./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-2.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cb8c1938cc441082517c5681097f5f6483a36107a8ec46d723b101297930909d --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 04:58:42,178 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 04:58:42,181 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 04:58:42,225 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 04:58:42,227 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 04:58:42,231 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 04:58:42,233 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 04:58:42,236 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 04:58:42,238 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 04:58:42,243 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 04:58:42,244 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 04:58:42,245 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 04:58:42,245 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 04:58:42,246 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 04:58:42,247 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 04:58:42,248 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 04:58:42,248 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 04:58:42,249 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 04:58:42,250 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 04:58:42,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 04:58:42,253 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 04:58:42,254 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 04:58:42,255 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 04:58:42,256 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 04:58:42,259 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 04:58:42,265 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 04:58:42,265 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 04:58:42,266 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 04:58:42,267 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 04:58:42,268 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 04:58:42,269 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 04:58:42,270 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 04:58:42,270 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 04:58:42,271 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 04:58:42,272 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 04:58:42,272 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 04:58:42,273 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 04:58:42,273 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 04:58:42,273 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 04:58:42,274 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 04:58:42,277 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 04:58:42,278 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-09-01 04:58:42,301 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 04:58:42,301 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 04:58:42,303 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 04:58:42,303 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 04:58:42,304 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 04:58:42,304 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 04:58:42,305 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 04:58:42,305 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 04:58:42,305 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 04:58:42,306 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 04:58:42,306 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 04:58:42,307 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 04:58:42,307 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 04:58:42,307 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 04:58:42,307 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 04:58:42,307 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 04:58:42,308 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 04:58:42,308 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 04:58:42,308 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-09-01 04:58:42,308 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 04:58:42,308 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 04:58:42,309 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 04:58:42,309 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 04:58:42,309 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 04:58:42,309 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 04:58:42,309 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 04:58:42,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:58:42,310 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 04:58:42,310 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 04:58:42,310 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 04:58:42,310 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 04:58:42,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 04:58:42,311 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 04:58:42,311 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 04:58:42,311 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 04:58:42,312 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 04:58:42,312 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 04:58:42,312 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb8c1938cc441082517c5681097f5f6483a36107a8ec46d723b101297930909d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 04:58:42,630 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 04:58:42,652 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 04:58:42,654 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 04:58:42,655 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 04:58:42,656 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 04:58:42,657 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-2.i [2023-09-01 04:58:43,894 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 04:58:44,176 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 04:58:44,177 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-2.i [2023-09-01 04:58:44,189 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e26e5886f/26b7446bb2a848c1b769042a9afd4f7e/FLAG3aa9acfd5 [2023-09-01 04:58:44,200 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e26e5886f/26b7446bb2a848c1b769042a9afd4f7e [2023-09-01 04:58:44,202 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 04:58:44,204 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 04:58:44,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 04:58:44,205 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 04:58:44,213 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 04:58:44,213 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:58:44" (1/1) ... [2023-09-01 04:58:44,214 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49f9c639 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:58:44, skipping insertion in model container [2023-09-01 04:58:44,214 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 04:58:44" (1/1) ... [2023-09-01 04:58:44,220 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 04:58:44,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 04:58:44,567 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-2.i[31163,31176] [2023-09-01 04:58:44,579 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:58:44,591 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 04:58:44,660 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-2.i[31163,31176] [2023-09-01 04:58:44,692 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 04:58:44,730 INFO L208 MainTranslator]: Completed translation [2023-09-01 04:58:44,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:58:44 WrapperNode [2023-09-01 04:58:44,730 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 04:58:44,732 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 04:58:44,732 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 04:58:44,732 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 04:58:44,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:58:44" (1/1) ... [2023-09-01 04:58:44,769 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:58:44" (1/1) ... [2023-09-01 04:58:44,801 INFO L138 Inliner]: procedures = 177, calls = 47, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 198 [2023-09-01 04:58:44,802 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 04:58:44,803 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 04:58:44,803 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 04:58:44,804 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 04:58:44,811 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:58:44" (1/1) ... [2023-09-01 04:58:44,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:58:44" (1/1) ... [2023-09-01 04:58:44,828 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:58:44" (1/1) ... [2023-09-01 04:58:44,832 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:58:44" (1/1) ... [2023-09-01 04:58:44,838 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:58:44" (1/1) ... [2023-09-01 04:58:44,846 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:58:44" (1/1) ... [2023-09-01 04:58:44,852 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:58:44" (1/1) ... [2023-09-01 04:58:44,858 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:58:44" (1/1) ... [2023-09-01 04:58:44,861 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 04:58:44,862 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 04:58:44,865 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 04:58:44,865 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 04:58:44,866 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:58:44" (1/1) ... [2023-09-01 04:58:44,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 04:58:44,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 04:58:44,900 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 04:58:44,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 04:58:44,927 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 04:58:44,928 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-09-01 04:58:44,928 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-09-01 04:58:44,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 04:58:44,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 04:58:44,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 04:58:44,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 04:58:44,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 04:58:44,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 04:58:44,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 04:58:44,931 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 04:58:45,107 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 04:58:45,113 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 04:58:45,501 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 04:58:45,635 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 04:58:45,636 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 04:58:45,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 04:58:45 BoogieIcfgContainer [2023-09-01 04:58:45,639 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 04:58:45,641 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 04:58:45,641 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 04:58:45,643 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 04:58:45,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 04:58:44" (1/3) ... [2023-09-01 04:58:45,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cbb6280 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 04:58:45, skipping insertion in model container [2023-09-01 04:58:45,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 04:58:44" (2/3) ... [2023-09-01 04:58:45,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cbb6280 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 04:58:45, skipping insertion in model container [2023-09-01 04:58:45,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 04:58:45" (3/3) ... [2023-09-01 04:58:45,648 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longer-2.i [2023-09-01 04:58:45,656 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 04:58:45,664 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 04:58:45,665 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-09-01 04:58:45,665 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 04:58:45,724 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 04:58:45,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 133 transitions, 271 flow [2023-09-01 04:58:45,805 INFO L130 PetriNetUnfolder]: 11/143 cut-off events. [2023-09-01 04:58:45,808 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 04:58:45,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 143 events. 11/143 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 136 event pairs, 0 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 109. Up to 4 conditions per place. [2023-09-01 04:58:45,813 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 133 transitions, 271 flow [2023-09-01 04:58:45,818 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 133 transitions, 271 flow [2023-09-01 04:58:45,821 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:58:45,829 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 133 transitions, 271 flow [2023-09-01 04:58:45,831 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 133 transitions, 271 flow [2023-09-01 04:58:45,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 133 transitions, 271 flow [2023-09-01 04:58:45,857 INFO L130 PetriNetUnfolder]: 11/143 cut-off events. [2023-09-01 04:58:45,857 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 04:58:45,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 143 events. 11/143 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 136 event pairs, 0 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 109. Up to 4 conditions per place. [2023-09-01 04:58:45,861 INFO L119 LiptonReduction]: Number of co-enabled transitions 2522 [2023-09-01 04:58:50,787 INFO L134 LiptonReduction]: Checked pairs total: 3076 [2023-09-01 04:58:50,787 INFO L136 LiptonReduction]: Total number of compositions: 136 [2023-09-01 04:58:50,800 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 04:58:50,806 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@60b140b6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:58:50,806 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 04:58:50,815 INFO L130 PetriNetUnfolder]: 2/13 cut-off events. [2023-09-01 04:58:50,817 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 04:58:50,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:58:50,818 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-09-01 04:58:50,818 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 04:58:50,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:58:50,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1550590541, now seen corresponding path program 1 times [2023-09-01 04:58:50,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:58:50,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778394384] [2023-09-01 04:58:50,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:58:50,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:58:50,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:58:50,921 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 04:58:50,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:58:50,957 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 04:58:50,958 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 04:58:50,959 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 04:58:50,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 04:58:50,961 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 04:58:50,964 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 04:58:50,965 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 04:58:50,965 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 04:58:51,018 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 04:58:51,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 231 transitions, 474 flow [2023-09-01 04:58:51,067 INFO L130 PetriNetUnfolder]: 21/253 cut-off events. [2023-09-01 04:58:51,068 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 04:58:51,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 253 events. 21/253 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 535 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 206. Up to 6 conditions per place. [2023-09-01 04:58:51,072 INFO L82 GeneralOperation]: Start removeDead. Operand has 217 places, 231 transitions, 474 flow [2023-09-01 04:58:51,074 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 217 places, 231 transitions, 474 flow [2023-09-01 04:58:51,078 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:58:51,078 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 217 places, 231 transitions, 474 flow [2023-09-01 04:58:51,078 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 217 places, 231 transitions, 474 flow [2023-09-01 04:58:51,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 231 transitions, 474 flow [2023-09-01 04:58:51,128 INFO L130 PetriNetUnfolder]: 21/253 cut-off events. [2023-09-01 04:58:51,129 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 04:58:51,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 253 events. 21/253 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 535 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 206. Up to 6 conditions per place. [2023-09-01 04:58:51,143 INFO L119 LiptonReduction]: Number of co-enabled transitions 24056 [2023-09-01 04:58:56,515 INFO L134 LiptonReduction]: Checked pairs total: 65438 [2023-09-01 04:58:56,515 INFO L136 LiptonReduction]: Total number of compositions: 183 [2023-09-01 04:58:56,518 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 04:58:56,519 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@60b140b6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:58:56,519 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 04:58:56,524 INFO L130 PetriNetUnfolder]: 3/31 cut-off events. [2023-09-01 04:58:56,524 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 04:58:56,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:58:56,524 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-09-01 04:58:56,525 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 04:58:56,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:58:56,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1068023603, now seen corresponding path program 1 times [2023-09-01 04:58:56,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:58:56,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518518338] [2023-09-01 04:58:56,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:58:56,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:58:56,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:58:56,584 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 04:58:56,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:58:56,615 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 04:58:56,616 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 04:58:56,616 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 04:58:56,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 04:58:56,617 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 04:58:56,617 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 04:58:56,618 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 04:58:56,618 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-09-01 04:58:56,676 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 04:58:56,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 308 places, 329 transitions, 679 flow [2023-09-01 04:58:56,751 INFO L130 PetriNetUnfolder]: 31/363 cut-off events. [2023-09-01 04:58:56,752 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 04:58:56,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 363 events. 31/363 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1085 event pairs, 0 based on Foata normal form. 0/298 useless extension candidates. Maximal degree in co-relation 303. Up to 8 conditions per place. [2023-09-01 04:58:56,761 INFO L82 GeneralOperation]: Start removeDead. Operand has 308 places, 329 transitions, 679 flow [2023-09-01 04:58:56,770 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 308 places, 329 transitions, 679 flow [2023-09-01 04:58:56,770 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:58:56,770 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 308 places, 329 transitions, 679 flow [2023-09-01 04:58:56,771 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 308 places, 329 transitions, 679 flow [2023-09-01 04:58:56,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 308 places, 329 transitions, 679 flow [2023-09-01 04:58:56,841 INFO L130 PetriNetUnfolder]: 31/363 cut-off events. [2023-09-01 04:58:56,842 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 04:58:56,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 363 events. 31/363 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1085 event pairs, 0 based on Foata normal form. 0/298 useless extension candidates. Maximal degree in co-relation 303. Up to 8 conditions per place. [2023-09-01 04:58:56,867 INFO L119 LiptonReduction]: Number of co-enabled transitions 64602 [2023-09-01 04:59:03,145 INFO L134 LiptonReduction]: Checked pairs total: 172575 [2023-09-01 04:59:03,147 INFO L136 LiptonReduction]: Total number of compositions: 247 [2023-09-01 04:59:03,149 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 04:59:03,152 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@60b140b6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:59:03,153 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 04:59:03,160 INFO L130 PetriNetUnfolder]: 4/54 cut-off events. [2023-09-01 04:59:03,160 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 04:59:03,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:59:03,160 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-09-01 04:59:03,162 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 04:59:03,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:59:03,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1213916751, now seen corresponding path program 1 times [2023-09-01 04:59:03,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:59:03,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521018325] [2023-09-01 04:59:03,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:59:03,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:59:03,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:59:03,207 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 04:59:03,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:59:03,226 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 04:59:03,226 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 04:59:03,226 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 04:59:03,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 04:59:03,227 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 04:59:03,227 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 04:59:03,227 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 04:59:03,228 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-09-01 04:59:03,293 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 04:59:03,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 399 places, 427 transitions, 886 flow [2023-09-01 04:59:03,374 INFO L130 PetriNetUnfolder]: 41/473 cut-off events. [2023-09-01 04:59:03,374 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 04:59:03,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 473 events. 41/473 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1679 event pairs, 0 based on Foata normal form. 0/387 useless extension candidates. Maximal degree in co-relation 400. Up to 10 conditions per place. [2023-09-01 04:59:03,386 INFO L82 GeneralOperation]: Start removeDead. Operand has 399 places, 427 transitions, 886 flow [2023-09-01 04:59:03,392 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 399 places, 427 transitions, 886 flow [2023-09-01 04:59:03,392 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:59:03,392 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 399 places, 427 transitions, 886 flow [2023-09-01 04:59:03,393 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 399 places, 427 transitions, 886 flow [2023-09-01 04:59:03,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 399 places, 427 transitions, 886 flow [2023-09-01 04:59:03,477 INFO L130 PetriNetUnfolder]: 41/473 cut-off events. [2023-09-01 04:59:03,477 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 04:59:03,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 473 events. 41/473 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1679 event pairs, 0 based on Foata normal form. 0/387 useless extension candidates. Maximal degree in co-relation 400. Up to 10 conditions per place. [2023-09-01 04:59:03,508 INFO L119 LiptonReduction]: Number of co-enabled transitions 124160 [2023-09-01 04:59:11,957 INFO L134 LiptonReduction]: Checked pairs total: 353281 [2023-09-01 04:59:11,958 INFO L136 LiptonReduction]: Total number of compositions: 325 [2023-09-01 04:59:11,959 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 04:59:11,964 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@60b140b6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:59:11,969 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 04:59:11,982 INFO L130 PetriNetUnfolder]: 8/99 cut-off events. [2023-09-01 04:59:11,982 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 04:59:11,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:59:11,983 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-09-01 04:59:11,984 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 04:59:11,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:59:11,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1783804678, now seen corresponding path program 1 times [2023-09-01 04:59:11,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:59:11,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415911180] [2023-09-01 04:59:11,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:59:11,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:59:12,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:59:12,048 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 04:59:12,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:59:12,085 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 04:59:12,089 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 04:59:12,090 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 04:59:12,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 04:59:12,090 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 04:59:12,091 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 04:59:12,091 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 04:59:12,091 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-09-01 04:59:12,163 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 04:59:12,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 490 places, 525 transitions, 1095 flow [2023-09-01 04:59:12,304 INFO L130 PetriNetUnfolder]: 51/583 cut-off events. [2023-09-01 04:59:12,304 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 04:59:12,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 614 conditions, 583 events. 51/583 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2296 event pairs, 0 based on Foata normal form. 0/476 useless extension candidates. Maximal degree in co-relation 497. Up to 12 conditions per place. [2023-09-01 04:59:12,322 INFO L82 GeneralOperation]: Start removeDead. Operand has 490 places, 525 transitions, 1095 flow [2023-09-01 04:59:12,330 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 490 places, 525 transitions, 1095 flow [2023-09-01 04:59:12,330 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:59:12,330 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 490 places, 525 transitions, 1095 flow [2023-09-01 04:59:12,330 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 490 places, 525 transitions, 1095 flow [2023-09-01 04:59:12,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 490 places, 525 transitions, 1095 flow [2023-09-01 04:59:12,470 INFO L130 PetriNetUnfolder]: 51/583 cut-off events. [2023-09-01 04:59:12,471 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 04:59:12,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 614 conditions, 583 events. 51/583 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2296 event pairs, 0 based on Foata normal form. 0/476 useless extension candidates. Maximal degree in co-relation 497. Up to 12 conditions per place. [2023-09-01 04:59:12,612 INFO L119 LiptonReduction]: Number of co-enabled transitions 202730 [2023-09-01 04:59:22,863 INFO L134 LiptonReduction]: Checked pairs total: 577123 [2023-09-01 04:59:22,863 INFO L136 LiptonReduction]: Total number of compositions: 402 [2023-09-01 04:59:22,865 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 04:59:22,866 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@60b140b6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:59:22,866 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 04:59:22,883 INFO L130 PetriNetUnfolder]: 16/150 cut-off events. [2023-09-01 04:59:22,884 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 04:59:22,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:59:22,884 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:59:22,884 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 04:59:22,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:59:22,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1335391351, now seen corresponding path program 1 times [2023-09-01 04:59:22,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:59:22,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085944692] [2023-09-01 04:59:22,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:59:22,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:59:22,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:59:22,906 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 04:59:22,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:59:22,925 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 04:59:22,925 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 04:59:22,925 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 04:59:22,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 04:59:22,926 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 04:59:22,926 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 04:59:22,927 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 04:59:22,927 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-09-01 04:59:23,036 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 04:59:23,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 581 places, 623 transitions, 1306 flow [2023-09-01 04:59:23,238 INFO L130 PetriNetUnfolder]: 61/693 cut-off events. [2023-09-01 04:59:23,238 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 04:59:23,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 733 conditions, 693 events. 61/693 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2979 event pairs, 0 based on Foata normal form. 0/565 useless extension candidates. Maximal degree in co-relation 602. Up to 14 conditions per place. [2023-09-01 04:59:23,265 INFO L82 GeneralOperation]: Start removeDead. Operand has 581 places, 623 transitions, 1306 flow [2023-09-01 04:59:23,274 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 581 places, 623 transitions, 1306 flow [2023-09-01 04:59:23,275 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:59:23,275 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 581 places, 623 transitions, 1306 flow [2023-09-01 04:59:23,275 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 581 places, 623 transitions, 1306 flow [2023-09-01 04:59:23,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 581 places, 623 transitions, 1306 flow [2023-09-01 04:59:23,451 INFO L130 PetriNetUnfolder]: 61/693 cut-off events. [2023-09-01 04:59:23,451 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 04:59:23,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 733 conditions, 693 events. 61/693 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2979 event pairs, 0 based on Foata normal form. 0/565 useless extension candidates. Maximal degree in co-relation 602. Up to 14 conditions per place. [2023-09-01 04:59:23,521 INFO L119 LiptonReduction]: Number of co-enabled transitions 300312 [2023-09-01 04:59:35,463 INFO L134 LiptonReduction]: Checked pairs total: 873712 [2023-09-01 04:59:35,463 INFO L136 LiptonReduction]: Total number of compositions: 477 [2023-09-01 04:59:35,468 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 04:59:35,469 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@60b140b6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:59:35,469 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 04:59:35,489 INFO L130 PetriNetUnfolder]: 22/199 cut-off events. [2023-09-01 04:59:35,489 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 04:59:35,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:59:35,490 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:59:35,490 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 04:59:35,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:59:35,490 INFO L85 PathProgramCache]: Analyzing trace with hash -13033532, now seen corresponding path program 1 times [2023-09-01 04:59:35,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:59:35,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769381591] [2023-09-01 04:59:35,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:59:35,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:59:35,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:59:35,529 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 04:59:35,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:59:35,564 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 04:59:35,564 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 04:59:35,564 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 04:59:35,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 04:59:35,565 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 04:59:35,568 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 04:59:35,568 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 04:59:35,569 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-09-01 04:59:35,665 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 04:59:35,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 672 places, 721 transitions, 1519 flow [2023-09-01 04:59:35,929 INFO L130 PetriNetUnfolder]: 71/803 cut-off events. [2023-09-01 04:59:35,929 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-09-01 04:59:35,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 853 conditions, 803 events. 71/803 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3649 event pairs, 0 based on Foata normal form. 0/654 useless extension candidates. Maximal degree in co-relation 719. Up to 16 conditions per place. [2023-09-01 04:59:35,958 INFO L82 GeneralOperation]: Start removeDead. Operand has 672 places, 721 transitions, 1519 flow [2023-09-01 04:59:35,967 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 672 places, 721 transitions, 1519 flow [2023-09-01 04:59:35,967 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:59:35,968 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 672 places, 721 transitions, 1519 flow [2023-09-01 04:59:35,968 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 672 places, 721 transitions, 1519 flow [2023-09-01 04:59:35,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 672 places, 721 transitions, 1519 flow [2023-09-01 04:59:36,208 INFO L130 PetriNetUnfolder]: 71/803 cut-off events. [2023-09-01 04:59:36,208 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-09-01 04:59:36,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 853 conditions, 803 events. 71/803 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3649 event pairs, 0 based on Foata normal form. 0/654 useless extension candidates. Maximal degree in co-relation 719. Up to 16 conditions per place. [2023-09-01 04:59:36,308 INFO L119 LiptonReduction]: Number of co-enabled transitions 416906 [2023-09-01 04:59:49,712 INFO L134 LiptonReduction]: Checked pairs total: 1191750 [2023-09-01 04:59:49,713 INFO L136 LiptonReduction]: Total number of compositions: 550 [2023-09-01 04:59:49,715 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 04:59:49,717 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@60b140b6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 04:59:49,717 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 04:59:49,749 INFO L130 PetriNetUnfolder]: 30/250 cut-off events. [2023-09-01 04:59:49,749 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-09-01 04:59:49,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 04:59:49,749 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 04:59:49,750 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 04:59:49,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 04:59:49,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1927094219, now seen corresponding path program 1 times [2023-09-01 04:59:49,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 04:59:49,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342210507] [2023-09-01 04:59:49,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 04:59:49,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 04:59:49,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:59:49,787 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 04:59:49,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 04:59:49,818 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 04:59:49,819 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 04:59:49,819 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 04:59:49,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 04:59:49,819 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 04:59:49,820 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 04:59:49,820 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 04:59:49,820 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-09-01 04:59:49,915 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 04:59:49,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 763 places, 819 transitions, 1734 flow [2023-09-01 04:59:50,233 INFO L130 PetriNetUnfolder]: 81/913 cut-off events. [2023-09-01 04:59:50,233 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-09-01 04:59:50,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 974 conditions, 913 events. 81/913 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4325 event pairs, 0 based on Foata normal form. 0/743 useless extension candidates. Maximal degree in co-relation 837. Up to 18 conditions per place. [2023-09-01 04:59:50,270 INFO L82 GeneralOperation]: Start removeDead. Operand has 763 places, 819 transitions, 1734 flow [2023-09-01 04:59:50,281 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 763 places, 819 transitions, 1734 flow [2023-09-01 04:59:50,281 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 04:59:50,281 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 763 places, 819 transitions, 1734 flow [2023-09-01 04:59:50,282 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 763 places, 819 transitions, 1734 flow [2023-09-01 04:59:50,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 763 places, 819 transitions, 1734 flow [2023-09-01 04:59:50,576 INFO L130 PetriNetUnfolder]: 81/913 cut-off events. [2023-09-01 04:59:50,576 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-09-01 04:59:50,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 974 conditions, 913 events. 81/913 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4325 event pairs, 0 based on Foata normal form. 0/743 useless extension candidates. Maximal degree in co-relation 837. Up to 18 conditions per place. [2023-09-01 04:59:50,670 INFO L119 LiptonReduction]: Number of co-enabled transitions 552512 [2023-09-01 05:00:06,201 INFO L134 LiptonReduction]: Checked pairs total: 1608532 [2023-09-01 05:00:06,201 INFO L136 LiptonReduction]: Total number of compositions: 624 [2023-09-01 05:00:06,203 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:00:06,204 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@60b140b6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:00:06,204 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:00:06,268 INFO L130 PetriNetUnfolder]: 37/305 cut-off events. [2023-09-01 05:00:06,269 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-09-01 05:00:06,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:00:06,269 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:00:06,269 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:00:06,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:00:06,270 INFO L85 PathProgramCache]: Analyzing trace with hash 84623084, now seen corresponding path program 1 times [2023-09-01 05:00:06,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:00:06,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514419284] [2023-09-01 05:00:06,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:00:06,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:00:06,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:00:06,304 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:00:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:00:06,328 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:00:06,328 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:00:06,328 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:00:06,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 05:00:06,329 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:00:06,329 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:00:06,330 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:00:06,330 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-09-01 05:00:06,445 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:00:06,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 854 places, 917 transitions, 1951 flow [2023-09-01 05:00:06,788 INFO L130 PetriNetUnfolder]: 91/1023 cut-off events. [2023-09-01 05:00:06,788 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-09-01 05:00:06,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1096 conditions, 1023 events. 91/1023 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 5059 event pairs, 0 based on Foata normal form. 0/832 useless extension candidates. Maximal degree in co-relation 956. Up to 20 conditions per place. [2023-09-01 05:00:06,842 INFO L82 GeneralOperation]: Start removeDead. Operand has 854 places, 917 transitions, 1951 flow [2023-09-01 05:00:06,859 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 854 places, 917 transitions, 1951 flow [2023-09-01 05:00:06,859 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:00:06,860 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 854 places, 917 transitions, 1951 flow [2023-09-01 05:00:06,860 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 854 places, 917 transitions, 1951 flow [2023-09-01 05:00:06,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 854 places, 917 transitions, 1951 flow [2023-09-01 05:00:07,232 INFO L130 PetriNetUnfolder]: 91/1023 cut-off events. [2023-09-01 05:00:07,233 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-09-01 05:00:07,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1096 conditions, 1023 events. 91/1023 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 5059 event pairs, 0 based on Foata normal form. 0/832 useless extension candidates. Maximal degree in co-relation 956. Up to 20 conditions per place. [2023-09-01 05:00:07,414 INFO L119 LiptonReduction]: Number of co-enabled transitions 707130 [2023-09-01 05:00:24,996 INFO L134 LiptonReduction]: Checked pairs total: 2282311 [2023-09-01 05:00:24,996 INFO L136 LiptonReduction]: Total number of compositions: 704 [2023-09-01 05:00:24,997 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:00:24,998 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@60b140b6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:00:24,998 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:00:25,042 INFO L130 PetriNetUnfolder]: 44/351 cut-off events. [2023-09-01 05:00:25,043 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-09-01 05:00:25,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:00:25,043 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:00:25,043 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:00:25,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:00:25,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1043776736, now seen corresponding path program 1 times [2023-09-01 05:00:25,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:00:25,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912535033] [2023-09-01 05:00:25,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:00:25,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:00:25,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:00:25,072 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:00:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:00:25,101 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:00:25,102 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:00:25,102 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:00:25,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 05:00:25,102 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:00:25,105 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:00:25,105 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:00:25,105 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-09-01 05:00:25,230 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:00:25,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 945 places, 1015 transitions, 2170 flow [2023-09-01 05:00:25,675 INFO L130 PetriNetUnfolder]: 101/1133 cut-off events. [2023-09-01 05:00:25,675 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-09-01 05:00:25,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1219 conditions, 1133 events. 101/1133 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 5728 event pairs, 0 based on Foata normal form. 0/921 useless extension candidates. Maximal degree in co-relation 1076. Up to 22 conditions per place. [2023-09-01 05:00:25,730 INFO L82 GeneralOperation]: Start removeDead. Operand has 945 places, 1015 transitions, 2170 flow [2023-09-01 05:00:25,748 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 945 places, 1015 transitions, 2170 flow [2023-09-01 05:00:25,748 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:00:25,748 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 945 places, 1015 transitions, 2170 flow [2023-09-01 05:00:25,749 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 945 places, 1015 transitions, 2170 flow [2023-09-01 05:00:25,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 945 places, 1015 transitions, 2170 flow [2023-09-01 05:00:26,223 INFO L130 PetriNetUnfolder]: 101/1133 cut-off events. [2023-09-01 05:00:26,224 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-09-01 05:00:26,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1219 conditions, 1133 events. 101/1133 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 5728 event pairs, 0 based on Foata normal form. 0/921 useless extension candidates. Maximal degree in co-relation 1076. Up to 22 conditions per place. [2023-09-01 05:00:26,412 INFO L119 LiptonReduction]: Number of co-enabled transitions 880760 [2023-09-01 05:00:45,304 INFO L134 LiptonReduction]: Checked pairs total: 2566361 [2023-09-01 05:00:45,304 INFO L136 LiptonReduction]: Total number of compositions: 776 [2023-09-01 05:00:45,306 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:00:45,306 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@60b140b6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:00:45,306 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:00:45,369 INFO L130 PetriNetUnfolder]: 51/402 cut-off events. [2023-09-01 05:00:45,369 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-09-01 05:00:45,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:00:45,369 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:00:45,370 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:00:45,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:00:45,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1380839406, now seen corresponding path program 1 times [2023-09-01 05:00:45,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:00:45,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678289478] [2023-09-01 05:00:45,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:00:45,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:00:45,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:00:45,399 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:00:45,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:00:45,429 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:00:45,430 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:00:45,430 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:00:45,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 05:00:45,430 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:00:45,431 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:00:45,431 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:00:45,432 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-09-01 05:00:45,553 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:00:45,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1036 places, 1113 transitions, 2391 flow [2023-09-01 05:00:46,026 INFO L130 PetriNetUnfolder]: 111/1243 cut-off events. [2023-09-01 05:00:46,027 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-09-01 05:00:46,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1343 conditions, 1243 events. 111/1243 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 6400 event pairs, 0 based on Foata normal form. 0/1010 useless extension candidates. Maximal degree in co-relation 1199. Up to 24 conditions per place. [2023-09-01 05:00:46,076 INFO L82 GeneralOperation]: Start removeDead. Operand has 1036 places, 1113 transitions, 2391 flow [2023-09-01 05:00:46,089 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1036 places, 1113 transitions, 2391 flow [2023-09-01 05:00:46,090 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:00:46,090 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1036 places, 1113 transitions, 2391 flow [2023-09-01 05:00:46,090 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1036 places, 1113 transitions, 2391 flow [2023-09-01 05:00:46,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1036 places, 1113 transitions, 2391 flow [2023-09-01 05:00:46,508 INFO L130 PetriNetUnfolder]: 111/1243 cut-off events. [2023-09-01 05:00:46,508 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-09-01 05:00:46,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1343 conditions, 1243 events. 111/1243 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 6400 event pairs, 0 based on Foata normal form. 0/1010 useless extension candidates. Maximal degree in co-relation 1199. Up to 24 conditions per place. [2023-09-01 05:00:46,881 INFO L119 LiptonReduction]: Number of co-enabled transitions 1073402 [2023-09-01 05:01:09,833 INFO L134 LiptonReduction]: Checked pairs total: 3507382 [2023-09-01 05:01:09,833 INFO L136 LiptonReduction]: Total number of compositions: 849 [2023-09-01 05:01:09,834 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:01:09,835 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@60b140b6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:01:09,835 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:01:09,895 INFO L130 PetriNetUnfolder]: 58/455 cut-off events. [2023-09-01 05:01:09,895 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-09-01 05:01:09,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:01:09,895 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:01:09,896 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:01:09,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:01:09,896 INFO L85 PathProgramCache]: Analyzing trace with hash -361810310, now seen corresponding path program 1 times [2023-09-01 05:01:09,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:01:09,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597939044] [2023-09-01 05:01:09,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:01:09,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:01:09,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:01:09,941 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:01:09,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:01:09,972 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:01:09,973 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:01:09,973 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:01:09,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 05:01:09,973 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:01:09,974 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:01:09,974 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:01:09,974 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-09-01 05:01:10,115 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:01:10,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1127 places, 1211 transitions, 2614 flow [2023-09-01 05:01:10,732 INFO L130 PetriNetUnfolder]: 121/1353 cut-off events. [2023-09-01 05:01:10,733 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-09-01 05:01:10,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1468 conditions, 1353 events. 121/1353 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 7070 event pairs, 0 based on Foata normal form. 0/1099 useless extension candidates. Maximal degree in co-relation 1323. Up to 26 conditions per place. [2023-09-01 05:01:10,854 INFO L82 GeneralOperation]: Start removeDead. Operand has 1127 places, 1211 transitions, 2614 flow [2023-09-01 05:01:10,880 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1127 places, 1211 transitions, 2614 flow [2023-09-01 05:01:10,880 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:01:10,881 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1127 places, 1211 transitions, 2614 flow [2023-09-01 05:01:10,881 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1127 places, 1211 transitions, 2614 flow [2023-09-01 05:01:10,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1127 places, 1211 transitions, 2614 flow [2023-09-01 05:01:11,421 INFO L130 PetriNetUnfolder]: 121/1353 cut-off events. [2023-09-01 05:01:11,422 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-09-01 05:01:11,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1468 conditions, 1353 events. 121/1353 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 7070 event pairs, 0 based on Foata normal form. 0/1099 useless extension candidates. Maximal degree in co-relation 1323. Up to 26 conditions per place. [2023-09-01 05:01:11,691 INFO L119 LiptonReduction]: Number of co-enabled transitions 1285056 [2023-09-01 05:01:35,389 INFO L134 LiptonReduction]: Checked pairs total: 4170663 [2023-09-01 05:01:35,390 INFO L136 LiptonReduction]: Total number of compositions: 919 [2023-09-01 05:01:35,392 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:01:35,393 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@60b140b6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:01:35,393 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:01:35,506 INFO L130 PetriNetUnfolder]: 64/499 cut-off events. [2023-09-01 05:01:35,506 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-09-01 05:01:35,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:01:35,507 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:01:35,507 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:01:35,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:01:35,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1008849469, now seen corresponding path program 1 times [2023-09-01 05:01:35,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:01:35,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252829399] [2023-09-01 05:01:35,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:01:35,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:01:35,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:01:35,539 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:01:35,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:01:35,572 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:01:35,572 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:01:35,573 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:01:35,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 05:01:35,573 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:01:35,574 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:01:35,574 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:01:35,574 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-09-01 05:01:35,708 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:01:35,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1218 places, 1309 transitions, 2839 flow [2023-09-01 05:01:36,338 INFO L130 PetriNetUnfolder]: 131/1463 cut-off events. [2023-09-01 05:01:36,339 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-09-01 05:01:36,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1594 conditions, 1463 events. 131/1463 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 7779 event pairs, 0 based on Foata normal form. 0/1188 useless extension candidates. Maximal degree in co-relation 1448. Up to 28 conditions per place. [2023-09-01 05:01:36,446 INFO L82 GeneralOperation]: Start removeDead. Operand has 1218 places, 1309 transitions, 2839 flow [2023-09-01 05:01:36,471 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1218 places, 1309 transitions, 2839 flow [2023-09-01 05:01:36,471 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:01:36,471 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1218 places, 1309 transitions, 2839 flow [2023-09-01 05:01:36,471 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1218 places, 1309 transitions, 2839 flow [2023-09-01 05:01:36,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1218 places, 1309 transitions, 2839 flow [2023-09-01 05:01:37,071 INFO L130 PetriNetUnfolder]: 131/1463 cut-off events. [2023-09-01 05:01:37,071 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-09-01 05:01:37,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1594 conditions, 1463 events. 131/1463 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 7779 event pairs, 0 based on Foata normal form. 0/1188 useless extension candidates. Maximal degree in co-relation 1448. Up to 28 conditions per place. [2023-09-01 05:01:37,402 INFO L119 LiptonReduction]: Number of co-enabled transitions 1515722 [2023-09-01 05:02:02,434 INFO L134 LiptonReduction]: Checked pairs total: 4415961 [2023-09-01 05:02:02,434 INFO L136 LiptonReduction]: Total number of compositions: 980 [2023-09-01 05:02:02,436 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:02:02,436 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@60b140b6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:02:02,437 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:02:02,545 INFO L130 PetriNetUnfolder]: 72/553 cut-off events. [2023-09-01 05:02:02,545 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-09-01 05:02:02,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:02:02,545 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:02:02,545 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:02:02,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:02:02,546 INFO L85 PathProgramCache]: Analyzing trace with hash -357850694, now seen corresponding path program 1 times [2023-09-01 05:02:02,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:02:02,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218429886] [2023-09-01 05:02:02,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:02:02,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:02:02,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:02:02,575 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:02:02,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:02:02,605 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:02:02,606 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:02:02,606 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:02:02,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 05:02:02,606 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:02:02,607 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:02:02,607 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:02:02,607 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-09-01 05:02:02,772 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:02:02,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1309 places, 1407 transitions, 3066 flow [2023-09-01 05:02:03,492 INFO L130 PetriNetUnfolder]: 141/1573 cut-off events. [2023-09-01 05:02:03,492 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-09-01 05:02:03,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1721 conditions, 1573 events. 141/1573 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 8445 event pairs, 0 based on Foata normal form. 0/1277 useless extension candidates. Maximal degree in co-relation 1574. Up to 30 conditions per place. [2023-09-01 05:02:03,594 INFO L82 GeneralOperation]: Start removeDead. Operand has 1309 places, 1407 transitions, 3066 flow [2023-09-01 05:02:03,616 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1309 places, 1407 transitions, 3066 flow [2023-09-01 05:02:03,616 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:02:03,616 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1309 places, 1407 transitions, 3066 flow [2023-09-01 05:02:03,616 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1309 places, 1407 transitions, 3066 flow [2023-09-01 05:02:03,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1309 places, 1407 transitions, 3066 flow [2023-09-01 05:02:04,377 INFO L130 PetriNetUnfolder]: 141/1573 cut-off events. [2023-09-01 05:02:04,378 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-09-01 05:02:04,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1721 conditions, 1573 events. 141/1573 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 8445 event pairs, 0 based on Foata normal form. 0/1277 useless extension candidates. Maximal degree in co-relation 1574. Up to 30 conditions per place. [2023-09-01 05:02:04,722 INFO L119 LiptonReduction]: Number of co-enabled transitions 1765400 [2023-09-01 05:02:33,554 INFO L134 LiptonReduction]: Checked pairs total: 5183324 [2023-09-01 05:02:33,554 INFO L136 LiptonReduction]: Total number of compositions: 1068 [2023-09-01 05:02:33,556 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:02:33,556 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@60b140b6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:02:33,556 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:02:33,675 INFO L130 PetriNetUnfolder]: 78/608 cut-off events. [2023-09-01 05:02:33,675 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-09-01 05:02:33,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:02:33,676 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:02:33,676 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:02:33,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:02:33,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1878621585, now seen corresponding path program 1 times [2023-09-01 05:02:33,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:02:33,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961474784] [2023-09-01 05:02:33,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:02:33,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:02:33,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:02:33,707 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:02:33,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:02:33,739 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:02:33,739 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:02:33,739 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:02:33,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-09-01 05:02:33,740 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:02:33,740 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:02:33,740 WARN L233 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:02:33,740 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2023-09-01 05:02:33,919 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:02:33,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1400 places, 1505 transitions, 3295 flow [2023-09-01 05:02:34,868 INFO L130 PetriNetUnfolder]: 151/1683 cut-off events. [2023-09-01 05:02:34,869 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-09-01 05:02:34,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1849 conditions, 1683 events. 151/1683 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 9142 event pairs, 0 based on Foata normal form. 0/1366 useless extension candidates. Maximal degree in co-relation 1701. Up to 32 conditions per place. [2023-09-01 05:02:34,976 INFO L82 GeneralOperation]: Start removeDead. Operand has 1400 places, 1505 transitions, 3295 flow [2023-09-01 05:02:35,000 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1400 places, 1505 transitions, 3295 flow [2023-09-01 05:02:35,000 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:02:35,000 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1400 places, 1505 transitions, 3295 flow [2023-09-01 05:02:35,000 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1400 places, 1505 transitions, 3295 flow [2023-09-01 05:02:35,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1400 places, 1505 transitions, 3295 flow [2023-09-01 05:02:35,817 INFO L130 PetriNetUnfolder]: 151/1683 cut-off events. [2023-09-01 05:02:35,817 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-09-01 05:02:35,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1849 conditions, 1683 events. 151/1683 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 9142 event pairs, 0 based on Foata normal form. 0/1366 useless extension candidates. Maximal degree in co-relation 1701. Up to 32 conditions per place. [2023-09-01 05:02:36,238 INFO L119 LiptonReduction]: Number of co-enabled transitions 2034090 [2023-09-01 05:03:07,283 INFO L134 LiptonReduction]: Checked pairs total: 6592358 [2023-09-01 05:03:07,284 INFO L136 LiptonReduction]: Total number of compositions: 1137 [2023-09-01 05:03:07,286 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:03:07,287 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@60b140b6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:03:07,287 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:03:07,409 INFO L130 PetriNetUnfolder]: 85/652 cut-off events. [2023-09-01 05:03:07,409 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-09-01 05:03:07,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:03:07,410 INFO L208 CegarLoopForPetriNet]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:03:07,410 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:03:07,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:03:07,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1862721328, now seen corresponding path program 1 times [2023-09-01 05:03:07,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:03:07,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831190018] [2023-09-01 05:03:07,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:03:07,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:03:07,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:03:07,445 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:03:07,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:03:07,480 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:03:07,480 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:03:07,480 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:03:07,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-09-01 05:03:07,481 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:03:07,481 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:03:07,481 WARN L233 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:03:07,481 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2023-09-01 05:03:07,652 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:03:07,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1491 places, 1603 transitions, 3526 flow [2023-09-01 05:03:08,547 INFO L130 PetriNetUnfolder]: 161/1793 cut-off events. [2023-09-01 05:03:08,547 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-09-01 05:03:08,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1978 conditions, 1793 events. 161/1793 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 9844 event pairs, 0 based on Foata normal form. 0/1455 useless extension candidates. Maximal degree in co-relation 1829. Up to 34 conditions per place. [2023-09-01 05:03:08,714 INFO L82 GeneralOperation]: Start removeDead. Operand has 1491 places, 1603 transitions, 3526 flow [2023-09-01 05:03:08,754 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1491 places, 1603 transitions, 3526 flow [2023-09-01 05:03:08,754 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:03:08,754 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1491 places, 1603 transitions, 3526 flow [2023-09-01 05:03:08,754 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1491 places, 1603 transitions, 3526 flow [2023-09-01 05:03:08,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1491 places, 1603 transitions, 3526 flow [2023-09-01 05:03:09,703 INFO L130 PetriNetUnfolder]: 161/1793 cut-off events. [2023-09-01 05:03:09,703 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-09-01 05:03:09,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1978 conditions, 1793 events. 161/1793 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 9844 event pairs, 0 based on Foata normal form. 0/1455 useless extension candidates. Maximal degree in co-relation 1829. Up to 34 conditions per place. [2023-09-01 05:03:10,216 INFO L119 LiptonReduction]: Number of co-enabled transitions 2321792 [2023-09-01 05:03:42,889 INFO L134 LiptonReduction]: Checked pairs total: 7579547 [2023-09-01 05:03:42,889 INFO L136 LiptonReduction]: Total number of compositions: 1222 [2023-09-01 05:03:42,891 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:03:42,892 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@60b140b6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:03:42,892 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:03:43,049 INFO L130 PetriNetUnfolder]: 92/705 cut-off events. [2023-09-01 05:03:43,049 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-09-01 05:03:43,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:03:43,050 INFO L208 CegarLoopForPetriNet]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:03:43,050 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:03:43,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:03:43,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1636104487, now seen corresponding path program 1 times [2023-09-01 05:03:43,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:03:43,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040531338] [2023-09-01 05:03:43,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:03:43,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:03:43,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:03:43,096 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:03:43,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:03:43,134 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:03:43,134 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:03:43,135 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:03:43,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-09-01 05:03:43,135 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:03:43,135 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:03:43,135 WARN L233 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:03:43,136 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2023-09-01 05:03:43,332 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:03:43,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1582 places, 1701 transitions, 3759 flow [2023-09-01 05:03:44,482 INFO L130 PetriNetUnfolder]: 171/1903 cut-off events. [2023-09-01 05:03:44,482 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-09-01 05:03:44,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2108 conditions, 1903 events. 171/1903 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 10500 event pairs, 0 based on Foata normal form. 0/1544 useless extension candidates. Maximal degree in co-relation 1958. Up to 36 conditions per place. [2023-09-01 05:03:44,613 INFO L82 GeneralOperation]: Start removeDead. Operand has 1582 places, 1701 transitions, 3759 flow [2023-09-01 05:03:44,644 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1582 places, 1701 transitions, 3759 flow [2023-09-01 05:03:44,644 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:03:44,645 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1582 places, 1701 transitions, 3759 flow [2023-09-01 05:03:44,645 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1582 places, 1701 transitions, 3759 flow [2023-09-01 05:03:44,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1582 places, 1701 transitions, 3759 flow [2023-09-01 05:03:45,811 INFO L130 PetriNetUnfolder]: 171/1903 cut-off events. [2023-09-01 05:03:45,811 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-09-01 05:03:45,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2108 conditions, 1903 events. 171/1903 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 10500 event pairs, 0 based on Foata normal form. 0/1544 useless extension candidates. Maximal degree in co-relation 1958. Up to 36 conditions per place. [2023-09-01 05:03:46,349 INFO L119 LiptonReduction]: Number of co-enabled transitions 2628506 [2023-09-01 05:04:22,830 INFO L134 LiptonReduction]: Checked pairs total: 8522192 [2023-09-01 05:04:22,830 INFO L136 LiptonReduction]: Total number of compositions: 1282 [2023-09-01 05:04:22,832 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:04:22,833 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@60b140b6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:04:22,833 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:04:23,000 INFO L130 PetriNetUnfolder]: 100/762 cut-off events. [2023-09-01 05:04:23,000 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-09-01 05:04:23,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:04:23,000 INFO L208 CegarLoopForPetriNet]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:04:23,000 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:04:23,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:04:23,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1746100533, now seen corresponding path program 1 times [2023-09-01 05:04:23,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:04:23,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399924211] [2023-09-01 05:04:23,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:04:23,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:04:23,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:04:23,045 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:04:23,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:04:23,085 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:04:23,085 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:04:23,085 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:04:23,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-09-01 05:04:23,086 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:04:23,086 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:04:23,086 WARN L233 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:04:23,086 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2023-09-01 05:04:23,289 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:04:23,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1673 places, 1799 transitions, 3994 flow [2023-09-01 05:04:24,607 INFO L130 PetriNetUnfolder]: 181/2013 cut-off events. [2023-09-01 05:04:24,608 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-09-01 05:04:24,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2239 conditions, 2013 events. 181/2013 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 11209 event pairs, 0 based on Foata normal form. 0/1633 useless extension candidates. Maximal degree in co-relation 2088. Up to 38 conditions per place. [2023-09-01 05:04:24,748 INFO L82 GeneralOperation]: Start removeDead. Operand has 1673 places, 1799 transitions, 3994 flow [2023-09-01 05:04:24,780 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1673 places, 1799 transitions, 3994 flow [2023-09-01 05:04:24,780 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:04:24,780 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1673 places, 1799 transitions, 3994 flow [2023-09-01 05:04:24,780 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1673 places, 1799 transitions, 3994 flow [2023-09-01 05:04:24,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1673 places, 1799 transitions, 3994 flow [2023-09-01 05:04:26,048 INFO L130 PetriNetUnfolder]: 181/2013 cut-off events. [2023-09-01 05:04:26,048 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-09-01 05:04:26,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2239 conditions, 2013 events. 181/2013 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 11209 event pairs, 0 based on Foata normal form. 0/1633 useless extension candidates. Maximal degree in co-relation 2088. Up to 38 conditions per place. [2023-09-01 05:04:26,692 INFO L119 LiptonReduction]: Number of co-enabled transitions 2954232 [2023-09-01 05:05:04,053 INFO L134 LiptonReduction]: Checked pairs total: 8571900 [2023-09-01 05:05:04,054 INFO L136 LiptonReduction]: Total number of compositions: 1351 [2023-09-01 05:05:04,055 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:05:04,056 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@60b140b6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:05:04,056 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:05:04,277 INFO L130 PetriNetUnfolder]: 107/809 cut-off events. [2023-09-01 05:05:04,277 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-09-01 05:05:04,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:05:04,277 INFO L208 CegarLoopForPetriNet]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:05:04,277 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:05:04,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:05:04,278 INFO L85 PathProgramCache]: Analyzing trace with hash 596187427, now seen corresponding path program 1 times [2023-09-01 05:05:04,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:05:04,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890257479] [2023-09-01 05:05:04,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:05:04,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:05:04,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:05:04,324 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:05:04,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:05:04,366 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:05:04,368 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:05:04,368 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:05:04,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-09-01 05:05:04,368 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:05:04,369 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:05:04,369 WARN L233 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:05:04,369 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2023-09-01 05:05:04,565 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:05:04,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1764 places, 1897 transitions, 4231 flow [2023-09-01 05:05:06,123 INFO L130 PetriNetUnfolder]: 191/2123 cut-off events. [2023-09-01 05:05:06,123 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-09-01 05:05:06,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2371 conditions, 2123 events. 191/2123 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 11858 event pairs, 0 based on Foata normal form. 0/1722 useless extension candidates. Maximal degree in co-relation 2219. Up to 40 conditions per place. [2023-09-01 05:05:06,456 INFO L82 GeneralOperation]: Start removeDead. Operand has 1764 places, 1897 transitions, 4231 flow [2023-09-01 05:05:06,487 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1764 places, 1897 transitions, 4231 flow [2023-09-01 05:05:06,487 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:05:06,487 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1764 places, 1897 transitions, 4231 flow [2023-09-01 05:05:06,487 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1764 places, 1897 transitions, 4231 flow [2023-09-01 05:05:06,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1764 places, 1897 transitions, 4231 flow [2023-09-01 05:05:08,073 INFO L130 PetriNetUnfolder]: 191/2123 cut-off events. [2023-09-01 05:05:08,074 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-09-01 05:05:08,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2371 conditions, 2123 events. 191/2123 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 11858 event pairs, 0 based on Foata normal form. 0/1722 useless extension candidates. Maximal degree in co-relation 2219. Up to 40 conditions per place. [2023-09-01 05:05:09,202 INFO L119 LiptonReduction]: Number of co-enabled transitions 3298970 [2023-09-01 05:05:48,393 INFO L134 LiptonReduction]: Checked pairs total: 9540040 [2023-09-01 05:05:48,393 INFO L136 LiptonReduction]: Total number of compositions: 1435 [2023-09-01 05:05:48,395 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:05:48,396 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@60b140b6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:05:48,396 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:05:48,637 INFO L130 PetriNetUnfolder]: 114/856 cut-off events. [2023-09-01 05:05:48,637 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-09-01 05:05:48,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:05:48,638 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:05:48,638 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:05:48,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:05:48,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1028835156, now seen corresponding path program 1 times [2023-09-01 05:05:48,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:05:48,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555876883] [2023-09-01 05:05:48,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:05:48,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:05:48,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:05:48,688 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:05:48,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:05:48,734 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:05:48,734 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:05:48,735 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:05:48,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-09-01 05:05:48,735 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:05:48,735 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:05:48,735 WARN L233 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:05:48,736 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2023-09-01 05:05:48,969 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:05:48,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1855 places, 1995 transitions, 4470 flow [2023-09-01 05:05:50,862 INFO L130 PetriNetUnfolder]: 201/2233 cut-off events. [2023-09-01 05:05:50,863 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-09-01 05:05:51,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2504 conditions, 2233 events. 201/2233 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 12565 event pairs, 0 based on Foata normal form. 0/1811 useless extension candidates. Maximal degree in co-relation 2351. Up to 42 conditions per place. [2023-09-01 05:05:51,050 INFO L82 GeneralOperation]: Start removeDead. Operand has 1855 places, 1995 transitions, 4470 flow [2023-09-01 05:05:51,163 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1855 places, 1995 transitions, 4470 flow [2023-09-01 05:05:51,163 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:05:51,163 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1855 places, 1995 transitions, 4470 flow [2023-09-01 05:05:51,164 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1855 places, 1995 transitions, 4470 flow [2023-09-01 05:05:51,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1855 places, 1995 transitions, 4470 flow [2023-09-01 05:05:52,771 INFO L130 PetriNetUnfolder]: 201/2233 cut-off events. [2023-09-01 05:05:52,771 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-09-01 05:05:52,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2504 conditions, 2233 events. 201/2233 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 12565 event pairs, 0 based on Foata normal form. 0/1811 useless extension candidates. Maximal degree in co-relation 2351. Up to 42 conditions per place. [2023-09-01 05:05:53,625 INFO L119 LiptonReduction]: Number of co-enabled transitions 3662720 [2023-09-01 05:06:35,878 INFO L134 LiptonReduction]: Checked pairs total: 11839149 [2023-09-01 05:06:35,879 INFO L136 LiptonReduction]: Total number of compositions: 1520 [2023-09-01 05:06:35,881 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:06:35,881 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@60b140b6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:06:35,881 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:06:36,162 INFO L130 PetriNetUnfolder]: 120/906 cut-off events. [2023-09-01 05:06:36,162 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-09-01 05:06:36,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:06:36,162 INFO L208 CegarLoopForPetriNet]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:06:36,162 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:06:36,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:06:36,163 INFO L85 PathProgramCache]: Analyzing trace with hash -2093940908, now seen corresponding path program 1 times [2023-09-01 05:06:36,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:06:36,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907771508] [2023-09-01 05:06:36,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:06:36,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:06:36,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:06:36,205 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:06:36,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:06:36,252 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:06:36,253 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:06:36,253 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:06:36,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-09-01 05:06:36,253 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:06:36,254 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:06:36,254 WARN L233 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:06:36,254 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2023-09-01 05:06:36,454 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:06:36,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1946 places, 2093 transitions, 4711 flow [2023-09-01 05:06:38,334 INFO L130 PetriNetUnfolder]: 211/2343 cut-off events. [2023-09-01 05:06:38,334 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-09-01 05:06:38,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2638 conditions, 2343 events. 211/2343 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 13237 event pairs, 0 based on Foata normal form. 0/1900 useless extension candidates. Maximal degree in co-relation 2484. Up to 44 conditions per place. [2023-09-01 05:06:38,520 INFO L82 GeneralOperation]: Start removeDead. Operand has 1946 places, 2093 transitions, 4711 flow [2023-09-01 05:06:38,561 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1946 places, 2093 transitions, 4711 flow [2023-09-01 05:06:38,561 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:06:38,561 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1946 places, 2093 transitions, 4711 flow [2023-09-01 05:06:38,561 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1946 places, 2093 transitions, 4711 flow [2023-09-01 05:06:38,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1946 places, 2093 transitions, 4711 flow [2023-09-01 05:06:40,260 INFO L130 PetriNetUnfolder]: 211/2343 cut-off events. [2023-09-01 05:06:40,260 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-09-01 05:06:40,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2638 conditions, 2343 events. 211/2343 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 13237 event pairs, 0 based on Foata normal form. 0/1900 useless extension candidates. Maximal degree in co-relation 2484. Up to 44 conditions per place. [2023-09-01 05:06:41,255 INFO L119 LiptonReduction]: Number of co-enabled transitions 4045482 [2023-09-01 05:07:26,123 INFO L134 LiptonReduction]: Checked pairs total: 13079904 [2023-09-01 05:07:26,123 INFO L136 LiptonReduction]: Total number of compositions: 1577 [2023-09-01 05:07:26,125 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:07:26,125 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@60b140b6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:07:26,125 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:07:26,398 INFO L130 PetriNetUnfolder]: 128/961 cut-off events. [2023-09-01 05:07:26,398 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-09-01 05:07:26,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:07:26,399 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:07:26,399 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:07:26,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:07:26,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1413707704, now seen corresponding path program 1 times [2023-09-01 05:07:26,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:07:26,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302203625] [2023-09-01 05:07:26,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:07:26,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:07:26,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:07:26,447 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:07:26,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:07:26,503 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:07:26,503 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:07:26,503 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:07:26,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-09-01 05:07:26,503 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:07:26,504 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:07:26,504 WARN L233 ceAbstractionStarter]: 21 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:07:26,504 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 22 thread instances. [2023-09-01 05:07:26,740 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:07:26,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2037 places, 2191 transitions, 4954 flow [2023-09-01 05:07:28,888 INFO L130 PetriNetUnfolder]: 221/2453 cut-off events. [2023-09-01 05:07:28,888 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-09-01 05:07:29,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2773 conditions, 2453 events. 221/2453 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 13918 event pairs, 0 based on Foata normal form. 0/1989 useless extension candidates. Maximal degree in co-relation 2618. Up to 46 conditions per place. [2023-09-01 05:07:29,085 INFO L82 GeneralOperation]: Start removeDead. Operand has 2037 places, 2191 transitions, 4954 flow [2023-09-01 05:07:29,216 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2037 places, 2191 transitions, 4954 flow [2023-09-01 05:07:29,216 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:07:29,216 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2037 places, 2191 transitions, 4954 flow [2023-09-01 05:07:29,217 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2037 places, 2191 transitions, 4954 flow [2023-09-01 05:07:29,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2037 places, 2191 transitions, 4954 flow [2023-09-01 05:07:31,831 INFO L130 PetriNetUnfolder]: 221/2453 cut-off events. [2023-09-01 05:07:31,831 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-09-01 05:07:32,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2773 conditions, 2453 events. 221/2453 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 13918 event pairs, 0 based on Foata normal form. 0/1989 useless extension candidates. Maximal degree in co-relation 2618. Up to 46 conditions per place. [2023-09-01 05:07:32,940 INFO L119 LiptonReduction]: Number of co-enabled transitions 4447256 [2023-09-01 05:08:18,622 INFO L134 LiptonReduction]: Checked pairs total: 14441192 [2023-09-01 05:08:18,622 INFO L136 LiptonReduction]: Total number of compositions: 1659 [2023-09-01 05:08:18,624 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:08:18,624 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@60b140b6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:08:18,624 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:08:18,944 INFO L130 PetriNetUnfolder]: 135/1007 cut-off events. [2023-09-01 05:08:18,944 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-09-01 05:08:18,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:08:18,944 INFO L208 CegarLoopForPetriNet]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:08:18,944 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:08:18,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:08:18,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1769364969, now seen corresponding path program 1 times [2023-09-01 05:08:18,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:08:18,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868037277] [2023-09-01 05:08:18,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:08:18,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:08:18,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:08:19,000 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:08:19,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:08:19,052 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:08:19,052 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:08:19,052 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:08:19,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-09-01 05:08:19,053 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:08:19,053 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:08:19,053 WARN L233 ceAbstractionStarter]: 22 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:08:19,054 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 23 thread instances. [2023-09-01 05:08:19,294 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:08:19,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2128 places, 2289 transitions, 5199 flow [2023-09-01 05:08:21,579 INFO L130 PetriNetUnfolder]: 231/2563 cut-off events. [2023-09-01 05:08:21,580 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-09-01 05:08:21,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2909 conditions, 2563 events. 231/2563 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 14576 event pairs, 0 based on Foata normal form. 0/2078 useless extension candidates. Maximal degree in co-relation 2753. Up to 48 conditions per place. [2023-09-01 05:08:21,787 INFO L82 GeneralOperation]: Start removeDead. Operand has 2128 places, 2289 transitions, 5199 flow [2023-09-01 05:08:21,829 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2128 places, 2289 transitions, 5199 flow [2023-09-01 05:08:21,829 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:08:21,829 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2128 places, 2289 transitions, 5199 flow [2023-09-01 05:08:21,830 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2128 places, 2289 transitions, 5199 flow [2023-09-01 05:08:21,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2128 places, 2289 transitions, 5199 flow [2023-09-01 05:08:24,083 INFO L130 PetriNetUnfolder]: 231/2563 cut-off events. [2023-09-01 05:08:24,083 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-09-01 05:08:24,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2909 conditions, 2563 events. 231/2563 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 14576 event pairs, 0 based on Foata normal form. 0/2078 useless extension candidates. Maximal degree in co-relation 2753. Up to 48 conditions per place. [2023-09-01 05:08:25,245 INFO L119 LiptonReduction]: Number of co-enabled transitions 4868042 [2023-09-01 05:09:12,834 INFO L134 LiptonReduction]: Checked pairs total: 15654079 [2023-09-01 05:09:12,834 INFO L136 LiptonReduction]: Total number of compositions: 1731 [2023-09-01 05:09:12,836 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 05:09:12,836 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@60b140b6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 05:09:12,836 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 05:09:13,226 INFO L130 PetriNetUnfolder]: 141/1057 cut-off events. [2023-09-01 05:09:13,227 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-09-01 05:09:13,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 05:09:13,227 INFO L208 CegarLoopForPetriNet]: trace histogram [24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 05:09:13,227 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 05:09:13,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 05:09:13,227 INFO L85 PathProgramCache]: Analyzing trace with hash -186076379, now seen corresponding path program 1 times [2023-09-01 05:09:13,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 05:09:13,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636225549] [2023-09-01 05:09:13,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 05:09:13,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 05:09:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:09:13,284 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 05:09:13,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 05:09:13,334 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 05:09:13,335 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 05:09:13,335 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 05:09:13,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-09-01 05:09:13,335 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 05:09:13,336 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 05:09:13,336 WARN L233 ceAbstractionStarter]: 23 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 05:09:13,336 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 24 thread instances. [2023-09-01 05:09:13,603 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 05:09:13,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2219 places, 2387 transitions, 5446 flow [2023-09-01 05:09:16,268 INFO L130 PetriNetUnfolder]: 241/2673 cut-off events. [2023-09-01 05:09:16,268 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-09-01 05:09:16,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3046 conditions, 2673 events. 241/2673 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 15285 event pairs, 0 based on Foata normal form. 0/2167 useless extension candidates. Maximal degree in co-relation 2889. Up to 50 conditions per place. [2023-09-01 05:09:16,497 INFO L82 GeneralOperation]: Start removeDead. Operand has 2219 places, 2387 transitions, 5446 flow [2023-09-01 05:09:16,543 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2219 places, 2387 transitions, 5446 flow [2023-09-01 05:09:16,544 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 05:09:16,544 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2219 places, 2387 transitions, 5446 flow [2023-09-01 05:09:16,544 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2219 places, 2387 transitions, 5446 flow [2023-09-01 05:09:16,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2219 places, 2387 transitions, 5446 flow [2023-09-01 05:09:18,964 INFO L130 PetriNetUnfolder]: 241/2673 cut-off events. [2023-09-01 05:09:18,964 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-09-01 05:09:19,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3046 conditions, 2673 events. 241/2673 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 15285 event pairs, 0 based on Foata normal form. 0/2167 useless extension candidates. Maximal degree in co-relation 2889. Up to 50 conditions per place. [2023-09-01 05:09:20,259 INFO L119 LiptonReduction]: Number of co-enabled transitions 5307840 Killed by 15