./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-1.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e12b29ddb474fc17e74c2b71eb245022640b1de10fdbbb130c7f22e13cd3653f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 09:15:58,790 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 09:15:58,793 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 09:15:58,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 09:15:58,831 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 09:15:58,834 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 09:15:58,836 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 09:15:58,838 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 09:15:58,840 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 09:15:58,845 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 09:15:58,845 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 09:15:58,848 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 09:15:58,848 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 09:15:58,851 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 09:15:58,852 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 09:15:58,858 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 09:15:58,859 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 09:15:58,860 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 09:15:58,862 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 09:15:58,865 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 09:15:58,868 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 09:15:58,869 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 09:15:58,870 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 09:15:58,871 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 09:15:58,877 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 09:15:58,877 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 09:15:58,877 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 09:15:58,879 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 09:15:58,879 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 09:15:58,880 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 09:15:58,881 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 09:15:58,885 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 09:15:58,887 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 09:15:58,888 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 09:15:58,888 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 09:15:58,889 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 09:15:58,890 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 09:15:58,890 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 09:15:58,890 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 09:15:58,891 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 09:15:58,891 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 09:15:58,893 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 09:15:58,932 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 09:15:58,932 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 09:15:58,933 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 09:15:58,933 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 09:15:58,934 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 09:15:58,934 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 09:15:58,935 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 09:15:58,935 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 09:15:58,935 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 09:15:58,935 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 09:15:58,936 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 09:15:58,936 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 09:15:58,936 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 09:15:58,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 09:15:58,937 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 09:15:58,937 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 09:15:58,937 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 09:15:58,937 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 09:15:58,937 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 09:15:58,938 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 09:15:58,938 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 09:15:58,938 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 09:15:58,938 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 09:15:58,938 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 09:15:58,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 09:15:58,939 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 09:15:58,939 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 09:15:58,939 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 09:15:58,939 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 09:15:58,939 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 09:15:58,940 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 09:15:58,940 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 09:15:58,940 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 09:15:58,940 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 09:15:58,940 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 09:15:58,941 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e12b29ddb474fc17e74c2b71eb245022640b1de10fdbbb130c7f22e13cd3653f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 09:15:59,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 09:15:59,252 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 09:15:59,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 09:15:59,255 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 09:15:59,255 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 09:15:59,256 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-1.i [2023-09-01 09:16:00,406 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 09:16:00,705 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 09:16:00,706 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-1.i [2023-09-01 09:16:00,719 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/042ac4644/f12c069a6ffb4c6d937f3336546a286e/FLAGa9e194ff8 [2023-09-01 09:16:00,745 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/042ac4644/f12c069a6ffb4c6d937f3336546a286e [2023-09-01 09:16:00,748 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 09:16:00,749 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 09:16:00,751 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 09:16:00,751 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 09:16:00,754 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 09:16:00,754 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 09:16:00" (1/1) ... [2023-09-01 09:16:00,755 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dc13f90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:16:00, skipping insertion in model container [2023-09-01 09:16:00,755 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 09:16:00" (1/1) ... [2023-09-01 09:16:00,762 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 09:16:00,806 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 09:16:01,101 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-1.i[31166,31179] [2023-09-01 09:16:01,111 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 09:16:01,122 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 09:16:01,163 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-1.i[31166,31179] [2023-09-01 09:16:01,166 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 09:16:01,203 INFO L208 MainTranslator]: Completed translation [2023-09-01 09:16:01,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:16:01 WrapperNode [2023-09-01 09:16:01,203 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 09:16:01,204 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 09:16:01,205 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 09:16:01,205 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 09:16:01,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:16:01" (1/1) ... [2023-09-01 09:16:01,225 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:16:01" (1/1) ... [2023-09-01 09:16:01,256 INFO L138 Inliner]: procedures = 177, calls = 47, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 188 [2023-09-01 09:16:01,256 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 09:16:01,257 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 09:16:01,257 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 09:16:01,257 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 09:16:01,264 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:16:01" (1/1) ... [2023-09-01 09:16:01,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:16:01" (1/1) ... [2023-09-01 09:16:01,278 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:16:01" (1/1) ... [2023-09-01 09:16:01,278 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:16:01" (1/1) ... [2023-09-01 09:16:01,284 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:16:01" (1/1) ... [2023-09-01 09:16:01,287 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:16:01" (1/1) ... [2023-09-01 09:16:01,289 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:16:01" (1/1) ... [2023-09-01 09:16:01,290 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:16:01" (1/1) ... [2023-09-01 09:16:01,293 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 09:16:01,294 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 09:16:01,294 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 09:16:01,294 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 09:16:01,309 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:16:01" (1/1) ... [2023-09-01 09:16:01,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 09:16:01,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:16:01,340 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 09:16:01,353 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 09:16:01,369 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 09:16:01,369 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-09-01 09:16:01,369 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-09-01 09:16:01,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 09:16:01,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 09:16:01,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 09:16:01,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 09:16:01,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 09:16:01,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 09:16:01,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 09:16:01,371 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 09:16:01,532 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 09:16:01,534 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 09:16:01,899 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 09:16:02,047 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 09:16:02,048 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 09:16:02,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 09:16:02 BoogieIcfgContainer [2023-09-01 09:16:02,050 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 09:16:02,052 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 09:16:02,053 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 09:16:02,055 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 09:16:02,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 09:16:00" (1/3) ... [2023-09-01 09:16:02,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e184a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 09:16:02, skipping insertion in model container [2023-09-01 09:16:02,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:16:01" (2/3) ... [2023-09-01 09:16:02,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e184a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 09:16:02, skipping insertion in model container [2023-09-01 09:16:02,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 09:16:02" (3/3) ... [2023-09-01 09:16:02,059 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longer-1.i [2023-09-01 09:16:02,067 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 09:16:02,075 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 09:16:02,075 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 09:16:02,075 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 09:16:02,167 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:16:02,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 114 transitions, 233 flow [2023-09-01 09:16:02,273 INFO L130 PetriNetUnfolder]: 11/124 cut-off events. [2023-09-01 09:16:02,273 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 09:16:02,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 124 events. 11/124 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 90. Up to 4 conditions per place. [2023-09-01 09:16:02,279 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 114 transitions, 233 flow [2023-09-01 09:16:02,285 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 114 transitions, 233 flow [2023-09-01 09:16:02,288 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:16:02,303 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 114 transitions, 233 flow [2023-09-01 09:16:02,305 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 114 transitions, 233 flow [2023-09-01 09:16:02,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 114 transitions, 233 flow [2023-09-01 09:16:02,347 INFO L130 PetriNetUnfolder]: 11/124 cut-off events. [2023-09-01 09:16:02,349 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 09:16:02,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 124 events. 11/124 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 90. Up to 4 conditions per place. [2023-09-01 09:16:02,354 INFO L119 LiptonReduction]: Number of co-enabled transitions 2028 [2023-09-01 09:16:06,021 INFO L134 LiptonReduction]: Checked pairs total: 2167 [2023-09-01 09:16:06,021 INFO L136 LiptonReduction]: Total number of compositions: 104 [2023-09-01 09:16:06,033 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:16:06,038 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;@54bedb48, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:16:06,039 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:16:06,043 INFO L130 PetriNetUnfolder]: 2/13 cut-off events. [2023-09-01 09:16:06,043 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 09:16:06,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:16:06,044 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-09-01 09:16:06,045 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:16:06,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:16:06,049 INFO L85 PathProgramCache]: Analyzing trace with hash 174361225, now seen corresponding path program 1 times [2023-09-01 09:16:06,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:16:06,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121032825] [2023-09-01 09:16:06,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:16:06,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:16:06,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:16:06,157 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:16:06,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:16:06,201 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:16:06,203 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:16:06,204 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:16:06,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 09:16:06,206 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:16:06,212 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:16:06,213 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:16:06,213 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 09:16:06,282 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:16:06,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 193 transitions, 398 flow [2023-09-01 09:16:06,336 INFO L130 PetriNetUnfolder]: 21/215 cut-off events. [2023-09-01 09:16:06,336 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 09:16:06,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 215 events. 21/215 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 410 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 168. Up to 6 conditions per place. [2023-09-01 09:16:06,339 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 193 transitions, 398 flow [2023-09-01 09:16:06,341 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 193 transitions, 398 flow [2023-09-01 09:16:06,342 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:16:06,342 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 193 transitions, 398 flow [2023-09-01 09:16:06,342 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 193 transitions, 398 flow [2023-09-01 09:16:06,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 193 transitions, 398 flow [2023-09-01 09:16:06,382 INFO L130 PetriNetUnfolder]: 21/215 cut-off events. [2023-09-01 09:16:06,383 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 09:16:06,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 215 events. 21/215 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 410 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 168. Up to 6 conditions per place. [2023-09-01 09:16:06,392 INFO L119 LiptonReduction]: Number of co-enabled transitions 16380 [2023-09-01 09:16:11,046 INFO L134 LiptonReduction]: Checked pairs total: 33585 [2023-09-01 09:16:11,046 INFO L136 LiptonReduction]: Total number of compositions: 155 [2023-09-01 09:16:11,049 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:16:11,050 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;@54bedb48, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:16:11,050 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:16:11,054 INFO L130 PetriNetUnfolder]: 3/31 cut-off events. [2023-09-01 09:16:11,054 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 09:16:11,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:16:11,055 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-09-01 09:16:11,055 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:16:11,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:16:11,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1971217253, now seen corresponding path program 1 times [2023-09-01 09:16:11,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:16:11,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379767597] [2023-09-01 09:16:11,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:16:11,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:16:11,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:16:11,079 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:16:11,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:16:11,097 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:16:11,097 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:16:11,097 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:16:11,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 09:16:11,098 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:16:11,098 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:16:11,099 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:16:11,099 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-09-01 09:16:11,156 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:16:11,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 272 transitions, 565 flow [2023-09-01 09:16:11,206 INFO L130 PetriNetUnfolder]: 31/306 cut-off events. [2023-09-01 09:16:11,207 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 09:16:11,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 306 events. 31/306 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 814 event pairs, 0 based on Foata normal form. 0/268 useless extension candidates. Maximal degree in co-relation 246. Up to 8 conditions per place. [2023-09-01 09:16:11,211 INFO L82 GeneralOperation]: Start removeDead. Operand has 251 places, 272 transitions, 565 flow [2023-09-01 09:16:11,213 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 251 places, 272 transitions, 565 flow [2023-09-01 09:16:11,214 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:16:11,214 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 251 places, 272 transitions, 565 flow [2023-09-01 09:16:11,214 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 251 places, 272 transitions, 565 flow [2023-09-01 09:16:11,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 272 transitions, 565 flow [2023-09-01 09:16:11,250 INFO L130 PetriNetUnfolder]: 31/306 cut-off events. [2023-09-01 09:16:11,251 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 09:16:11,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 306 events. 31/306 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 814 event pairs, 0 based on Foata normal form. 0/268 useless extension candidates. Maximal degree in co-relation 246. Up to 8 conditions per place. [2023-09-01 09:16:11,271 INFO L119 LiptonReduction]: Number of co-enabled transitions 43056 [2023-09-01 09:16:17,179 INFO L134 LiptonReduction]: Checked pairs total: 78907 [2023-09-01 09:16:17,179 INFO L136 LiptonReduction]: Total number of compositions: 218 [2023-09-01 09:16:17,181 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:16:17,184 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;@54bedb48, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:16:17,185 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:16:17,190 INFO L130 PetriNetUnfolder]: 7/58 cut-off events. [2023-09-01 09:16:17,190 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 09:16:17,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:16:17,190 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-09-01 09:16:17,190 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:16:17,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:16:17,191 INFO L85 PathProgramCache]: Analyzing trace with hash -271960691, now seen corresponding path program 1 times [2023-09-01 09:16:17,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:16:17,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71530246] [2023-09-01 09:16:17,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:16:17,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:16:17,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:16:17,212 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:16:17,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:16:17,233 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:16:17,233 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:16:17,234 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:16:17,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 09:16:17,234 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:16:17,235 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:16:17,235 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:16:17,235 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-09-01 09:16:17,300 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:16:17,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 323 places, 351 transitions, 734 flow [2023-09-01 09:16:17,383 INFO L130 PetriNetUnfolder]: 41/397 cut-off events. [2023-09-01 09:16:17,383 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 09:16:17,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 397 events. 41/397 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1280 event pairs, 0 based on Foata normal form. 0/347 useless extension candidates. Maximal degree in co-relation 324. Up to 10 conditions per place. [2023-09-01 09:16:17,387 INFO L82 GeneralOperation]: Start removeDead. Operand has 323 places, 351 transitions, 734 flow [2023-09-01 09:16:17,391 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 323 places, 351 transitions, 734 flow [2023-09-01 09:16:17,391 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:16:17,391 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 323 places, 351 transitions, 734 flow [2023-09-01 09:16:17,391 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 323 places, 351 transitions, 734 flow [2023-09-01 09:16:17,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 323 places, 351 transitions, 734 flow [2023-09-01 09:16:17,443 INFO L130 PetriNetUnfolder]: 41/397 cut-off events. [2023-09-01 09:16:17,444 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 09:16:17,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 397 events. 41/397 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1280 event pairs, 0 based on Foata normal form. 0/347 useless extension candidates. Maximal degree in co-relation 324. Up to 10 conditions per place. [2023-09-01 09:16:17,463 INFO L119 LiptonReduction]: Number of co-enabled transitions 82056 [2023-09-01 09:16:24,593 INFO L134 LiptonReduction]: Checked pairs total: 163123 [2023-09-01 09:16:24,593 INFO L136 LiptonReduction]: Total number of compositions: 282 [2023-09-01 09:16:24,595 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:16:24,596 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;@54bedb48, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:16:24,596 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:16:24,605 INFO L130 PetriNetUnfolder]: 14/94 cut-off events. [2023-09-01 09:16:24,605 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 09:16:24,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:16:24,605 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-09-01 09:16:24,606 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:16:24,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:16:24,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1535314522, now seen corresponding path program 1 times [2023-09-01 09:16:24,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:16:24,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418537971] [2023-09-01 09:16:24,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:16:24,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:16:24,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:16:24,643 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:16:24,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:16:24,683 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:16:24,687 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:16:24,687 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:16:24,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 09:16:24,688 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:16:24,688 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:16:24,688 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:16:24,688 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-09-01 09:16:24,762 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:16:24,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 395 places, 430 transitions, 905 flow [2023-09-01 09:16:24,847 INFO L130 PetriNetUnfolder]: 51/488 cut-off events. [2023-09-01 09:16:24,848 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 09:16:24,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 488 events. 51/488 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1751 event pairs, 0 based on Foata normal form. 0/426 useless extension candidates. Maximal degree in co-relation 410. Up to 12 conditions per place. [2023-09-01 09:16:24,854 INFO L82 GeneralOperation]: Start removeDead. Operand has 395 places, 430 transitions, 905 flow [2023-09-01 09:16:24,860 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 395 places, 430 transitions, 905 flow [2023-09-01 09:16:24,860 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:16:24,860 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 395 places, 430 transitions, 905 flow [2023-09-01 09:16:24,860 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 395 places, 430 transitions, 905 flow [2023-09-01 09:16:24,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 395 places, 430 transitions, 905 flow [2023-09-01 09:16:24,961 INFO L130 PetriNetUnfolder]: 51/488 cut-off events. [2023-09-01 09:16:24,962 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 09:16:24,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 488 events. 51/488 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1751 event pairs, 0 based on Foata normal form. 0/426 useless extension candidates. Maximal degree in co-relation 410. Up to 12 conditions per place. [2023-09-01 09:16:24,993 INFO L119 LiptonReduction]: Number of co-enabled transitions 133380 [2023-09-01 09:16:33,761 INFO L134 LiptonReduction]: Checked pairs total: 266074 [2023-09-01 09:16:33,762 INFO L136 LiptonReduction]: Total number of compositions: 342 [2023-09-01 09:16:33,763 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:16:33,764 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;@54bedb48, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:16:33,764 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:16:33,777 INFO L130 PetriNetUnfolder]: 22/128 cut-off events. [2023-09-01 09:16:33,778 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 09:16:33,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:16:33,778 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:16:33,778 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:16:33,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:16:33,779 INFO L85 PathProgramCache]: Analyzing trace with hash -821437459, now seen corresponding path program 1 times [2023-09-01 09:16:33,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:16:33,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146539961] [2023-09-01 09:16:33,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:16:33,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:16:33,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:16:33,804 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:16:33,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:16:33,848 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:16:33,853 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:16:33,853 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:16:33,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 09:16:33,853 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:16:33,854 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:16:33,854 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:16:33,854 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-09-01 09:16:33,946 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:16:33,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 467 places, 509 transitions, 1078 flow [2023-09-01 09:16:34,066 INFO L130 PetriNetUnfolder]: 61/579 cut-off events. [2023-09-01 09:16:34,066 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 09:16:34,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 619 conditions, 579 events. 61/579 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2262 event pairs, 0 based on Foata normal form. 0/505 useless extension candidates. Maximal degree in co-relation 507. Up to 14 conditions per place. [2023-09-01 09:16:34,074 INFO L82 GeneralOperation]: Start removeDead. Operand has 467 places, 509 transitions, 1078 flow [2023-09-01 09:16:34,084 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 467 places, 509 transitions, 1078 flow [2023-09-01 09:16:34,084 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:16:34,084 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 467 places, 509 transitions, 1078 flow [2023-09-01 09:16:34,084 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 467 places, 509 transitions, 1078 flow [2023-09-01 09:16:34,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 467 places, 509 transitions, 1078 flow [2023-09-01 09:16:34,220 INFO L130 PetriNetUnfolder]: 61/579 cut-off events. [2023-09-01 09:16:34,220 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 09:16:34,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 619 conditions, 579 events. 61/579 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2262 event pairs, 0 based on Foata normal form. 0/505 useless extension candidates. Maximal degree in co-relation 507. Up to 14 conditions per place. [2023-09-01 09:16:34,269 INFO L119 LiptonReduction]: Number of co-enabled transitions 197028 [2023-09-01 09:16:44,425 INFO L134 LiptonReduction]: Checked pairs total: 408501 [2023-09-01 09:16:44,425 INFO L136 LiptonReduction]: Total number of compositions: 409 [2023-09-01 09:16:44,427 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:16:44,427 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;@54bedb48, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:16:44,427 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:16:44,462 INFO L130 PetriNetUnfolder]: 28/161 cut-off events. [2023-09-01 09:16:44,462 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 09:16:44,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:16:44,463 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:16:44,463 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:16:44,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:16:44,464 INFO L85 PathProgramCache]: Analyzing trace with hash 657747243, now seen corresponding path program 1 times [2023-09-01 09:16:44,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:16:44,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506374406] [2023-09-01 09:16:44,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:16:44,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:16:44,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:16:44,515 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:16:44,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:16:44,550 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:16:44,550 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:16:44,550 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:16:44,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 09:16:44,551 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:16:44,551 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:16:44,551 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:16:44,552 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-09-01 09:16:44,646 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:16:44,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 539 places, 588 transitions, 1253 flow [2023-09-01 09:16:44,803 INFO L130 PetriNetUnfolder]: 71/670 cut-off events. [2023-09-01 09:16:44,804 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-09-01 09:16:44,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 720 conditions, 670 events. 71/670 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2752 event pairs, 0 based on Foata normal form. 0/584 useless extension candidates. Maximal degree in co-relation 605. Up to 16 conditions per place. [2023-09-01 09:16:44,817 INFO L82 GeneralOperation]: Start removeDead. Operand has 539 places, 588 transitions, 1253 flow [2023-09-01 09:16:44,824 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 539 places, 588 transitions, 1253 flow [2023-09-01 09:16:44,824 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:16:44,824 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 539 places, 588 transitions, 1253 flow [2023-09-01 09:16:44,824 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 539 places, 588 transitions, 1253 flow [2023-09-01 09:16:44,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 539 places, 588 transitions, 1253 flow [2023-09-01 09:16:44,987 INFO L130 PetriNetUnfolder]: 71/670 cut-off events. [2023-09-01 09:16:44,987 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-09-01 09:16:44,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 720 conditions, 670 events. 71/670 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2752 event pairs, 0 based on Foata normal form. 0/584 useless extension candidates. Maximal degree in co-relation 605. Up to 16 conditions per place. [2023-09-01 09:16:45,051 INFO L119 LiptonReduction]: Number of co-enabled transitions 273000 [2023-09-01 09:16:57,181 INFO L134 LiptonReduction]: Checked pairs total: 601155 [2023-09-01 09:16:57,182 INFO L136 LiptonReduction]: Total number of compositions: 471 [2023-09-01 09:16:57,183 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:16:57,183 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;@54bedb48, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:16:57,183 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:16:57,204 INFO L130 PetriNetUnfolder]: 36/196 cut-off events. [2023-09-01 09:16:57,205 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-09-01 09:16:57,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:16:57,205 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:16:57,205 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:16:57,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:16:57,206 INFO L85 PathProgramCache]: Analyzing trace with hash 31876957, now seen corresponding path program 1 times [2023-09-01 09:16:57,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:16:57,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262742334] [2023-09-01 09:16:57,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:16:57,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:16:57,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:16:57,251 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:16:57,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:16:57,285 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:16:57,285 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:16:57,285 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:16:57,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 09:16:57,286 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:16:57,287 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:16:57,287 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:16:57,287 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-09-01 09:16:57,441 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:16:57,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 611 places, 667 transitions, 1430 flow [2023-09-01 09:16:57,669 INFO L130 PetriNetUnfolder]: 81/761 cut-off events. [2023-09-01 09:16:57,669 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-09-01 09:16:57,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 822 conditions, 761 events. 81/761 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 3271 event pairs, 0 based on Foata normal form. 0/663 useless extension candidates. Maximal degree in co-relation 704. Up to 18 conditions per place. [2023-09-01 09:16:57,688 INFO L82 GeneralOperation]: Start removeDead. Operand has 611 places, 667 transitions, 1430 flow [2023-09-01 09:16:57,698 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 611 places, 667 transitions, 1430 flow [2023-09-01 09:16:57,698 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:16:57,698 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 611 places, 667 transitions, 1430 flow [2023-09-01 09:16:57,699 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 611 places, 667 transitions, 1430 flow [2023-09-01 09:16:57,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 611 places, 667 transitions, 1430 flow [2023-09-01 09:16:57,912 INFO L130 PetriNetUnfolder]: 81/761 cut-off events. [2023-09-01 09:16:57,912 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-09-01 09:16:57,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 822 conditions, 761 events. 81/761 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 3271 event pairs, 0 based on Foata normal form. 0/663 useless extension candidates. Maximal degree in co-relation 704. Up to 18 conditions per place. [2023-09-01 09:16:57,963 INFO L119 LiptonReduction]: Number of co-enabled transitions 361296 [2023-09-01 09:17:11,086 INFO L134 LiptonReduction]: Checked pairs total: 812240 [2023-09-01 09:17:11,086 INFO L136 LiptonReduction]: Total number of compositions: 534 [2023-09-01 09:17:11,087 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:17:11,088 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;@54bedb48, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:17:11,088 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:17:11,115 INFO L130 PetriNetUnfolder]: 43/232 cut-off events. [2023-09-01 09:17:11,115 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-09-01 09:17:11,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:17:11,116 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:17:11,116 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:17:11,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:17:11,116 INFO L85 PathProgramCache]: Analyzing trace with hash -277617304, now seen corresponding path program 1 times [2023-09-01 09:17:11,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:17:11,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454136562] [2023-09-01 09:17:11,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:17:11,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:17:11,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:17:11,144 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:17:11,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:17:11,176 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:17:11,177 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:17:11,177 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:17:11,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 09:17:11,177 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:17:11,179 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:17:11,179 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:17:11,179 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-09-01 09:17:11,282 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:17:11,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 683 places, 746 transitions, 1609 flow [2023-09-01 09:17:11,510 INFO L130 PetriNetUnfolder]: 91/852 cut-off events. [2023-09-01 09:17:11,510 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-09-01 09:17:11,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 925 conditions, 852 events. 91/852 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 3787 event pairs, 0 based on Foata normal form. 0/742 useless extension candidates. Maximal degree in co-relation 804. Up to 20 conditions per place. [2023-09-01 09:17:11,525 INFO L82 GeneralOperation]: Start removeDead. Operand has 683 places, 746 transitions, 1609 flow [2023-09-01 09:17:11,535 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 683 places, 746 transitions, 1609 flow [2023-09-01 09:17:11,535 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:17:11,536 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 683 places, 746 transitions, 1609 flow [2023-09-01 09:17:11,536 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 683 places, 746 transitions, 1609 flow [2023-09-01 09:17:11,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 683 places, 746 transitions, 1609 flow [2023-09-01 09:17:11,828 INFO L130 PetriNetUnfolder]: 91/852 cut-off events. [2023-09-01 09:17:11,828 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-09-01 09:17:11,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 925 conditions, 852 events. 91/852 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 3787 event pairs, 0 based on Foata normal form. 0/742 useless extension candidates. Maximal degree in co-relation 804. Up to 20 conditions per place. [2023-09-01 09:17:11,900 INFO L119 LiptonReduction]: Number of co-enabled transitions 461916 [2023-09-01 09:17:26,827 INFO L134 LiptonReduction]: Checked pairs total: 929047 [2023-09-01 09:17:26,827 INFO L136 LiptonReduction]: Total number of compositions: 598 [2023-09-01 09:17:26,828 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:17:26,829 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;@54bedb48, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:17:26,829 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:17:26,857 INFO L130 PetriNetUnfolder]: 50/266 cut-off events. [2023-09-01 09:17:26,857 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-09-01 09:17:26,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:17:26,857 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:17:26,857 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:17:26,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:17:26,858 INFO L85 PathProgramCache]: Analyzing trace with hash -392173397, now seen corresponding path program 1 times [2023-09-01 09:17:26,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:17:26,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971503435] [2023-09-01 09:17:26,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:17:26,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:17:26,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:17:26,880 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:17:26,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:17:26,900 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:17:26,900 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:17:26,900 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:17:26,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 09:17:26,901 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:17:26,901 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:17:26,901 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:17:26,901 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-09-01 09:17:27,045 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:17:27,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 755 places, 825 transitions, 1790 flow [2023-09-01 09:17:27,316 INFO L130 PetriNetUnfolder]: 101/943 cut-off events. [2023-09-01 09:17:27,316 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-09-01 09:17:27,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1029 conditions, 943 events. 101/943 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 4319 event pairs, 0 based on Foata normal form. 0/821 useless extension candidates. Maximal degree in co-relation 905. Up to 22 conditions per place. [2023-09-01 09:17:27,335 INFO L82 GeneralOperation]: Start removeDead. Operand has 755 places, 825 transitions, 1790 flow [2023-09-01 09:17:27,347 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 755 places, 825 transitions, 1790 flow [2023-09-01 09:17:27,348 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:17:27,348 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 755 places, 825 transitions, 1790 flow [2023-09-01 09:17:27,348 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 755 places, 825 transitions, 1790 flow [2023-09-01 09:17:27,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 755 places, 825 transitions, 1790 flow [2023-09-01 09:17:27,679 INFO L130 PetriNetUnfolder]: 101/943 cut-off events. [2023-09-01 09:17:27,679 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-09-01 09:17:27,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1029 conditions, 943 events. 101/943 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 4319 event pairs, 0 based on Foata normal form. 0/821 useless extension candidates. Maximal degree in co-relation 905. Up to 22 conditions per place. [2023-09-01 09:17:27,800 INFO L119 LiptonReduction]: Number of co-enabled transitions 574860 [2023-09-01 09:17:44,279 INFO L134 LiptonReduction]: Checked pairs total: 1167442 [2023-09-01 09:17:44,280 INFO L136 LiptonReduction]: Total number of compositions: 663 [2023-09-01 09:17:44,281 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:17:44,281 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;@54bedb48, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:17:44,281 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:17:44,351 INFO L130 PetriNetUnfolder]: 57/300 cut-off events. [2023-09-01 09:17:44,352 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-09-01 09:17:44,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:17:44,352 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:17:44,352 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:17:44,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:17:44,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1279378807, now seen corresponding path program 1 times [2023-09-01 09:17:44,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:17:44,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762220885] [2023-09-01 09:17:44,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:17:44,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:17:44,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:17:44,382 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:17:44,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:17:44,404 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:17:44,405 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:17:44,405 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:17:44,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 09:17:44,405 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:17:44,406 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:17:44,406 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:17:44,406 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-09-01 09:17:44,534 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:17:44,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 827 places, 904 transitions, 1973 flow [2023-09-01 09:17:44,860 INFO L130 PetriNetUnfolder]: 111/1034 cut-off events. [2023-09-01 09:17:44,860 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-09-01 09:17:44,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1134 conditions, 1034 events. 111/1034 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 4832 event pairs, 0 based on Foata normal form. 0/900 useless extension candidates. Maximal degree in co-relation 1009. Up to 24 conditions per place. [2023-09-01 09:17:44,883 INFO L82 GeneralOperation]: Start removeDead. Operand has 827 places, 904 transitions, 1973 flow [2023-09-01 09:17:44,893 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 827 places, 904 transitions, 1973 flow [2023-09-01 09:17:44,893 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:17:44,893 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 827 places, 904 transitions, 1973 flow [2023-09-01 09:17:44,893 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 827 places, 904 transitions, 1973 flow [2023-09-01 09:17:44,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 827 places, 904 transitions, 1973 flow [2023-09-01 09:17:45,244 INFO L130 PetriNetUnfolder]: 111/1034 cut-off events. [2023-09-01 09:17:45,244 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-09-01 09:17:45,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1134 conditions, 1034 events. 111/1034 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 4832 event pairs, 0 based on Foata normal form. 0/900 useless extension candidates. Maximal degree in co-relation 1009. Up to 24 conditions per place. [2023-09-01 09:17:45,356 INFO L119 LiptonReduction]: Number of co-enabled transitions 700128 [2023-09-01 09:18:03,269 INFO L134 LiptonReduction]: Checked pairs total: 1457710 [2023-09-01 09:18:03,270 INFO L136 LiptonReduction]: Total number of compositions: 726 [2023-09-01 09:18:03,271 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:18:03,272 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;@54bedb48, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:18:03,272 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:18:03,322 INFO L130 PetriNetUnfolder]: 64/332 cut-off events. [2023-09-01 09:18:03,322 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-09-01 09:18:03,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:18:03,322 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:18:03,323 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:18:03,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:18:03,323 INFO L85 PathProgramCache]: Analyzing trace with hash -2091456884, now seen corresponding path program 1 times [2023-09-01 09:18:03,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:18:03,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847871189] [2023-09-01 09:18:03,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:18:03,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:18:03,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:18:03,352 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:18:03,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:18:03,378 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:18:03,379 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:18:03,379 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:18:03,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 09:18:03,379 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:18:03,381 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:18:03,381 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:18:03,381 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-09-01 09:18:03,533 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:18:03,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 899 places, 983 transitions, 2158 flow [2023-09-01 09:18:04,004 INFO L130 PetriNetUnfolder]: 121/1125 cut-off events. [2023-09-01 09:18:04,005 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-09-01 09:18:04,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1240 conditions, 1125 events. 121/1125 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 5341 event pairs, 0 based on Foata normal form. 0/979 useless extension candidates. Maximal degree in co-relation 1114. Up to 26 conditions per place. [2023-09-01 09:18:04,035 INFO L82 GeneralOperation]: Start removeDead. Operand has 899 places, 983 transitions, 2158 flow [2023-09-01 09:18:04,046 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 899 places, 983 transitions, 2158 flow [2023-09-01 09:18:04,046 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:18:04,047 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 899 places, 983 transitions, 2158 flow [2023-09-01 09:18:04,047 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 899 places, 983 transitions, 2158 flow [2023-09-01 09:18:04,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 899 places, 983 transitions, 2158 flow [2023-09-01 09:18:04,365 INFO L130 PetriNetUnfolder]: 121/1125 cut-off events. [2023-09-01 09:18:04,365 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-09-01 09:18:04,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1240 conditions, 1125 events. 121/1125 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 5341 event pairs, 0 based on Foata normal form. 0/979 useless extension candidates. Maximal degree in co-relation 1114. Up to 26 conditions per place. [2023-09-01 09:18:04,520 INFO L119 LiptonReduction]: Number of co-enabled transitions 837720 [2023-09-01 09:18:24,293 INFO L134 LiptonReduction]: Checked pairs total: 1744929 [2023-09-01 09:18:24,293 INFO L136 LiptonReduction]: Total number of compositions: 788 [2023-09-01 09:18:24,295 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:18:24,295 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;@54bedb48, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:18:24,295 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:18:24,335 INFO L130 PetriNetUnfolder]: 70/366 cut-off events. [2023-09-01 09:18:24,336 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-09-01 09:18:24,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:18:24,336 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 09:18:24,336 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:18:24,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:18:24,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1844041229, now seen corresponding path program 1 times [2023-09-01 09:18:24,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:18:24,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965959194] [2023-09-01 09:18:24,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:18:24,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:18:24,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:18:24,365 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:18:24,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:18:24,394 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:18:24,394 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:18:24,394 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:18:24,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 09:18:24,395 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:18:24,395 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:18:24,395 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:18:24,395 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-09-01 09:18:24,546 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:18:24,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 971 places, 1062 transitions, 2345 flow [2023-09-01 09:18:24,994 INFO L130 PetriNetUnfolder]: 131/1216 cut-off events. [2023-09-01 09:18:24,995 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-09-01 09:18:25,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1347 conditions, 1216 events. 131/1216 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 5848 event pairs, 0 based on Foata normal form. 0/1058 useless extension candidates. Maximal degree in co-relation 1220. Up to 28 conditions per place. [2023-09-01 09:18:25,024 INFO L82 GeneralOperation]: Start removeDead. Operand has 971 places, 1062 transitions, 2345 flow [2023-09-01 09:18:25,040 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 971 places, 1062 transitions, 2345 flow [2023-09-01 09:18:25,040 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:18:25,040 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 971 places, 1062 transitions, 2345 flow [2023-09-01 09:18:25,040 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 971 places, 1062 transitions, 2345 flow [2023-09-01 09:18:25,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 971 places, 1062 transitions, 2345 flow [2023-09-01 09:18:25,431 INFO L130 PetriNetUnfolder]: 131/1216 cut-off events. [2023-09-01 09:18:25,431 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-09-01 09:18:25,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1347 conditions, 1216 events. 131/1216 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 5848 event pairs, 0 based on Foata normal form. 0/1058 useless extension candidates. Maximal degree in co-relation 1220. Up to 28 conditions per place. [2023-09-01 09:18:25,631 INFO L119 LiptonReduction]: Number of co-enabled transitions 987636 [2023-09-01 09:18:46,971 INFO L134 LiptonReduction]: Checked pairs total: 2255991 [2023-09-01 09:18:46,971 INFO L136 LiptonReduction]: Total number of compositions: 848 [2023-09-01 09:18:46,973 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:18:46,974 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;@54bedb48, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:18:46,974 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:18:47,026 INFO L130 PetriNetUnfolder]: 78/404 cut-off events. [2023-09-01 09:18:47,027 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-09-01 09:18:47,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:18:47,027 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 09:18:47,027 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:18:47,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:18:47,027 INFO L85 PathProgramCache]: Analyzing trace with hash -268375454, now seen corresponding path program 1 times [2023-09-01 09:18:47,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:18:47,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529759720] [2023-09-01 09:18:47,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:18:47,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:18:47,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:18:47,054 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:18:47,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:18:47,083 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:18:47,083 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:18:47,084 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:18:47,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 09:18:47,084 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:18:47,084 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:18:47,085 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:18:47,085 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-09-01 09:18:47,255 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:18:47,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1043 places, 1141 transitions, 2534 flow [2023-09-01 09:18:47,702 INFO L130 PetriNetUnfolder]: 141/1307 cut-off events. [2023-09-01 09:18:47,703 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-09-01 09:18:47,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1455 conditions, 1307 events. 141/1307 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 6367 event pairs, 0 based on Foata normal form. 0/1137 useless extension candidates. Maximal degree in co-relation 1327. Up to 30 conditions per place. [2023-09-01 09:18:47,743 INFO L82 GeneralOperation]: Start removeDead. Operand has 1043 places, 1141 transitions, 2534 flow [2023-09-01 09:18:47,759 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1043 places, 1141 transitions, 2534 flow [2023-09-01 09:18:47,759 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:18:47,759 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1043 places, 1141 transitions, 2534 flow [2023-09-01 09:18:47,759 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1043 places, 1141 transitions, 2534 flow [2023-09-01 09:18:47,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1043 places, 1141 transitions, 2534 flow [2023-09-01 09:18:48,195 INFO L130 PetriNetUnfolder]: 141/1307 cut-off events. [2023-09-01 09:18:48,195 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-09-01 09:18:48,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1455 conditions, 1307 events. 141/1307 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 6367 event pairs, 0 based on Foata normal form. 0/1137 useless extension candidates. Maximal degree in co-relation 1327. Up to 30 conditions per place. [2023-09-01 09:18:48,383 INFO L119 LiptonReduction]: Number of co-enabled transitions 1149876 [2023-09-01 09:19:11,805 INFO L134 LiptonReduction]: Checked pairs total: 2617201 [2023-09-01 09:19:11,806 INFO L136 LiptonReduction]: Total number of compositions: 914 [2023-09-01 09:19:11,807 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:19:11,807 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@54bedb48, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:19:11,807 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:19:11,924 INFO L130 PetriNetUnfolder]: 84/437 cut-off events. [2023-09-01 09:19:11,924 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-09-01 09:19:11,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:19:11,924 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 09:19:11,924 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:19:11,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:19:11,925 INFO L85 PathProgramCache]: Analyzing trace with hash 72312746, now seen corresponding path program 1 times [2023-09-01 09:19:11,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:19:11,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33346578] [2023-09-01 09:19:11,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:19:11,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:19:11,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:19:11,954 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:19:11,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:19:11,984 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:19:11,984 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:19:11,985 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:19:11,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-09-01 09:19:11,985 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:19:11,985 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:19:11,986 WARN L233 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:19:11,986 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2023-09-01 09:19:12,203 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:19:12,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1115 places, 1220 transitions, 2725 flow [2023-09-01 09:19:12,715 INFO L130 PetriNetUnfolder]: 151/1398 cut-off events. [2023-09-01 09:19:12,715 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-09-01 09:19:12,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1564 conditions, 1398 events. 151/1398 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 6913 event pairs, 0 based on Foata normal form. 0/1216 useless extension candidates. Maximal degree in co-relation 1435. Up to 32 conditions per place. [2023-09-01 09:19:12,764 INFO L82 GeneralOperation]: Start removeDead. Operand has 1115 places, 1220 transitions, 2725 flow [2023-09-01 09:19:12,782 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1115 places, 1220 transitions, 2725 flow [2023-09-01 09:19:12,782 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:19:12,782 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1115 places, 1220 transitions, 2725 flow [2023-09-01 09:19:12,782 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1115 places, 1220 transitions, 2725 flow [2023-09-01 09:19:12,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1115 places, 1220 transitions, 2725 flow [2023-09-01 09:19:13,351 INFO L130 PetriNetUnfolder]: 151/1398 cut-off events. [2023-09-01 09:19:13,351 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-09-01 09:19:13,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1564 conditions, 1398 events. 151/1398 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 6913 event pairs, 0 based on Foata normal form. 0/1216 useless extension candidates. Maximal degree in co-relation 1435. Up to 32 conditions per place. [2023-09-01 09:19:13,549 INFO L119 LiptonReduction]: Number of co-enabled transitions 1324440 [2023-09-01 09:19:38,482 INFO L134 LiptonReduction]: Checked pairs total: 2975786 [2023-09-01 09:19:38,482 INFO L136 LiptonReduction]: Total number of compositions: 974 [2023-09-01 09:19:38,484 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:19:38,484 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;@54bedb48, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:19:38,484 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:19:38,563 INFO L130 PetriNetUnfolder]: 91/468 cut-off events. [2023-09-01 09:19:38,563 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-09-01 09:19:38,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:19:38,564 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 09:19:38,564 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:19:38,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:19:38,564 INFO L85 PathProgramCache]: Analyzing trace with hash 459114490, now seen corresponding path program 1 times [2023-09-01 09:19:38,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:19:38,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001577707] [2023-09-01 09:19:38,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:19:38,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:19:38,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:19:38,603 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:19:38,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:19:38,640 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:19:38,641 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:19:38,642 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:19:38,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-09-01 09:19:38,643 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:19:38,643 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:19:38,643 WARN L233 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:19:38,643 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2023-09-01 09:19:38,827 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:19:38,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1187 places, 1299 transitions, 2918 flow [2023-09-01 09:19:39,441 INFO L130 PetriNetUnfolder]: 161/1489 cut-off events. [2023-09-01 09:19:39,441 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-09-01 09:19:39,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1674 conditions, 1489 events. 161/1489 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 7400 event pairs, 0 based on Foata normal form. 0/1295 useless extension candidates. Maximal degree in co-relation 1544. Up to 34 conditions per place. [2023-09-01 09:19:39,496 INFO L82 GeneralOperation]: Start removeDead. Operand has 1187 places, 1299 transitions, 2918 flow [2023-09-01 09:19:39,517 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1187 places, 1299 transitions, 2918 flow [2023-09-01 09:19:39,517 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:19:39,517 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1187 places, 1299 transitions, 2918 flow [2023-09-01 09:19:39,518 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1187 places, 1299 transitions, 2918 flow [2023-09-01 09:19:39,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1187 places, 1299 transitions, 2918 flow [2023-09-01 09:19:40,071 INFO L130 PetriNetUnfolder]: 161/1489 cut-off events. [2023-09-01 09:19:40,071 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-09-01 09:19:40,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1674 conditions, 1489 events. 161/1489 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 7400 event pairs, 0 based on Foata normal form. 0/1295 useless extension candidates. Maximal degree in co-relation 1544. Up to 34 conditions per place. [2023-09-01 09:19:40,342 INFO L119 LiptonReduction]: Number of co-enabled transitions 1511328 [2023-09-01 09:20:07,351 INFO L134 LiptonReduction]: Checked pairs total: 3418394 [2023-09-01 09:20:07,352 INFO L136 LiptonReduction]: Total number of compositions: 1043 [2023-09-01 09:20:07,353 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:20:07,354 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;@54bedb48, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:20:07,354 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:20:07,423 INFO L130 PetriNetUnfolder]: 98/504 cut-off events. [2023-09-01 09:20:07,423 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-09-01 09:20:07,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:20:07,423 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 09:20:07,423 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:20:07,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:20:07,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1151175113, now seen corresponding path program 1 times [2023-09-01 09:20:07,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:20:07,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271148365] [2023-09-01 09:20:07,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:20:07,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:20:07,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:20:07,462 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:20:07,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:20:07,495 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:20:07,495 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:20:07,496 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:20:07,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-09-01 09:20:07,496 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:20:07,496 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:20:07,497 WARN L233 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:20:07,497 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2023-09-01 09:20:07,738 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:20:07,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1259 places, 1378 transitions, 3113 flow [2023-09-01 09:20:08,417 INFO L130 PetriNetUnfolder]: 171/1580 cut-off events. [2023-09-01 09:20:08,417 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-09-01 09:20:08,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1785 conditions, 1580 events. 171/1580 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 7910 event pairs, 0 based on Foata normal form. 0/1374 useless extension candidates. Maximal degree in co-relation 1654. Up to 36 conditions per place. [2023-09-01 09:20:08,482 INFO L82 GeneralOperation]: Start removeDead. Operand has 1259 places, 1378 transitions, 3113 flow [2023-09-01 09:20:08,505 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1259 places, 1378 transitions, 3113 flow [2023-09-01 09:20:08,505 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:20:08,505 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1259 places, 1378 transitions, 3113 flow [2023-09-01 09:20:08,506 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1259 places, 1378 transitions, 3113 flow [2023-09-01 09:20:08,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1259 places, 1378 transitions, 3113 flow [2023-09-01 09:20:09,130 INFO L130 PetriNetUnfolder]: 171/1580 cut-off events. [2023-09-01 09:20:09,130 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-09-01 09:20:09,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1785 conditions, 1580 events. 171/1580 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 7910 event pairs, 0 based on Foata normal form. 0/1374 useless extension candidates. Maximal degree in co-relation 1654. Up to 36 conditions per place. [2023-09-01 09:20:09,412 INFO L119 LiptonReduction]: Number of co-enabled transitions 1710540 [2023-09-01 09:20:37,571 INFO L134 LiptonReduction]: Checked pairs total: 3860000 [2023-09-01 09:20:37,572 INFO L136 LiptonReduction]: Total number of compositions: 1094 [2023-09-01 09:20:37,573 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:20:37,574 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;@54bedb48, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:20:37,574 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:20:37,714 INFO L130 PetriNetUnfolder]: 106/539 cut-off events. [2023-09-01 09:20:37,714 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-09-01 09:20:37,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:20:37,714 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 09:20:37,715 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:20:37,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:20:37,715 INFO L85 PathProgramCache]: Analyzing trace with hash 2044922245, now seen corresponding path program 1 times [2023-09-01 09:20:37,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:20:37,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562391173] [2023-09-01 09:20:37,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:20:37,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:20:37,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:20:37,750 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:20:37,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:20:37,786 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:20:37,787 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:20:37,787 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:20:37,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-09-01 09:20:37,787 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:20:37,788 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:20:37,788 WARN L233 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:20:37,788 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2023-09-01 09:20:37,966 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:20:37,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1331 places, 1457 transitions, 3310 flow [2023-09-01 09:20:38,709 INFO L130 PetriNetUnfolder]: 181/1671 cut-off events. [2023-09-01 09:20:38,709 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-09-01 09:20:38,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1897 conditions, 1671 events. 181/1671 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 8434 event pairs, 0 based on Foata normal form. 0/1453 useless extension candidates. Maximal degree in co-relation 1765. Up to 38 conditions per place. [2023-09-01 09:20:38,790 INFO L82 GeneralOperation]: Start removeDead. Operand has 1331 places, 1457 transitions, 3310 flow [2023-09-01 09:20:38,820 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1331 places, 1457 transitions, 3310 flow [2023-09-01 09:20:38,820 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:20:38,820 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1331 places, 1457 transitions, 3310 flow [2023-09-01 09:20:38,821 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1331 places, 1457 transitions, 3310 flow [2023-09-01 09:20:38,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1331 places, 1457 transitions, 3310 flow [2023-09-01 09:20:39,601 INFO L130 PetriNetUnfolder]: 181/1671 cut-off events. [2023-09-01 09:20:39,601 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-09-01 09:20:39,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1897 conditions, 1671 events. 181/1671 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 8434 event pairs, 0 based on Foata normal form. 0/1453 useless extension candidates. Maximal degree in co-relation 1765. Up to 38 conditions per place. [2023-09-01 09:20:39,951 INFO L119 LiptonReduction]: Number of co-enabled transitions 1922076 [2023-09-01 09:21:11,130 INFO L134 LiptonReduction]: Checked pairs total: 4368552 [2023-09-01 09:21:11,131 INFO L136 LiptonReduction]: Total number of compositions: 1165 [2023-09-01 09:21:11,132 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:21:11,132 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;@54bedb48, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:21:11,132 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:21:11,233 INFO L130 PetriNetUnfolder]: 113/573 cut-off events. [2023-09-01 09:21:11,233 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-09-01 09:21:11,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:21:11,233 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 09:21:11,233 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:21:11,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:21:11,233 INFO L85 PathProgramCache]: Analyzing trace with hash -28340825, now seen corresponding path program 1 times [2023-09-01 09:21:11,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:21:11,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910568926] [2023-09-01 09:21:11,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:21:11,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:21:11,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:21:11,273 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:21:11,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:21:11,314 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:21:11,315 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:21:11,315 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:21:11,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-09-01 09:21:11,315 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:21:11,315 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:21:11,316 WARN L233 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:21:11,316 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2023-09-01 09:21:11,501 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:21:11,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1403 places, 1536 transitions, 3509 flow [2023-09-01 09:21:12,260 INFO L130 PetriNetUnfolder]: 191/1762 cut-off events. [2023-09-01 09:21:12,261 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-09-01 09:21:12,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2010 conditions, 1762 events. 191/1762 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 8943 event pairs, 0 based on Foata normal form. 0/1532 useless extension candidates. Maximal degree in co-relation 1877. Up to 40 conditions per place. [2023-09-01 09:21:12,333 INFO L82 GeneralOperation]: Start removeDead. Operand has 1403 places, 1536 transitions, 3509 flow [2023-09-01 09:21:12,362 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1403 places, 1536 transitions, 3509 flow [2023-09-01 09:21:12,362 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:21:12,362 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1403 places, 1536 transitions, 3509 flow [2023-09-01 09:21:12,363 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1403 places, 1536 transitions, 3509 flow [2023-09-01 09:21:12,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1403 places, 1536 transitions, 3509 flow [2023-09-01 09:21:13,062 INFO L130 PetriNetUnfolder]: 191/1762 cut-off events. [2023-09-01 09:21:13,063 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-09-01 09:21:13,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2010 conditions, 1762 events. 191/1762 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 8943 event pairs, 0 based on Foata normal form. 0/1532 useless extension candidates. Maximal degree in co-relation 1877. Up to 40 conditions per place. [2023-09-01 09:21:13,634 INFO L119 LiptonReduction]: Number of co-enabled transitions 2145936 [2023-09-01 09:21:45,800 INFO L134 LiptonReduction]: Checked pairs total: 4909396 [2023-09-01 09:21:45,801 INFO L136 LiptonReduction]: Total number of compositions: 1227 [2023-09-01 09:21:45,802 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:21:45,802 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;@54bedb48, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:21:45,803 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:21:45,904 INFO L130 PetriNetUnfolder]: 120/608 cut-off events. [2023-09-01 09:21:45,904 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-09-01 09:21:45,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:21:45,904 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 09:21:45,904 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:21:45,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:21:45,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1576653855, now seen corresponding path program 1 times [2023-09-01 09:21:45,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:21:45,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531379414] [2023-09-01 09:21:45,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:21:45,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:21:45,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:21:45,944 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:21:45,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:21:45,987 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:21:45,988 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:21:45,988 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:21:45,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-09-01 09:21:45,988 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:21:45,989 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:21:45,989 WARN L233 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:21:45,989 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2023-09-01 09:21:46,177 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:21:46,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1475 places, 1615 transitions, 3710 flow [2023-09-01 09:21:46,989 INFO L130 PetriNetUnfolder]: 201/1853 cut-off events. [2023-09-01 09:21:46,989 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-09-01 09:21:47,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2124 conditions, 1853 events. 201/1853 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 9439 event pairs, 0 based on Foata normal form. 0/1611 useless extension candidates. Maximal degree in co-relation 1990. Up to 42 conditions per place. [2023-09-01 09:21:47,084 INFO L82 GeneralOperation]: Start removeDead. Operand has 1475 places, 1615 transitions, 3710 flow [2023-09-01 09:21:47,121 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1475 places, 1615 transitions, 3710 flow [2023-09-01 09:21:47,121 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:21:47,121 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1475 places, 1615 transitions, 3710 flow [2023-09-01 09:21:47,121 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1475 places, 1615 transitions, 3710 flow [2023-09-01 09:21:47,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1475 places, 1615 transitions, 3710 flow [2023-09-01 09:21:47,935 INFO L130 PetriNetUnfolder]: 201/1853 cut-off events. [2023-09-01 09:21:47,935 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-09-01 09:21:48,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2124 conditions, 1853 events. 201/1853 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 9439 event pairs, 0 based on Foata normal form. 0/1611 useless extension candidates. Maximal degree in co-relation 1990. Up to 42 conditions per place. [2023-09-01 09:21:48,564 INFO L119 LiptonReduction]: Number of co-enabled transitions 2382120 [2023-09-01 09:22:22,189 INFO L134 LiptonReduction]: Checked pairs total: 5438150 [2023-09-01 09:22:22,189 INFO L136 LiptonReduction]: Total number of compositions: 1292 [2023-09-01 09:22:22,191 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:22:22,191 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;@54bedb48, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:22:22,191 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:22:22,302 INFO L130 PetriNetUnfolder]: 126/641 cut-off events. [2023-09-01 09:22:22,302 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-09-01 09:22:22,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:22:22,303 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 09:22:22,303 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:22:22,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:22:22,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1517417906, now seen corresponding path program 1 times [2023-09-01 09:22:22,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:22:22,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438965587] [2023-09-01 09:22:22,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:22:22,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:22:22,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:22:22,342 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:22:22,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:22:22,397 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:22:22,397 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:22:22,397 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:22:22,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-09-01 09:22:22,397 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:22:22,398 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:22:22,398 WARN L233 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:22:22,398 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2023-09-01 09:22:22,676 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:22:22,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1547 places, 1694 transitions, 3913 flow [2023-09-01 09:22:23,757 INFO L130 PetriNetUnfolder]: 211/1944 cut-off events. [2023-09-01 09:22:23,757 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-09-01 09:22:23,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2239 conditions, 1944 events. 211/1944 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 9979 event pairs, 0 based on Foata normal form. 0/1690 useless extension candidates. Maximal degree in co-relation 2104. Up to 44 conditions per place. [2023-09-01 09:22:23,838 INFO L82 GeneralOperation]: Start removeDead. Operand has 1547 places, 1694 transitions, 3913 flow [2023-09-01 09:22:23,869 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1547 places, 1694 transitions, 3913 flow [2023-09-01 09:22:23,870 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:22:23,870 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1547 places, 1694 transitions, 3913 flow [2023-09-01 09:22:23,870 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1547 places, 1694 transitions, 3913 flow [2023-09-01 09:22:23,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1547 places, 1694 transitions, 3913 flow [2023-09-01 09:22:24,951 INFO L130 PetriNetUnfolder]: 211/1944 cut-off events. [2023-09-01 09:22:24,951 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-09-01 09:22:25,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2239 conditions, 1944 events. 211/1944 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 9979 event pairs, 0 based on Foata normal form. 0/1690 useless extension candidates. Maximal degree in co-relation 2104. Up to 44 conditions per place. [2023-09-01 09:22:25,507 INFO L119 LiptonReduction]: Number of co-enabled transitions 2630628 [2023-09-01 09:23:01,341 INFO L134 LiptonReduction]: Checked pairs total: 6023620 [2023-09-01 09:23:01,341 INFO L136 LiptonReduction]: Total number of compositions: 1352 [2023-09-01 09:23:01,343 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:23:01,343 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;@54bedb48, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:23:01,343 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:23:01,468 INFO L130 PetriNetUnfolder]: 133/677 cut-off events. [2023-09-01 09:23:01,468 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-09-01 09:23:01,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:23:01,468 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 09:23:01,468 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:23:01,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:23:01,469 INFO L85 PathProgramCache]: Analyzing trace with hash 487342399, now seen corresponding path program 1 times [2023-09-01 09:23:01,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:23:01,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730817761] [2023-09-01 09:23:01,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:23:01,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:23:01,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:23:01,538 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:23:01,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:23:01,585 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:23:01,585 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:23:01,585 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:23:01,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-09-01 09:23:01,585 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:23:01,586 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:23:01,586 WARN L233 ceAbstractionStarter]: 21 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:23:01,586 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 22 thread instances. [2023-09-01 09:23:01,801 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:23:01,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1619 places, 1773 transitions, 4118 flow [2023-09-01 09:23:02,952 INFO L130 PetriNetUnfolder]: 221/2035 cut-off events. [2023-09-01 09:23:02,952 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-09-01 09:23:03,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2355 conditions, 2035 events. 221/2035 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 10464 event pairs, 0 based on Foata normal form. 0/1769 useless extension candidates. Maximal degree in co-relation 2219. Up to 46 conditions per place. [2023-09-01 09:23:03,054 INFO L82 GeneralOperation]: Start removeDead. Operand has 1619 places, 1773 transitions, 4118 flow [2023-09-01 09:23:03,094 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1619 places, 1773 transitions, 4118 flow [2023-09-01 09:23:03,095 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:23:03,095 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1619 places, 1773 transitions, 4118 flow [2023-09-01 09:23:03,095 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1619 places, 1773 transitions, 4118 flow [2023-09-01 09:23:03,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1619 places, 1773 transitions, 4118 flow [2023-09-01 09:23:04,259 INFO L130 PetriNetUnfolder]: 221/2035 cut-off events. [2023-09-01 09:23:04,259 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-09-01 09:23:04,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2355 conditions, 2035 events. 221/2035 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 10464 event pairs, 0 based on Foata normal form. 0/1769 useless extension candidates. Maximal degree in co-relation 2219. Up to 46 conditions per place. [2023-09-01 09:23:05,158 INFO L119 LiptonReduction]: Number of co-enabled transitions 2891460 [2023-09-01 09:23:43,541 INFO L134 LiptonReduction]: Checked pairs total: 5961511 [2023-09-01 09:23:43,541 INFO L136 LiptonReduction]: Total number of compositions: 1418 [2023-09-01 09:23:43,542 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:23:43,543 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;@54bedb48, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:23:43,543 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:23:43,677 INFO L130 PetriNetUnfolder]: 141/711 cut-off events. [2023-09-01 09:23:43,677 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-09-01 09:23:43,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:23:43,677 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 09:23:43,677 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:23:43,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:23:43,677 INFO L85 PathProgramCache]: Analyzing trace with hash -232205019, now seen corresponding path program 1 times [2023-09-01 09:23:43,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:23:43,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061508251] [2023-09-01 09:23:43,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:23:43,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:23:43,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:23:43,725 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:23:43,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:23:43,775 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:23:43,775 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:23:43,775 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:23:43,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-09-01 09:23:43,776 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:23:43,776 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:23:43,776 WARN L233 ceAbstractionStarter]: 22 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:23:43,776 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 23 thread instances. [2023-09-01 09:23:44,003 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:23:44,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1691 places, 1852 transitions, 4325 flow [2023-09-01 09:23:45,229 INFO L130 PetriNetUnfolder]: 231/2126 cut-off events. [2023-09-01 09:23:45,229 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-09-01 09:23:45,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2472 conditions, 2126 events. 231/2126 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 10988 event pairs, 0 based on Foata normal form. 0/1848 useless extension candidates. Maximal degree in co-relation 2335. Up to 48 conditions per place. [2023-09-01 09:23:45,344 INFO L82 GeneralOperation]: Start removeDead. Operand has 1691 places, 1852 transitions, 4325 flow [2023-09-01 09:23:45,609 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1691 places, 1852 transitions, 4325 flow [2023-09-01 09:23:45,610 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:23:45,610 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1691 places, 1852 transitions, 4325 flow [2023-09-01 09:23:45,610 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1691 places, 1852 transitions, 4325 flow [2023-09-01 09:23:45,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1691 places, 1852 transitions, 4325 flow [2023-09-01 09:23:47,301 INFO L130 PetriNetUnfolder]: 231/2126 cut-off events. [2023-09-01 09:23:47,301 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-09-01 09:23:47,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2472 conditions, 2126 events. 231/2126 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 10988 event pairs, 0 based on Foata normal form. 0/1848 useless extension candidates. Maximal degree in co-relation 2335. Up to 48 conditions per place. [2023-09-01 09:23:48,147 INFO L119 LiptonReduction]: Number of co-enabled transitions 3164616 [2023-09-01 09:24:27,868 INFO L134 LiptonReduction]: Checked pairs total: 6441936 [2023-09-01 09:24:27,868 INFO L136 LiptonReduction]: Total number of compositions: 1478 [2023-09-01 09:24:27,870 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:24:27,870 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;@54bedb48, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:24:27,870 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:24:28,014 INFO L130 PetriNetUnfolder]: 147/741 cut-off events. [2023-09-01 09:24:28,014 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-09-01 09:24:28,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:24:28,014 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 09:24:28,014 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:24:28,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:24:28,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1237637143, now seen corresponding path program 1 times [2023-09-01 09:24:28,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:24:28,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494871376] [2023-09-01 09:24:28,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:24:28,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:24:28,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:24:28,065 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:24:28,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:24:28,117 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:24:28,117 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:24:28,117 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:24:28,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-09-01 09:24:28,118 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:24:28,118 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:24:28,118 WARN L233 ceAbstractionStarter]: 23 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:24:28,118 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 24 thread instances. [2023-09-01 09:24:28,343 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:24:28,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1763 places, 1931 transitions, 4534 flow [2023-09-01 09:24:30,030 INFO L130 PetriNetUnfolder]: 241/2217 cut-off events. [2023-09-01 09:24:30,031 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-09-01 09:24:30,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2590 conditions, 2217 events. 241/2217 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 11496 event pairs, 0 based on Foata normal form. 0/1927 useless extension candidates. Maximal degree in co-relation 2452. Up to 50 conditions per place. [2023-09-01 09:24:30,132 INFO L82 GeneralOperation]: Start removeDead. Operand has 1763 places, 1931 transitions, 4534 flow [2023-09-01 09:24:30,165 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1763 places, 1931 transitions, 4534 flow [2023-09-01 09:24:30,166 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:24:30,166 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1763 places, 1931 transitions, 4534 flow [2023-09-01 09:24:30,166 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1763 places, 1931 transitions, 4534 flow [2023-09-01 09:24:30,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1763 places, 1931 transitions, 4534 flow [2023-09-01 09:24:31,478 INFO L130 PetriNetUnfolder]: 241/2217 cut-off events. [2023-09-01 09:24:31,478 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-09-01 09:24:31,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2590 conditions, 2217 events. 241/2217 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 11496 event pairs, 0 based on Foata normal form. 0/1927 useless extension candidates. Maximal degree in co-relation 2452. Up to 50 conditions per place. [2023-09-01 09:24:32,297 INFO L119 LiptonReduction]: Number of co-enabled transitions 3450096 [2023-09-01 09:25:13,939 INFO L134 LiptonReduction]: Checked pairs total: 7116348 [2023-09-01 09:25:13,939 INFO L136 LiptonReduction]: Total number of compositions: 1545 [2023-09-01 09:25:13,940 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:25:13,941 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;@54bedb48, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:25:13,941 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:25:14,102 INFO L130 PetriNetUnfolder]: 155/777 cut-off events. [2023-09-01 09:25:14,102 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-09-01 09:25:14,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:25:14,103 INFO L208 CegarLoopForPetriNet]: trace histogram [25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:25:14,103 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:25:14,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:25:14,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1713990933, now seen corresponding path program 1 times [2023-09-01 09:25:14,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:25:14,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036280311] [2023-09-01 09:25:14,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:25:14,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:25:14,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:25:14,161 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:25:14,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:25:14,214 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:25:14,215 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:25:14,215 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:25:14,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-09-01 09:25:14,215 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:25:14,215 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:25:14,216 WARN L233 ceAbstractionStarter]: 24 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:25:14,216 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 25 thread instances. [2023-09-01 09:25:14,493 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:25:14,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1835 places, 2010 transitions, 4745 flow [2023-09-01 09:25:16,153 INFO L130 PetriNetUnfolder]: 251/2308 cut-off events. [2023-09-01 09:25:16,154 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-09-01 09:25:16,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2709 conditions, 2308 events. 251/2308 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 11993 event pairs, 0 based on Foata normal form. 0/2006 useless extension candidates. Maximal degree in co-relation 2570. Up to 52 conditions per place. [2023-09-01 09:25:16,259 INFO L82 GeneralOperation]: Start removeDead. Operand has 1835 places, 2010 transitions, 4745 flow [2023-09-01 09:25:16,294 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1835 places, 2010 transitions, 4745 flow [2023-09-01 09:25:16,294 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:25:16,294 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1835 places, 2010 transitions, 4745 flow [2023-09-01 09:25:16,295 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1835 places, 2010 transitions, 4745 flow [2023-09-01 09:25:16,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1835 places, 2010 transitions, 4745 flow [2023-09-01 09:25:17,797 INFO L130 PetriNetUnfolder]: 251/2308 cut-off events. [2023-09-01 09:25:17,797 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-09-01 09:25:17,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2709 conditions, 2308 events. 251/2308 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 11993 event pairs, 0 based on Foata normal form. 0/2006 useless extension candidates. Maximal degree in co-relation 2570. Up to 52 conditions per place. [2023-09-01 09:25:18,602 INFO L119 LiptonReduction]: Number of co-enabled transitions 3747900 [2023-09-01 09:26:03,432 INFO L134 LiptonReduction]: Checked pairs total: 7669208 [2023-09-01 09:26:03,432 INFO L136 LiptonReduction]: Total number of compositions: 1604 [2023-09-01 09:26:03,434 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:26:03,434 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;@54bedb48, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:26:03,435 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:26:03,684 INFO L130 PetriNetUnfolder]: 161/811 cut-off events. [2023-09-01 09:26:03,685 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-09-01 09:26:03,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:26:03,685 INFO L208 CegarLoopForPetriNet]: trace histogram [26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:26:03,685 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:26:03,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:26:03,688 INFO L85 PathProgramCache]: Analyzing trace with hash 782955840, now seen corresponding path program 1 times [2023-09-01 09:26:03,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:26:03,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224764254] [2023-09-01 09:26:03,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:26:03,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:26:03,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:26:03,771 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:26:03,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:26:03,848 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:26:03,848 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:26:03,848 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:26:03,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-09-01 09:26:03,849 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:26:03,849 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:26:03,849 WARN L233 ceAbstractionStarter]: 25 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:26:03,849 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 26 thread instances. [2023-09-01 09:26:04,128 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:26:04,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1907 places, 2089 transitions, 4958 flow [2023-09-01 09:26:05,825 INFO L130 PetriNetUnfolder]: 261/2399 cut-off events. [2023-09-01 09:26:05,825 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-09-01 09:26:05,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2829 conditions, 2399 events. 261/2399 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 12492 event pairs, 0 based on Foata normal form. 0/2085 useless extension candidates. Maximal degree in co-relation 2689. Up to 54 conditions per place. [2023-09-01 09:26:05,947 INFO L82 GeneralOperation]: Start removeDead. Operand has 1907 places, 2089 transitions, 4958 flow [2023-09-01 09:26:05,988 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1907 places, 2089 transitions, 4958 flow [2023-09-01 09:26:05,988 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:26:05,989 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1907 places, 2089 transitions, 4958 flow [2023-09-01 09:26:05,989 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1907 places, 2089 transitions, 4958 flow [2023-09-01 09:26:05,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1907 places, 2089 transitions, 4958 flow [2023-09-01 09:26:07,610 INFO L130 PetriNetUnfolder]: 261/2399 cut-off events. [2023-09-01 09:26:07,611 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-09-01 09:26:07,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2829 conditions, 2399 events. 261/2399 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 12492 event pairs, 0 based on Foata normal form. 0/2085 useless extension candidates. Maximal degree in co-relation 2689. Up to 54 conditions per place. [2023-09-01 09:26:08,465 INFO L119 LiptonReduction]: Number of co-enabled transitions 4058028 [2023-09-01 09:26:55,108 INFO L134 LiptonReduction]: Checked pairs total: 9032144 [2023-09-01 09:26:55,108 INFO L136 LiptonReduction]: Total number of compositions: 1674 [2023-09-01 09:26:55,110 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:26:55,110 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@54bedb48, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:26:55,110 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:26:55,295 INFO L130 PetriNetUnfolder]: 168/844 cut-off events. [2023-09-01 09:26:55,295 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-09-01 09:26:55,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:26:55,295 INFO L208 CegarLoopForPetriNet]: trace histogram [27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:26:55,296 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:26:55,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:26:55,296 INFO L85 PathProgramCache]: Analyzing trace with hash -376605358, now seen corresponding path program 1 times [2023-09-01 09:26:55,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:26:55,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148784870] [2023-09-01 09:26:55,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:26:55,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:26:55,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:26:55,367 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:26:55,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:26:55,429 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:26:55,429 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:26:55,429 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:26:55,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-09-01 09:26:55,430 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:26:55,430 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:26:55,430 WARN L233 ceAbstractionStarter]: 26 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:26:55,430 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 27 thread instances. [2023-09-01 09:26:55,763 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:26:55,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1979 places, 2168 transitions, 5173 flow [2023-09-01 09:26:57,666 INFO L130 PetriNetUnfolder]: 271/2490 cut-off events. [2023-09-01 09:26:57,666 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-09-01 09:26:57,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2950 conditions, 2490 events. 271/2490 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 13032 event pairs, 0 based on Foata normal form. 0/2164 useless extension candidates. Maximal degree in co-relation 2809. Up to 56 conditions per place. [2023-09-01 09:26:57,801 INFO L82 GeneralOperation]: Start removeDead. Operand has 1979 places, 2168 transitions, 5173 flow [2023-09-01 09:26:57,867 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1979 places, 2168 transitions, 5173 flow [2023-09-01 09:26:57,867 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:26:57,867 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1979 places, 2168 transitions, 5173 flow [2023-09-01 09:26:57,867 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1979 places, 2168 transitions, 5173 flow [2023-09-01 09:26:57,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1979 places, 2168 transitions, 5173 flow [2023-09-01 09:26:59,713 INFO L130 PetriNetUnfolder]: 271/2490 cut-off events. [2023-09-01 09:26:59,714 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-09-01 09:26:59,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2950 conditions, 2490 events. 271/2490 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 13032 event pairs, 0 based on Foata normal form. 0/2164 useless extension candidates. Maximal degree in co-relation 2809. Up to 56 conditions per place. [2023-09-01 09:27:00,613 INFO L119 LiptonReduction]: Number of co-enabled transitions 4380480 Killed by 15