42,578 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:37:42,578 WARN L233 ceAbstractionStarter]: 23 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:37:42,578 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 24 thread instances. [2023-08-31 22:37:42,671 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:37:42,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1047 places, 1167 transitions, 3006 flow [2023-08-31 22:37:43,231 INFO L130 PetriNetUnfolder]: 193/1573 cut-off events. [2023-08-31 22:37:43,231 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-08-31 22:37:43,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1946 conditions, 1573 events. 193/1573 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 6708 event pairs, 0 based on Foata normal form. 0/1208 useless extension candidates. Maximal degree in co-relation 1836. Up to 50 conditions per place. [2023-08-31 22:37:43,307 INFO L82 GeneralOperation]: Start removeDead. Operand has 1047 places, 1167 transitions, 3006 flow [2023-08-31 22:37:43,349 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1047 places, 1167 transitions, 3006 flow [2023-08-31 22:37:43,350 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:37:43,350 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1047 places, 1167 transitions, 3006 flow [2023-08-31 22:37:43,350 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1047 places, 1167 transitions, 3006 flow [2023-08-31 22:37:43,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1047 places, 1167 transitions, 3006 flow [2023-08-31 22:37:43,926 INFO L130 PetriNetUnfolder]: 193/1573 cut-off events. [2023-08-31 22:37:43,926 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-08-31 22:37:43,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1946 conditions, 1573 events. 193/1573 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 6708 event pairs, 0 based on Foata normal form. 0/1208 useless extension candidates. Maximal degree in co-relation 1836. Up to 50 conditions per place. [2023-08-31 22:37:44,209 INFO L119 LiptonReduction]: Number of co-enabled transitions 1233168 [2023-08-31 22:38:02,830 INFO L134 LiptonReduction]: Checked pairs total: 2017121 [2023-08-31 22:38:02,830 INFO L136 LiptonReduction]: Total number of compositions: 1124 [2023-08-31 22:38:02,831 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:38:02,831 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@67b84df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:38:02,831 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:38:02,905 INFO L130 PetriNetUnfolder]: 94/531 cut-off events. [2023-08-31 22:38:02,905 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-08-31 22:38:02,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:38:02,905 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] [2023-08-31 22:38:02,905 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:38:02,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:38:02,906 INFO L85 PathProgramCache]: Analyzing trace with hash 31713886, now seen corresponding path program 1 times [2023-08-31 22:38:02,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:38:02,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724331887] [2023-08-31 22:38:02,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:38:02,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:38:02,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:38:02,945 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:38:02,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:38:02,991 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:38:02,991 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:38:02,992 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:38:02,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-31 22:38:02,992 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:38:02,992 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:38:02,992 WARN L233 ceAbstractionStarter]: 24 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:38:02,992 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 25 thread instances. [2023-08-31 22:38:03,085 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:38:03,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1089 places, 1214 transitions, 3153 flow [2023-08-31 22:38:03,722 INFO L130 PetriNetUnfolder]: 201/1637 cut-off events. [2023-08-31 22:38:03,722 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-08-31 22:38:03,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2038 conditions, 1637 events. 201/1637 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 6976 event pairs, 0 based on Foata normal form. 0/1257 useless extension candidates. Maximal degree in co-relation 1927. Up to 52 conditions per place. [2023-08-31 22:38:03,801 INFO L82 GeneralOperation]: Start removeDead. Operand has 1089 places, 1214 transitions, 3153 flow [2023-08-31 22:38:03,832 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1089 places, 1214 transitions, 3153 flow [2023-08-31 22:38:03,832 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:38:03,832 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1089 places, 1214 transitions, 3153 flow [2023-08-31 22:38:03,832 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1089 places, 1214 transitions, 3153 flow [2023-08-31 22:38:03,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1089 places, 1214 transitions, 3153 flow [2023-08-31 22:38:04,481 INFO L130 PetriNetUnfolder]: 201/1637 cut-off events. [2023-08-31 22:38:04,482 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-08-31 22:38:04,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2038 conditions, 1637 events. 201/1637 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 6976 event pairs, 0 based on Foata normal form. 0/1257 useless extension candidates. Maximal degree in co-relation 1927. Up to 52 conditions per place. [2023-08-31 22:38:04,765 INFO L119 LiptonReduction]: Number of co-enabled transitions 1338600 [2023-08-31 22:38:23,642 INFO L134 LiptonReduction]: Checked pairs total: 2145169 [2023-08-31 22:38:23,643 INFO L136 LiptonReduction]: Total number of compositions: 1138 [2023-08-31 22:38:23,644 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:38:23,644 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@67b84df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:38:23,644 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:38:23,717 INFO L130 PetriNetUnfolder]: 98/553 cut-off events. [2023-08-31 22:38:23,717 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-08-31 22:38:23,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:38:23,718 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] [2023-08-31 22:38:23,718 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:38:23,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:38:23,718 INFO L85 PathProgramCache]: Analyzing trace with hash 109474022, now seen corresponding path program 1 times [2023-08-31 22:38:23,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:38:23,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605268208] [2023-08-31 22:38:23,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:38:23,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:38:23,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:38:23,759 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:38:23,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:38:23,823 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:38:23,824 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:38:23,824 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:38:23,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-31 22:38:23,824 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:38:23,825 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:38:23,825 WARN L233 ceAbstractionStarter]: 25 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:38:23,825 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 26 thread instances. [2023-08-31 22:38:23,925 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:38:23,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1131 places, 1261 transitions, 3302 flow [2023-08-31 22:38:24,682 INFO L130 PetriNetUnfolder]: 209/1701 cut-off events. [2023-08-31 22:38:24,682 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-08-31 22:38:24,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2131 conditions, 1701 events. 209/1701 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 7276 event pairs, 0 based on Foata normal form. 0/1306 useless extension candidates. Maximal degree in co-relation 2019. Up to 54 conditions per place. [2023-08-31 22:38:24,768 INFO L82 GeneralOperation]: Start removeDead. Operand has 1131 places, 1261 transitions, 3302 flow [2023-08-31 22:38:24,801 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1131 places, 1261 transitions, 3302 flow [2023-08-31 22:38:24,801 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:38:24,801 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1131 places, 1261 transitions, 3302 flow [2023-08-31 22:38:24,802 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1131 places, 1261 transitions, 3302 flow [2023-08-31 22:38:24,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1131 places, 1261 transitions, 3302 flow [2023-08-31 22:38:25,546 INFO L130 PetriNetUnfolder]: 209/1701 cut-off events. [2023-08-31 22:38:25,546 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-08-31 22:38:25,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2131 conditions, 1701 events. 209/1701 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 7276 event pairs, 0 based on Foata normal form. 0/1306 useless extension candidates. Maximal degree in co-relation 2019. Up to 54 conditions per place. [2023-08-31 22:38:25,814 INFO L119 LiptonReduction]: Number of co-enabled transitions 1448356 [2023-08-31 22:38:45,824 INFO L134 LiptonReduction]: Checked pairs total: 2328979 [2023-08-31 22:38:45,824 INFO L136 LiptonReduction]: Total number of compositions: 1206 [2023-08-31 22:38:45,826 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:38:45,826 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@67b84df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:38:45,826 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:38:45,914 INFO L130 PetriNetUnfolder]: 102/575 cut-off events. [2023-08-31 22:38:45,915 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-08-31 22:38:45,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:38:45,915 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] [2023-08-31 22:38:45,915 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:38:45,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:38:45,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1159917733, now seen corresponding path program 1 times [2023-08-31 22:38:45,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:38:45,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721110986] [2023-08-31 22:38:45,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:38:45,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:38:45,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:38:45,948 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:38:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:38:46,035 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:38:46,035 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:38:46,036 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:38:46,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-31 22:38:46,036 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:38:46,036 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:38:46,036 WARN L233 ceAbstractionStarter]: 26 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:38:46,036 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 27 thread instances. [2023-08-31 22:38:46,144 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:38:46,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1173 places, 1308 transitions, 3453 flow [2023-08-31 22:38:46,868 INFO L130 PetriNetUnfolder]: 217/1765 cut-off events. [2023-08-31 22:38:46,868 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-08-31 22:38:46,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2225 conditions, 1765 events. 217/1765 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 7561 event pairs, 0 based on Foata normal form. 0/1355 useless extension candidates. Maximal degree in co-relation 2112. Up to 56 conditions per place. [2023-08-31 22:38:46,963 INFO L82 GeneralOperation]: Start removeDead. Operand has 1173 places, 1308 transitions, 3453 flow [2023-08-31 22:38:47,000 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1173 places, 1308 transitions, 3453 flow [2023-08-31 22:38:47,000 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:38:47,000 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1173 places, 1308 transitions, 3453 flow [2023-08-31 22:38:47,001 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1173 places, 1308 transitions, 3453 flow [2023-08-31 22:38:47,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1173 places, 1308 transitions, 3453 flow [2023-08-31 22:38:47,765 INFO L130 PetriNetUnfolder]: 217/1765 cut-off events. [2023-08-31 22:38:47,765 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-08-31 22:38:47,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2225 conditions, 1765 events. 217/1765 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 7561 event pairs, 0 based on Foata normal form. 0/1355 useless extension candidates. Maximal degree in co-relation 2112. Up to 56 conditions per place. [2023-08-31 22:38:48,088 INFO L119 LiptonReduction]: Number of co-enabled transitions 1562436 [2023-08-31 22:39:09,155 INFO L134 LiptonReduction]: Checked pairs total: 2504576 [2023-08-31 22:39:09,155 INFO L136 LiptonReduction]: Total number of compositions: 1220 [2023-08-31 22:39:09,157 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:39:09,157 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@67b84df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:39:09,157 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:39:09,245 INFO L130 PetriNetUnfolder]: 106/597 cut-off events. [2023-08-31 22:39:09,245 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-08-31 22:39:09,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:39:09,245 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] [2023-08-31 22:39:09,245 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:39:09,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:39:09,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1559994482, now seen corresponding path program 1 times [2023-08-31 22:39:09,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:39:09,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045978891] [2023-08-31 22:39:09,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:39:09,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:39:09,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:39:09,279 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:39:09,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:39:09,331 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:39:09,331 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:39:09,331 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:39:09,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-31 22:39:09,332 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:39:09,332 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:39:09,332 WARN L233 ceAbstractionStarter]: 27 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:39:09,332 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 28 thread instances. [2023-08-31 22:39:09,442 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:39:09,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1215 places, 1355 transitions, 3606 flow [2023-08-31 22:39:10,210 INFO L130 PetriNetUnfolder]: 225/1829 cut-off events. [2023-08-31 22:39:10,211 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-08-31 22:39:10,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2320 conditions, 1829 events. 225/1829 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 7831 event pairs, 0 based on Foata normal form. 0/1404 useless extension candidates. Maximal degree in co-relation 2206. Up to 58 conditions per place. [2023-08-31 22:39:10,314 INFO L82 GeneralOperation]: Start removeDead. Operand has 1215 places, 1355 transitions, 3606 flow [2023-08-31 22:39:10,353 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1215 places, 1355 transitions, 3606 flow [2023-08-31 22:39:10,354 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:39:10,354 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1215 places, 1355 transitions, 3606 flow [2023-08-31 22:39:10,354 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1215 places, 1355 transitions, 3606 flow [2023-08-31 22:39:10,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1215 places, 1355 transitions, 3606 flow [2023-08-31 22:39:11,187 INFO L130 PetriNetUnfolder]: 225/1829 cut-off events. [2023-08-31 22:39:11,188 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-08-31 22:39:11,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2320 conditions, 1829 events. 225/1829 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 7831 event pairs, 0 based on Foata normal form. 0/1404 useless extension candidates. Maximal degree in co-relation 2206. Up to 58 conditions per place. [2023-08-31 22:39:11,541 INFO L119 LiptonReduction]: Number of co-enabled transitions 1680840 [2023-08-31 22:39:33,748 INFO L134 LiptonReduction]: Checked pairs total: 2737533 [2023-08-31 22:39:33,748 INFO L136 LiptonReduction]: Total number of compositions: 1293 [2023-08-31 22:39:33,750 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:39:33,750 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@67b84df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:39:33,750 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:39:33,849 INFO L130 PetriNetUnfolder]: 110/619 cut-off events. [2023-08-31 22:39:33,849 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-08-31 22:39:33,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:39:33,850 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] [2023-08-31 22:39:33,850 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:39:33,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:39:33,850 INFO L85 PathProgramCache]: Analyzing trace with hash 2050307126, now seen corresponding path program 1 times [2023-08-31 22:39:33,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:39:33,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701038820] [2023-08-31 22:39:33,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:39:33,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:39:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:39:33,893 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:39:33,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:39:33,952 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:39:33,952 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:39:33,952 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:39:33,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-31 22:39:33,953 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:39:33,953 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:39:33,953 WARN L233 ceAbstractionStarter]: 28 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:39:33,953 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 29 thread instances. [2023-08-31 22:39:34,064 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:39:34,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1257 places, 1402 transitions, 3761 flow [2023-08-31 22:39:34,956 INFO L130 PetriNetUnfolder]: 233/1893 cut-off events. [2023-08-31 22:39:34,956 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-08-31 22:39:35,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2416 conditions, 1893 events. 233/1893 cut-off events. For 4466/4466 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 8117 event pairs, 0 based on Foata normal form. 0/1453 useless extension candidates. Maximal degree in co-relation 2301. Up to 60 conditions per place. [2023-08-31 22:39:35,066 INFO L82 GeneralOperation]: Start removeDead. Operand has 1257 places, 1402 transitions, 3761 flow [2023-08-31 22:39:35,108 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1257 places, 1402 transitions, 3761 flow [2023-08-31 22:39:35,108 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:39:35,108 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1257 places, 1402 transitions, 3761 flow [2023-08-31 22:39:35,109 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1257 places, 1402 transitions, 3761 flow [2023-08-31 22:39:35,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1257 places, 1402 transitions, 3761 flow [2023-08-31 22:39:36,013 INFO L130 PetriNetUnfolder]: 233/1893 cut-off events. [2023-08-31 22:39:36,013 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-08-31 22:39:36,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2416 conditions, 1893 events. 233/1893 cut-off events. For 4466/4466 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 8117 event pairs, 0 based on Foata normal form. 0/1453 useless extension candidates. Maximal degree in co-relation 2301. Up to 60 conditions per place. [2023-08-31 22:39:36,365 INFO L119 LiptonReduction]: Number of co-enabled transitions 1803568 [2023-08-31 22:39:58,823 INFO L134 LiptonReduction]: Checked pairs total: 2878751 [2023-08-31 22:39:58,823 INFO L136 LiptonReduction]: Total number of compositions: 1326 [2023-08-31 22:39:58,824 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:39:58,824 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@67b84df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:39:58,824 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:39:58,925 INFO L130 PetriNetUnfolder]: 114/641 cut-off events. [2023-08-31 22:39:58,925 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-08-31 22:39:58,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:39:58,925 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] [2023-08-31 22:39:58,925 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:39:58,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:39:58,925 INFO L85 PathProgramCache]: Analyzing trace with hash 375934376, now seen corresponding path program 1 times [2023-08-31 22:39:58,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:39:58,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750572804] [2023-08-31 22:39:58,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:39:58,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:39:58,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:39:58,964 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:39:58,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:39:59,017 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:39:59,018 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:39:59,018 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:39:59,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-31 22:39:59,018 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:39:59,018 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:39:59,019 WARN L233 ceAbstractionStarter]: 29 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:39:59,019 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 30 thread instances. [2023-08-31 22:39:59,135 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:39:59,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1299 places, 1449 transitions, 3918 flow [2023-08-31 22:40:00,119 INFO L130 PetriNetUnfolder]: 241/1957 cut-off events. [2023-08-31 22:40:00,119 INFO L131 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2023-08-31 22:40:00,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2513 conditions, 1957 events. 241/1957 cut-off events. For 4930/4930 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 8412 event pairs, 0 based on Foata normal form. 0/1502 useless extension candidates. Maximal degree in co-relation 2397. Up to 62 conditions per place. [2023-08-31 22:40:00,220 INFO L82 GeneralOperation]: Start removeDead. Operand has 1299 places, 1449 transitions, 3918 flow [2023-08-31 22:40:00,258 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1299 places, 1449 transitions, 3918 flow [2023-08-31 22:40:00,258 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:40:00,258 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1299 places, 1449 transitions, 3918 flow [2023-08-31 22:40:00,258 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1299 places, 1449 transitions, 3918 flow [2023-08-31 22:40:00,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1299 places, 1449 transitions, 3918 flow [2023-08-31 22:40:01,135 INFO L130 PetriNetUnfolder]: 241/1957 cut-off events. [2023-08-31 22:40:01,135 INFO L131 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2023-08-31 22:40:01,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2513 conditions, 1957 events. 241/1957 cut-off events. For 4930/4930 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 8412 event pairs, 0 based on Foata normal form. 0/1502 useless extension candidates. Maximal degree in co-relation 2397. Up to 62 conditions per place. [2023-08-31 22:40:01,702 INFO L119 LiptonReduction]: Number of co-enabled transitions 1930620 [2023-08-31 22:40:25,610 INFO L134 LiptonReduction]: Checked pairs total: 3145567 [2023-08-31 22:40:25,611 INFO L136 LiptonReduction]: Total number of compositions: 1384 [2023-08-31 22:40:25,612 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:40:25,612 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@67b84df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:40:25,612 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:40:25,719 INFO L130 PetriNetUnfolder]: 118/663 cut-off events. [2023-08-31 22:40:25,719 INFO L131 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2023-08-31 22:40:25,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:40:25,719 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] [2023-08-31 22:40:25,719 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:40:25,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:40:25,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1226130790, now seen corresponding path program 1 times [2023-08-31 22:40:25,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:40:25,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882307275] [2023-08-31 22:40:25,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:40:25,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:40:25,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:40:25,759 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:40:25,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:40:25,814 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:40:25,815 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:40:25,815 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:40:25,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-31 22:40:25,815 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:40:25,816 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:40:25,816 WARN L233 ceAbstractionStarter]: 30 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:40:25,816 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 31 thread instances. [2023-08-31 22:40:25,940 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:40:25,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1341 places, 1496 transitions, 4077 flow [2023-08-31 22:40:26,996 INFO L130 PetriNetUnfolder]: 249/2021 cut-off events. [2023-08-31 22:40:26,996 INFO L131 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2023-08-31 22:40:27,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2611 conditions, 2021 events. 249/2021 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 8750 event pairs, 0 based on Foata normal form. 0/1551 useless extension candidates. Maximal degree in co-relation 2494. Up to 64 conditions per place. [2023-08-31 22:40:27,127 INFO L82 GeneralOperation]: Start removeDead. Operand has 1341 places, 1496 transitions, 4077 flow [2023-08-31 22:40:27,178 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1341 places, 1496 transitions, 4077 flow [2023-08-31 22:40:27,178 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:40:27,178 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1341 places, 1496 transitions, 4077 flow [2023-08-31 22:40:27,178 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1341 places, 1496 transitions, 4077 flow [2023-08-31 22:40:27,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1341 places, 1496 transitions, 4077 flow [2023-08-31 22:40:28,159 INFO L130 PetriNetUnfolder]: 249/2021 cut-off events. [2023-08-31 22:40:28,159 INFO L131 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2023-08-31 22:40:28,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2611 conditions, 2021 events. 249/2021 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 8750 event pairs, 0 based on Foata normal form. 0/1551 useless extension candidates. Maximal degree in co-relation 2494. Up to 64 conditions per place. [2023-08-31 22:40:28,693 INFO L119 LiptonReduction]: Number of co-enabled transitions 2061996 [2023-08-31 22:40:52,992 INFO L134 LiptonReduction]: Checked pairs total: 3264428 [2023-08-31 22:40:52,992 INFO L136 LiptonReduction]: Total number of compositions: 1409 [2023-08-31 22:40:52,994 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:40:52,994 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@67b84df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:40:52,994 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:40:53,107 INFO L130 PetriNetUnfolder]: 122/685 cut-off events. [2023-08-31 22:40:53,107 INFO L131 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2023-08-31 22:40:53,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:40:53,108 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] [2023-08-31 22:40:53,108 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:40:53,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:40:53,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1124134691, now seen corresponding path program 1 times [2023-08-31 22:40:53,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:40:53,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497547038] [2023-08-31 22:40:53,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:40:53,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:40:53,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:40:53,152 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:40:53,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:40:53,216 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:40:53,216 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:40:53,217 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:40:53,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-31 22:40:53,217 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:40:53,217 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:40:53,217 WARN L233 ceAbstractionStarter]: 31 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:40:53,217 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 32 thread instances. [2023-08-31 22:40:53,348 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:40:53,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1383 places, 1543 transitions, 4238 flow [2023-08-31 22:40:54,508 INFO L130 PetriNetUnfolder]: 257/2085 cut-off events. [2023-08-31 22:40:54,508 INFO L131 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2023-08-31 22:40:54,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2710 conditions, 2085 events. 257/2085 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 9071 event pairs, 0 based on Foata normal form. 0/1600 useless extension candidates. Maximal degree in co-relation 2592. Up to 66 conditions per place. [2023-08-31 22:40:54,642 INFO L82 GeneralOperation]: Start removeDead. Operand has 1383 places, 1543 transitions, 4238 flow [2023-08-31 22:40:54,706 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1383 places, 1543 transitions, 4238 flow [2023-08-31 22:40:54,707 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:40:54,707 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1383 places, 1543 transitions, 4238 flow [2023-08-31 22:40:54,707 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1383 places, 1543 transitions, 4238 flow [2023-08-31 22:40:54,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1383 places, 1543 transitions, 4238 flow [2023-08-31 22:40:55,874 INFO L130 PetriNetUnfolder]: 257/2085 cut-off events. [2023-08-31 22:40:55,874 INFO L131 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2023-08-31 22:40:55,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2710 conditions, 2085 events. 257/2085 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 9071 event pairs, 0 based on Foata normal form. 0/1600 useless extension candidates. Maximal degree in co-relation 2592. Up to 66 conditions per place. [2023-08-31 22:40:56,328 INFO L119 LiptonReduction]: Number of co-enabled transitions 2197696 [2023-08-31 22:41:21,974 INFO L134 LiptonReduction]: Checked pairs total: 3523378 [2023-08-31 22:41:21,974 INFO L136 LiptonReduction]: Total number of compositions: 1468 [2023-08-31 22:41:21,975 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:41:21,976 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@67b84df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:41:21,976 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:41:22,099 INFO L130 PetriNetUnfolder]: 126/707 cut-off events. [2023-08-31 22:41:22,099 INFO L131 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2023-08-31 22:41:22,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:41:22,099 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] [2023-08-31 22:41:22,099 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:41:22,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:41:22,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1611552898, now seen corresponding path program 1 times [2023-08-31 22:41:22,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:41:22,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649976867] [2023-08-31 22:41:22,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:41:22,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:41:22,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:41:22,141 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:41:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:41:22,212 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:41:22,212 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:41:22,212 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:41:22,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-31 22:41:22,213 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:41:22,213 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:41:22,214 WARN L233 ceAbstractionStarter]: 32 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:41:22,214 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 33 thread instances. [2023-08-31 22:41:22,343 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:41:22,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1425 places, 1590 transitions, 4401 flow [2023-08-31 22:41:23,563 INFO L130 PetriNetUnfolder]: 265/2149 cut-off events. [2023-08-31 22:41:23,563 INFO L131 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2023-08-31 22:41:23,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2810 conditions, 2149 events. 265/2149 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 9246 event pairs, 0 based on Foata normal form. 0/1649 useless extension candidates. Maximal degree in co-relation 2691. Up to 68 conditions per place. [2023-08-31 22:41:23,662 INFO L82 GeneralOperation]: Start removeDead. Operand has 1425 places, 1590 transitions, 4401 flow [2023-08-31 22:41:23,698 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1425 places, 1590 transitions, 4401 flow [2023-08-31 22:41:23,698 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:41:23,699 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1425 places, 1590 transitions, 4401 flow [2023-08-31 22:41:23,699 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1425 places, 1590 transitions, 4401 flow [2023-08-31 22:41:23,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1425 places, 1590 transitions, 4401 flow [2023-08-31 22:41:24,799 INFO L130 PetriNetUnfolder]: 265/2149 cut-off events. [2023-08-31 22:41:24,799 INFO L131 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2023-08-31 22:41:24,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2810 conditions, 2149 events. 265/2149 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 9246 event pairs, 0 based on Foata normal form. 0/1649 useless extension candidates. Maximal degree in co-relation 2691. Up to 68 conditions per place. [2023-08-31 22:41:25,715 INFO L119 LiptonReduction]: Number of co-enabled transitions 2337720 [2023-08-31 22:41:52,014 INFO L134 LiptonReduction]: Checked pairs total: 3795840 [2023-08-31 22:41:52,014 INFO L136 LiptonReduction]: Total number of compositions: 1513 [2023-08-31 22:41:52,016 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:41:52,016 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@67b84df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:41:52,016 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:41:52,146 INFO L130 PetriNetUnfolder]: 130/729 cut-off events. [2023-08-31 22:41:52,147 INFO L131 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2023-08-31 22:41:52,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:41:52,147 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] [2023-08-31 22:41:52,147 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:41:52,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:41:52,147 INFO L85 PathProgramCache]: Analyzing trace with hash 651855385, now seen corresponding path program 1 times [2023-08-31 22:41:52,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:41:52,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282039220] [2023-08-31 22:41:52,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:41:52,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:41:52,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:41:52,194 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:41:52,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:41:52,248 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:41:52,248 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:41:52,248 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:41:52,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-31 22:41:52,249 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:41:52,249 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:41:52,249 WARN L233 ceAbstractionStarter]: 33 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:41:52,249 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 34 thread instances. [2023-08-31 22:41:52,362 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:41:52,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1467 places, 1637 transitions, 4566 flow [2023-08-31 22:41:53,609 INFO L130 PetriNetUnfolder]: 273/2213 cut-off events. [2023-08-31 22:41:53,609 INFO L131 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2023-08-31 22:41:53,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2911 conditions, 2213 events. 273/2213 cut-off events. For 7106/7106 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 9541 event pairs, 0 based on Foata normal form. 0/1698 useless extension candidates. Maximal degree in co-relation 2791. Up to 70 conditions per place. [2023-08-31 22:41:53,722 INFO L82 GeneralOperation]: Start removeDead. Operand has 1467 places, 1637 transitions, 4566 flow [2023-08-31 22:41:53,783 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1467 places, 1637 transitions, 4566 flow [2023-08-31 22:41:53,783 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:41:53,783 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1467 places, 1637 transitions, 4566 flow [2023-08-31 22:41:53,783 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1467 places, 1637 transitions, 4566 flow [2023-08-31 22:41:53,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1467 places, 1637 transitions, 4566 flow [2023-08-31 22:41:55,014 INFO L130 PetriNetUnfolder]: 273/2213 cut-off events. [2023-08-31 22:41:55,014 INFO L131 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2023-08-31 22:41:55,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2911 conditions, 2213 events. 273/2213 cut-off events. For 7106/7106 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 9541 event pairs, 0 based on Foata normal form. 0/1698 useless extension candidates. Maximal degree in co-relation 2791. Up to 70 conditions per place. [2023-08-31 22:41:55,617 INFO L119 LiptonReduction]: Number of co-enabled transitions 2482068 [2023-08-31 22:42:23,162 INFO L134 LiptonReduction]: Checked pairs total: 3964677 [2023-08-31 22:42:23,162 INFO L136 LiptonReduction]: Total number of compositions: 1554 [2023-08-31 22:42:23,163 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:42:23,163 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@67b84df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:42:23,164 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:42:23,301 INFO L130 PetriNetUnfolder]: 134/751 cut-off events. [2023-08-31 22:42:23,301 INFO L131 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2023-08-31 22:42:23,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:42:23,302 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] [2023-08-31 22:42:23,302 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:42:23,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:42:23,302 INFO L85 PathProgramCache]: Analyzing trace with hash -443676759, now seen corresponding path program 1 times [2023-08-31 22:42:23,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:42:23,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826774371] [2023-08-31 22:42:23,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:42:23,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:42:23,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:42:23,348 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:42:23,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:42:23,403 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:42:23,403 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:42:23,404 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:42:23,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-31 22:42:23,404 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:42:23,404 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:42:23,404 WARN L233 ceAbstractionStarter]: 34 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:42:23,404 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 35 thread instances. [2023-08-31 22:42:23,529 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:42:23,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1509 places, 1684 transitions, 4733 flow [2023-08-31 22:42:24,816 INFO L130 PetriNetUnfolder]: 281/2277 cut-off events. [2023-08-31 22:42:24,816 INFO L131 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2023-08-31 22:42:24,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3013 conditions, 2277 events. 281/2277 cut-off events. For 7735/7735 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 9855 event pairs, 0 based on Foata normal form. 0/1747 useless extension candidates. Maximal degree in co-relation 2892. Up to 72 conditions per place. [2023-08-31 22:42:24,985 INFO L82 GeneralOperation]: Start removeDead. Operand has 1509 places, 1684 transitions, 4733 flow [2023-08-31 22:42:25,071 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1509 places, 1684 transitions, 4733 flow [2023-08-31 22:42:25,072 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:42:25,072 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1509 places, 1684 transitions, 4733 flow [2023-08-31 22:42:25,072 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1509 places, 1684 transitions, 4733 flow [2023-08-31 22:42:25,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1509 places, 1684 transitions, 4733 flow [2023-08-31 22:42:26,316 INFO L130 PetriNetUnfolder]: 281/2277 cut-off events. [2023-08-31 22:42:26,316 INFO L131 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2023-08-31 22:42:26,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3013 conditions, 2277 events. 281/2277 cut-off events. For 7735/7735 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 9855 event pairs, 0 based on Foata normal form. 0/1747 useless extension candidates. Maximal degree in co-relation 2892. Up to 72 conditions per place. [2023-08-31 22:42:27,076 INFO L119 LiptonReduction]: Number of co-enabled transitions 2630740 [2023-08-31 22:42:55,373 INFO L134 LiptonReduction]: Checked pairs total: 4231653 [2023-08-31 22:42:55,373 INFO L136 LiptonReduction]: Total number of compositions: 1607 [2023-08-31 22:42:55,375 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:42:55,375 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@67b84df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:42:55,375 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:42:55,517 INFO L130 PetriNetUnfolder]: 138/773 cut-off events. [2023-08-31 22:42:55,517 INFO L131 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2023-08-31 22:42:55,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:42:55,517 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] [2023-08-31 22:42:55,517 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:42:55,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:42:55,518 INFO L85 PathProgramCache]: Analyzing trace with hash 365394963, now seen corresponding path program 1 times [2023-08-31 22:42:55,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:42:55,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046708590] [2023-08-31 22:42:55,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:42:55,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:42:55,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:42:55,561 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:42:55,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:42:55,619 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:42:55,619 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:42:55,619 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:42:55,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-31 22:42:55,619 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:42:55,620 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:42:55,620 WARN L233 ceAbstractionStarter]: 35 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:42:55,620 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 36 thread instances. [2023-08-31 22:42:55,735 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:42:55,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1551 places, 1731 transitions, 4902 flow [2023-08-31 22:42:57,151 INFO L130 PetriNetUnfolder]: 289/2341 cut-off events. [2023-08-31 22:42:57,152 INFO L131 PetriNetUnfolder]: For 8400/8400 co-relation queries the response was YES. [2023-08-31 22:42:57,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3116 conditions, 2341 events. 289/2341 cut-off events. For 8400/8400 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 10124 event pairs, 0 based on Foata normal form. 0/1796 useless extension candidates. Maximal degree in co-relation 2994. Up to 74 conditions per place. [2023-08-31 22:42:57,298 INFO L82 GeneralOperation]: Start removeDead. Operand has 1551 places, 1731 transitions, 4902 flow [2023-08-31 22:42:57,377 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1551 places, 1731 transitions, 4902 flow [2023-08-31 22:42:57,377 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:42:57,377 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1551 places, 1731 transitions, 4902 flow [2023-08-31 22:42:57,378 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1551 places, 1731 transitions, 4902 flow [2023-08-31 22:42:57,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1551 places, 1731 transitions, 4902 flow [2023-08-31 22:42:58,763 INFO L130 PetriNetUnfolder]: 289/2341 cut-off events. [2023-08-31 22:42:58,763 INFO L131 PetriNetUnfolder]: For 8400/8400 co-relation queries the response was YES. [2023-08-31 22:42:58,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3116 conditions, 2341 events. 289/2341 cut-off events. For 8400/8400 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 10124 event pairs, 0 based on Foata normal form. 0/1796 useless extension candidates. Maximal degree in co-relation 2994. Up to 74 conditions per place. [2023-08-31 22:42:59,782 INFO L119 LiptonReduction]: Number of co-enabled transitions 2783736 [2023-08-31 22:43:30,337 INFO L134 LiptonReduction]: Checked pairs total: 4459981 [2023-08-31 22:43:30,338 INFO L136 LiptonReduction]: Total number of compositions: 1644 [2023-08-31 22:43:30,339 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:43:30,339 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@67b84df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:43:30,339 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:43:30,509 INFO L130 PetriNetUnfolder]: 142/795 cut-off events. [2023-08-31 22:43:30,509 INFO L131 PetriNetUnfolder]: For 8400/8400 co-relation queries the response was YES. [2023-08-31 22:43:30,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:43:30,510 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] [2023-08-31 22:43:30,510 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:43:30,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:43:30,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1167823013, now seen corresponding path program 1 times [2023-08-31 22:43:30,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:43:30,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501089463] [2023-08-31 22:43:30,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:43:30,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:43:30,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:43:30,621 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:43:30,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:43:30,679 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:43:30,679 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:43:30,679 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:43:30,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-31 22:43:30,680 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:43:30,680 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:43:30,680 WARN L233 ceAbstractionStarter]: 36 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:43:30,680 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 37 thread instances. [2023-08-31 22:43:30,823 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:43:30,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1593 places, 1778 transitions, 5073 flow [2023-08-31 22:43:32,628 INFO L130 PetriNetUnfolder]: 297/2405 cut-off events. [2023-08-31 22:43:32,628 INFO L131 PetriNetUnfolder]: For 9102/9102 co-relation queries the response was YES. [2023-08-31 22:43:32,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3220 conditions, 2405 events. 297/2405 cut-off events. For 9102/9102 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 10401 event pairs, 0 based on Foata normal form. 0/1845 useless extension candidates. Maximal degree in co-relation 3097. Up to 76 conditions per place. [2023-08-31 22:43:32,749 INFO L82 GeneralOperation]: Start removeDead. Operand has 1593 places, 1778 transitions, 5073 flow [2023-08-31 22:43:32,792 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1593 places, 1778 transitions, 5073 flow [2023-08-31 22:43:32,792 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:43:32,792 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1593 places, 1778 transitions, 5073 flow [2023-08-31 22:43:32,792 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1593 places, 1778 transitions, 5073 flow [2023-08-31 22:43:32,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1593 places, 1778 transitions, 5073 flow [2023-08-31 22:43:34,446 INFO L130 PetriNetUnfolder]: 297/2405 cut-off events. [2023-08-31 22:43:34,446 INFO L131 PetriNetUnfolder]: For 9102/9102 co-relation queries the response was YES. [2023-08-31 22:43:34,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3220 conditions, 2405 events. 297/2405 cut-off events. For 9102/9102 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 10401 event pairs, 0 based on Foata normal form. 0/1845 useless extension candidates. Maximal degree in co-relation 3097. Up to 76 conditions per place. [2023-08-31 22:43:35,225 INFO L119 LiptonReduction]: Number of co-enabled transitions 2941056 [2023-08-31 22:44:05,465 INFO L134 LiptonReduction]: Checked pairs total: 4732849 [2023-08-31 22:44:05,465 INFO L136 LiptonReduction]: Total number of compositions: 1674 [2023-08-31 22:44:05,466 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:44:05,467 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@67b84df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:44:05,467 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:44:05,627 INFO L130 PetriNetUnfolder]: 146/817 cut-off events. [2023-08-31 22:44:05,627 INFO L131 PetriNetUnfolder]: For 9102/9102 co-relation queries the response was YES. [2023-08-31 22:44:05,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:44:05,627 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] [2023-08-31 22:44:05,627 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:44:05,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:44:05,628 INFO L85 PathProgramCache]: Analyzing trace with hash -622289103, now seen corresponding path program 1 times [2023-08-31 22:44:05,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:44:05,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801967391] [2023-08-31 22:44:05,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:44:05,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:44:05,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:44:05,675 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:44:05,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:44:05,736 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:44:05,736 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:44:05,737 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:44:05,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-08-31 22:44:05,737 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:44:05,737 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:44:05,738 WARN L233 ceAbstractionStarter]: 37 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:44:05,738 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 38 thread instances. [2023-08-31 22:44:05,880 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:44:05,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1635 places, 1825 transitions, 5246 flow [2023-08-31 22:44:07,590 INFO L130 PetriNetUnfolder]: 305/2469 cut-off events. [2023-08-31 22:44:07,590 INFO L131 PetriNetUnfolder]: For 9842/9842 co-relation queries the response was YES. [2023-08-31 22:44:07,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3325 conditions, 2469 events. 305/2469 cut-off events. For 9842/9842 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 10716 event pairs, 0 based on Foata normal form. 0/1894 useless extension candidates. Maximal degree in co-relation 3201. Up to 78 conditions per place. [2023-08-31 22:44:07,729 INFO L82 GeneralOperation]: Start removeDead. Operand has 1635 places, 1825 transitions, 5246 flow [2023-08-31 22:44:07,778 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1635 places, 1825 transitions, 5246 flow [2023-08-31 22:44:07,778 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:44:07,778 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1635 places, 1825 transitions, 5246 flow [2023-08-31 22:44:07,778 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1635 places, 1825 transitions, 5246 flow [2023-08-31 22:44:07,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1635 places, 1825 transitions, 5246 flow [2023-08-31 22:44:09,557 INFO L130 PetriNetUnfolder]: 305/2469 cut-off events. [2023-08-31 22:44:09,558 INFO L131 PetriNetUnfolder]: For 9842/9842 co-relation queries the response was YES. [2023-08-31 22:44:09,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3325 conditions, 2469 events. 305/2469 cut-off events. For 9842/9842 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 10716 event pairs, 0 based on Foata normal form. 0/1894 useless extension candidates. Maximal degree in co-relation 3201. Up to 78 conditions per place. [2023-08-31 22:44:10,465 INFO L119 LiptonReduction]: Number of co-enabled transitions 3102700 [2023-08-31 22:44:41,444 INFO L134 LiptonReduction]: Checked pairs total: 4989372 [2023-08-31 22:44:41,444 INFO L136 LiptonReduction]: Total number of compositions: 1721 [2023-08-31 22:44:41,445 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:44:41,446 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@67b84df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:44:41,446 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:44:41,614 INFO L130 PetriNetUnfolder]: 150/839 cut-off events. [2023-08-31 22:44:41,615 INFO L131 PetriNetUnfolder]: For 9842/9842 co-relation queries the response was YES. [2023-08-31 22:44:41,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:44:41,615 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] [2023-08-31 22:44:41,615 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:44:41,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:44:41,615 INFO L85 PathProgramCache]: Analyzing trace with hash 953509585, now seen corresponding path program 1 times [2023-08-31 22:44:41,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:44:41,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650328327] [2023-08-31 22:44:41,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:44:41,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:44:41,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:44:41,665 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:44:41,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:44:41,726 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:44:41,727 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:44:41,727 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:44:41,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-08-31 22:44:41,727 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:44:41,727 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:44:41,728 WARN L233 ceAbstractionStarter]: 38 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:44:41,728 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 39 thread instances. [2023-08-31 22:44:41,906 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:44:41,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1677 places, 1872 transitions, 5421 flow [2023-08-31 22:44:44,049 INFO L130 PetriNetUnfolder]: 313/2533 cut-off events. [2023-08-31 22:44:44,050 INFO L131 PetriNetUnfolder]: For 10621/10621 co-relation queries the response was YES. [2023-08-31 22:44:44,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3431 conditions, 2533 events. 313/2533 cut-off events. For 10621/10621 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 11057 event pairs, 0 based on Foata normal form. 0/1943 useless extension candidates. Maximal degree in co-relation 3306. Up to 80 conditions per place. [2023-08-31 22:44:44,183 INFO L82 GeneralOperation]: Start removeDead. Operand has 1677 places, 1872 transitions, 5421 flow [2023-08-31 22:44:44,236 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1677 places, 1872 transitions, 5421 flow [2023-08-31 22:44:44,236 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:44:44,236 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1677 places, 1872 transitions, 5421 flow [2023-08-31 22:44:44,236 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1677 places, 1872 transitions, 5421 flow [2023-08-31 22:44:44,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1677 places, 1872 transitions, 5421 flow [2023-08-31 22:44:46,166 INFO L130 PetriNetUnfolder]: 313/2533 cut-off events. [2023-08-31 22:44:46,166 INFO L131 PetriNetUnfolder]: For 10621/10621 co-relation queries the response was YES. [2023-08-31 22:44:46,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3431 conditions, 2533 events. 313/2533 cut-off events. For 10621/10621 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 11057 event pairs, 0 based on Foata normal form. 0/1943 useless extension candidates. Maximal degree in co-relation 3306. Up to 80 conditions per place. [2023-08-31 22:44:47,492 INFO L119 LiptonReduction]: Number of co-enabled transitions 3268668 Killed by 15