./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dce9d71ca8bbe247a74e6b2653e5cdb882c6b8b5d902edf534df70d90ee806fe --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 06:58:27,177 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 06:58:27,180 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 06:58:27,213 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 06:58:27,216 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 06:58:27,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 06:58:27,222 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 06:58:27,225 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 06:58:27,227 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 06:58:27,234 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 06:58:27,235 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 06:58:27,237 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 06:58:27,238 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 06:58:27,240 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 06:58:27,243 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 06:58:27,248 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 06:58:27,250 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 06:58:27,251 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 06:58:27,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 06:58:27,266 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 06:58:27,270 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 06:58:27,271 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 06:58:27,272 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 06:58:27,272 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 06:58:27,276 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 06:58:27,276 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 06:58:27,277 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 06:58:27,279 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 06:58:27,280 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 06:58:27,280 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 06:58:27,281 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 06:58:27,282 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 06:58:27,284 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 06:58:27,285 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 06:58:27,286 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 06:58:27,286 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 06:58:27,286 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 06:58:27,287 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 06:58:27,287 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 06:58:27,288 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 06:58:27,288 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 06:58:27,290 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-09-01 06:58:27,333 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 06:58:27,333 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 06:58:27,334 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 06:58:27,334 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 06:58:27,335 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 06:58:27,335 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 06:58:27,336 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 06:58:27,336 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 06:58:27,336 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 06:58:27,337 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 06:58:27,337 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 06:58:27,338 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 06:58:27,338 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 06:58:27,338 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 06:58:27,338 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 06:58:27,338 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 06:58:27,339 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 06:58:27,339 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 06:58:27,339 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-09-01 06:58:27,339 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 06:58:27,339 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 06:58:27,340 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 06:58:27,340 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 06:58:27,340 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 06:58:27,340 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 06:58:27,341 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 06:58:27,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 06:58:27,341 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 06:58:27,341 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 06:58:27,341 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 06:58:27,342 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 06:58:27,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 06:58:27,342 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 06:58:27,342 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 06:58:27,343 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 06:58:27,343 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 06:58:27,343 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 06:58:27,343 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dce9d71ca8bbe247a74e6b2653e5cdb882c6b8b5d902edf534df70d90ee806fe Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 06:58:27,691 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 06:58:27,722 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 06:58:27,724 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 06:58:27,725 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 06:58:27,726 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 06:58:27,727 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2023-09-01 06:58:28,921 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 06:58:29,228 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 06:58:29,228 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2023-09-01 06:58:29,244 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f34a083b/cd068d5c473d4bee972f46c153c7ac63/FLAGe9067172f [2023-09-01 06:58:29,261 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f34a083b/cd068d5c473d4bee972f46c153c7ac63 [2023-09-01 06:58:29,264 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 06:58:29,266 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 06:58:29,267 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 06:58:29,267 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 06:58:29,270 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 06:58:29,271 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 06:58:29" (1/1) ... [2023-09-01 06:58:29,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a382ed5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:58:29, skipping insertion in model container [2023-09-01 06:58:29,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 06:58:29" (1/1) ... [2023-09-01 06:58:29,278 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 06:58:29,317 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 06:58:29,708 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i[41323,41336] [2023-09-01 06:58:29,738 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 06:58:29,755 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 06:58:29,785 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i[41323,41336] [2023-09-01 06:58:29,802 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 06:58:29,927 INFO L208 MainTranslator]: Completed translation [2023-09-01 06:58:29,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:58:29 WrapperNode [2023-09-01 06:58:29,928 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 06:58:29,929 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 06:58:29,929 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 06:58:29,929 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 06:58:29,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:58:29" (1/1) ... [2023-09-01 06:58:29,967 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:58:29" (1/1) ... [2023-09-01 06:58:30,006 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 209 [2023-09-01 06:58:30,007 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 06:58:30,009 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 06:58:30,009 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 06:58:30,010 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 06:58:30,017 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:58:29" (1/1) ... [2023-09-01 06:58:30,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:58:29" (1/1) ... [2023-09-01 06:58:30,035 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:58:29" (1/1) ... [2023-09-01 06:58:30,041 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:58:29" (1/1) ... [2023-09-01 06:58:30,048 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:58:29" (1/1) ... [2023-09-01 06:58:30,062 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:58:29" (1/1) ... [2023-09-01 06:58:30,063 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:58:29" (1/1) ... [2023-09-01 06:58:30,070 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:58:29" (1/1) ... [2023-09-01 06:58:30,072 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 06:58:30,077 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 06:58:30,077 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 06:58:30,078 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 06:58:30,078 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:58:29" (1/1) ... [2023-09-01 06:58:30,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 06:58:30,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:58:30,109 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 06:58:30,132 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 06:58:30,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 06:58:30,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 06:58:30,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 06:58:30,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 06:58:30,162 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 06:58:30,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 06:58:30,162 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-09-01 06:58:30,163 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-09-01 06:58:30,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 06:58:30,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 06:58:30,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 06:58:30,165 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 06:58:30,373 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 06:58:30,375 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 06:58:30,745 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 06:58:30,755 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 06:58:30,755 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-09-01 06:58:30,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 06:58:30 BoogieIcfgContainer [2023-09-01 06:58:30,758 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 06:58:30,761 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 06:58:30,762 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 06:58:30,765 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 06:58:30,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 06:58:29" (1/3) ... [2023-09-01 06:58:30,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34e7ae0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 06:58:30, skipping insertion in model container [2023-09-01 06:58:30,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:58:29" (2/3) ... [2023-09-01 06:58:30,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34e7ae0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 06:58:30, skipping insertion in model container [2023-09-01 06:58:30,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 06:58:30" (3/3) ... [2023-09-01 06:58:30,769 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_77-tricky_address4_racing.i [2023-09-01 06:58:30,777 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 06:58:30,785 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 06:58:30,786 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-09-01 06:58:30,786 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 06:58:30,902 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-09-01 06:58:30,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 223 transitions, 454 flow [2023-09-01 06:58:31,088 INFO L130 PetriNetUnfolder]: 45/300 cut-off events. [2023-09-01 06:58:31,089 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2023-09-01 06:58:31,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306 conditions, 300 events. 45/300 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 961 event pairs, 0 based on Foata normal form. 0/232 useless extension candidates. Maximal degree in co-relation 168. Up to 8 conditions per place. [2023-09-01 06:58:31,100 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 223 transitions, 454 flow [2023-09-01 06:58:31,112 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 185 places, 212 transitions, 429 flow [2023-09-01 06:58:31,116 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:58:31,135 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 185 places, 212 transitions, 429 flow [2023-09-01 06:58:31,143 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 185 places, 212 transitions, 429 flow [2023-09-01 06:58:31,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 185 places, 212 transitions, 429 flow [2023-09-01 06:58:31,200 INFO L130 PetriNetUnfolder]: 44/289 cut-off events. [2023-09-01 06:58:31,200 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 06:58:31,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294 conditions, 289 events. 44/289 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 919 event pairs, 0 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 168. Up to 8 conditions per place. [2023-09-01 06:58:31,215 INFO L119 LiptonReduction]: Number of co-enabled transitions 14268 [2023-09-01 06:58:34,869 INFO L134 LiptonReduction]: Checked pairs total: 24341 [2023-09-01 06:58:34,870 INFO L136 LiptonReduction]: Total number of compositions: 193 [2023-09-01 06:58:34,883 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:58:34,889 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;@30096601, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:58:34,889 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:58:34,896 INFO L130 PetriNetUnfolder]: 11/46 cut-off events. [2023-09-01 06:58:34,896 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 06:58:34,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:58:34,897 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-09-01 06:58:34,897 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:58:34,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:58:34,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1187167665, now seen corresponding path program 1 times [2023-09-01 06:58:34,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:58:34,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794997876] [2023-09-01 06:58:34,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:58:34,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:58:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:58:35,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 06:58:35,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:58:35,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794997876] [2023-09-01 06:58:35,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794997876] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 06:58:35,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 06:58:35,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 06:58:35,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112169671] [2023-09-01 06:58:35,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 06:58:35,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 06:58:35,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:58:35,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 06:58:35,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 06:58:35,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 416 [2023-09-01 06:58:35,242 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 77 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:35,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:58:35,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 416 [2023-09-01 06:58:35,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:58:35,430 INFO L130 PetriNetUnfolder]: 498/1040 cut-off events. [2023-09-01 06:58:35,431 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 06:58:35,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2027 conditions, 1040 events. 498/1040 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5634 event pairs, 456 based on Foata normal form. 113/838 useless extension candidates. Maximal degree in co-relation 1965. Up to 981 conditions per place. [2023-09-01 06:58:35,436 INFO L137 encePairwiseOnDemand]: 389/416 looper letters, 27 selfloop transitions, 2 changer transitions 22/54 dead transitions. [2023-09-01 06:58:35,437 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 54 transitions, 209 flow [2023-09-01 06:58:35,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 06:58:35,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 06:58:35,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 637 transitions. [2023-09-01 06:58:35,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2023-09-01 06:58:35,456 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 637 transitions. [2023-09-01 06:58:35,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 637 transitions. [2023-09-01 06:58:35,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:58:35,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 637 transitions. [2023-09-01 06:58:35,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:35,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 416.0) internal successors, (1664), 4 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:35,472 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 416.0) internal successors, (1664), 4 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:35,474 INFO L175 Difference]: Start difference. First operand has 55 places, 77 transitions, 159 flow. Second operand 3 states and 637 transitions. [2023-09-01 06:58:35,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 54 transitions, 209 flow [2023-09-01 06:58:35,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 54 transitions, 209 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 06:58:35,480 INFO L231 Difference]: Finished difference. Result has 56 places, 32 transitions, 79 flow [2023-09-01 06:58:35,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=416, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=56, PETRI_TRANSITIONS=32} [2023-09-01 06:58:35,486 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 1 predicate places. [2023-09-01 06:58:35,486 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 32 transitions, 79 flow [2023-09-01 06:58:35,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:35,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:58:35,487 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-09-01 06:58:35,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 06:58:35,488 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:58:35,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:58:35,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1654270165, now seen corresponding path program 1 times [2023-09-01 06:58:35,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:58:35,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184920654] [2023-09-01 06:58:35,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:58:35,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:58:35,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:58:35,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 06:58:35,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:58:35,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184920654] [2023-09-01 06:58:35,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184920654] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 06:58:35,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772661098] [2023-09-01 06:58:35,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:58:35,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:58:35,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:58:35,613 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 06:58:35,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 06:58:35,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:58:35,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 06:58:35,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 06:58:35,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 06:58:35,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 06:58:35,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 06:58:35,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772661098] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 06:58:35,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 06:58:35,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 06:58:35,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092508093] [2023-09-01 06:58:35,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 06:58:35,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 06:58:35,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:58:35,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 06:58:35,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 06:58:35,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 416 [2023-09-01 06:58:35,854 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 32 transitions, 79 flow. Second operand has 7 states, 7 states have (on average 188.57142857142858) internal successors, (1320), 7 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:35,854 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:58:35,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 416 [2023-09-01 06:58:35,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:58:35,934 INFO L130 PetriNetUnfolder]: 102/237 cut-off events. [2023-09-01 06:58:35,934 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 06:58:35,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 477 conditions, 237 events. 102/237 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 851 event pairs, 95 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 465. Up to 221 conditions per place. [2023-09-01 06:58:35,935 INFO L137 encePairwiseOnDemand]: 413/416 looper letters, 27 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2023-09-01 06:58:35,936 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 155 flow [2023-09-01 06:58:35,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 06:58:35,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 06:58:35,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1157 transitions. [2023-09-01 06:58:35,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4635416666666667 [2023-09-01 06:58:35,939 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1157 transitions. [2023-09-01 06:58:35,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1157 transitions. [2023-09-01 06:58:35,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:58:35,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1157 transitions. [2023-09-01 06:58:35,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 192.83333333333334) internal successors, (1157), 6 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:35,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 416.0) internal successors, (2912), 7 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:35,948 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 416.0) internal successors, (2912), 7 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:35,948 INFO L175 Difference]: Start difference. First operand has 56 places, 32 transitions, 79 flow. Second operand 6 states and 1157 transitions. [2023-09-01 06:58:35,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 155 flow [2023-09-01 06:58:35,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 35 transitions, 151 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 06:58:35,950 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 111 flow [2023-09-01 06:58:35,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=416, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=111, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2023-09-01 06:58:35,951 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -13 predicate places. [2023-09-01 06:58:35,951 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 111 flow [2023-09-01 06:58:35,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 188.57142857142858) internal successors, (1320), 7 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:35,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:58:35,952 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-09-01 06:58:35,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 06:58:36,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:58:36,157 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:58:36,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:58:36,158 INFO L85 PathProgramCache]: Analyzing trace with hash -920020657, now seen corresponding path program 2 times [2023-09-01 06:58:36,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:58:36,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637856724] [2023-09-01 06:58:36,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:58:36,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:58:36,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:58:36,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 06:58:36,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:58:36,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637856724] [2023-09-01 06:58:36,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637856724] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 06:58:36,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161211033] [2023-09-01 06:58:36,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 06:58:36,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:58:36,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:58:36,305 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 06:58:36,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 06:58:36,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 06:58:36,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 06:58:36,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 06:58:36,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 06:58:36,416 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 06:58:36,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 06:58:36,475 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 06:58:36,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161211033] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 06:58:36,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 06:58:36,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 06:58:36,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921200267] [2023-09-01 06:58:36,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 06:58:36,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 06:58:36,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:58:36,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 06:58:36,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 06:58:36,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 416 [2023-09-01 06:58:36,529 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 111 flow. Second operand has 13 states, 13 states have (on average 188.30769230769232) internal successors, (2448), 13 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:36,529 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:58:36,529 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 416 [2023-09-01 06:58:36,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:58:36,639 INFO L130 PetriNetUnfolder]: 102/243 cut-off events. [2023-09-01 06:58:36,639 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-09-01 06:58:36,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 514 conditions, 243 events. 102/243 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 851 event pairs, 95 based on Foata normal form. 6/158 useless extension candidates. Maximal degree in co-relation 456. Up to 221 conditions per place. [2023-09-01 06:58:36,640 INFO L137 encePairwiseOnDemand]: 413/416 looper letters, 27 selfloop transitions, 11 changer transitions 0/41 dead transitions. [2023-09-01 06:58:36,640 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 41 transitions, 223 flow [2023-09-01 06:58:36,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 06:58:36,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 06:58:36,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2288 transitions. [2023-09-01 06:58:36,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2023-09-01 06:58:36,647 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2288 transitions. [2023-09-01 06:58:36,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2288 transitions. [2023-09-01 06:58:36,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:58:36,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2288 transitions. [2023-09-01 06:58:36,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 190.66666666666666) internal successors, (2288), 12 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:36,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 416.0) internal successors, (5408), 13 states have internal predecessors, (5408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:36,664 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 416.0) internal successors, (5408), 13 states have internal predecessors, (5408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:36,665 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 111 flow. Second operand 12 states and 2288 transitions. [2023-09-01 06:58:36,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 41 transitions, 223 flow [2023-09-01 06:58:36,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 41 transitions, 209 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 06:58:36,667 INFO L231 Difference]: Finished difference. Result has 58 places, 41 transitions, 181 flow [2023-09-01 06:58:36,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=416, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=41} [2023-09-01 06:58:36,668 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 3 predicate places. [2023-09-01 06:58:36,668 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 41 transitions, 181 flow [2023-09-01 06:58:36,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 188.30769230769232) internal successors, (2448), 13 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:36,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:58:36,670 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-09-01 06:58:36,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 06:58:36,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-09-01 06:58:36,876 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:58:36,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:58:36,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1315861553, now seen corresponding path program 3 times [2023-09-01 06:58:36,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:58:36,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077109217] [2023-09-01 06:58:36,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:58:36,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:58:36,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:58:36,910 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:58:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:58:36,966 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:58:36,966 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:58:36,967 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:58:36,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 06:58:36,969 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 06:58:36,971 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:58:36,972 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:58:36,972 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 06:58:37,010 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 06:58:37,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 267 places, 307 transitions, 632 flow [2023-09-01 06:58:37,095 INFO L130 PetriNetUnfolder]: 75/497 cut-off events. [2023-09-01 06:58:37,096 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-09-01 06:58:37,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 511 conditions, 497 events. 75/497 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2021 event pairs, 0 based on Foata normal form. 0/382 useless extension candidates. Maximal degree in co-relation 302. Up to 12 conditions per place. [2023-09-01 06:58:37,100 INFO L82 GeneralOperation]: Start removeDead. Operand has 267 places, 307 transitions, 632 flow [2023-09-01 06:58:37,103 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 265 places, 305 transitions, 628 flow [2023-09-01 06:58:37,103 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:58:37,104 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 265 places, 305 transitions, 628 flow [2023-09-01 06:58:37,104 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 265 places, 305 transitions, 628 flow [2023-09-01 06:58:37,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 265 places, 305 transitions, 628 flow [2023-09-01 06:58:37,156 INFO L130 PetriNetUnfolder]: 75/495 cut-off events. [2023-09-01 06:58:37,156 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-09-01 06:58:37,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 509 conditions, 495 events. 75/495 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2013 event pairs, 0 based on Foata normal form. 0/382 useless extension candidates. Maximal degree in co-relation 300. Up to 12 conditions per place. [2023-09-01 06:58:37,185 INFO L119 LiptonReduction]: Number of co-enabled transitions 45100 [2023-09-01 06:58:41,402 INFO L134 LiptonReduction]: Checked pairs total: 79232 [2023-09-01 06:58:41,403 INFO L136 LiptonReduction]: Total number of compositions: 269 [2023-09-01 06:58:41,405 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:58:41,406 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;@30096601, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:58:41,406 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:58:41,415 INFO L130 PetriNetUnfolder]: 38/132 cut-off events. [2023-09-01 06:58:41,416 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 06:58:41,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:58:41,416 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 06:58:41,416 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:58:41,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:58:41,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1111304713, now seen corresponding path program 1 times [2023-09-01 06:58:41,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:58:41,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325288241] [2023-09-01 06:58:41,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:58:41,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:58:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:58:41,468 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 06:58:41,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:58:41,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325288241] [2023-09-01 06:58:41,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325288241] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 06:58:41,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 06:58:41,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 06:58:41,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490538370] [2023-09-01 06:58:41,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 06:58:41,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 06:58:41,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:58:41,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 06:58:41,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 06:58:41,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 576 [2023-09-01 06:58:41,482 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 117 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:41,482 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:58:41,482 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 576 [2023-09-01 06:58:41,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:58:43,967 INFO L130 PetriNetUnfolder]: 19341/29803 cut-off events. [2023-09-01 06:58:43,967 INFO L131 PetriNetUnfolder]: For 136/136 co-relation queries the response was YES. [2023-09-01 06:58:44,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58384 conditions, 29803 events. 19341/29803 cut-off events. For 136/136 co-relation queries the response was YES. Maximal size of possible extension queue 1068. Compared 210941 event pairs, 18264 based on Foata normal form. 3745/24741 useless extension candidates. Maximal degree in co-relation 34945. Up to 28465 conditions per place. [2023-09-01 06:58:44,065 INFO L137 encePairwiseOnDemand]: 538/576 looper letters, 46 selfloop transitions, 2 changer transitions 28/83 dead transitions. [2023-09-01 06:58:44,065 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 83 transitions, 328 flow [2023-09-01 06:58:44,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 06:58:44,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 06:58:44,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 879 transitions. [2023-09-01 06:58:44,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5086805555555556 [2023-09-01 06:58:44,068 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 879 transitions. [2023-09-01 06:58:44,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 879 transitions. [2023-09-01 06:58:44,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:58:44,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 879 transitions. [2023-09-01 06:58:44,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 293.0) internal successors, (879), 3 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:44,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 576.0) internal successors, (2304), 4 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:44,075 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 576.0) internal successors, (2304), 4 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:44,075 INFO L175 Difference]: Start difference. First operand has 85 places, 117 transitions, 252 flow. Second operand 3 states and 879 transitions. [2023-09-01 06:58:44,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 83 transitions, 328 flow [2023-09-01 06:58:44,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 83 transitions, 328 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 06:58:44,081 INFO L231 Difference]: Finished difference. Result has 84 places, 55 transitions, 132 flow [2023-09-01 06:58:44,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=576, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=84, PETRI_TRANSITIONS=55} [2023-09-01 06:58:44,083 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, -1 predicate places. [2023-09-01 06:58:44,083 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 55 transitions, 132 flow [2023-09-01 06:58:44,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:44,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:58:44,084 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-09-01 06:58:44,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 06:58:44,086 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:58:44,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:58:44,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1399516395, now seen corresponding path program 1 times [2023-09-01 06:58:44,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:58:44,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541942734] [2023-09-01 06:58:44,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:58:44,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:58:44,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:58:44,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 06:58:44,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:58:44,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541942734] [2023-09-01 06:58:44,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541942734] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 06:58:44,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425504745] [2023-09-01 06:58:44,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:58:44,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:58:44,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:58:44,142 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 06:58:44,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 06:58:44,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:58:44,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 06:58:44,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 06:58:44,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 06:58:44,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 06:58:44,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 06:58:44,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425504745] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 06:58:44,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 06:58:44,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 06:58:44,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546625285] [2023-09-01 06:58:44,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 06:58:44,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 06:58:44,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:58:44,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 06:58:44,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 06:58:44,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 576 [2023-09-01 06:58:44,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 55 transitions, 132 flow. Second operand has 7 states, 7 states have (on average 257.7142857142857) internal successors, (1804), 7 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:44,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:58:44,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 576 [2023-09-01 06:58:44,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:58:44,840 INFO L130 PetriNetUnfolder]: 4260/6747 cut-off events. [2023-09-01 06:58:44,841 INFO L131 PetriNetUnfolder]: For 61/61 co-relation queries the response was YES. [2023-09-01 06:58:44,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13290 conditions, 6747 events. 4260/6747 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 42334 event pairs, 4055 based on Foata normal form. 0/4336 useless extension candidates. Maximal degree in co-relation 13277. Up to 6455 conditions per place. [2023-09-01 06:58:44,869 INFO L137 encePairwiseOnDemand]: 573/576 looper letters, 46 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2023-09-01 06:58:44,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 58 transitions, 246 flow [2023-09-01 06:58:44,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 06:58:44,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 06:58:44,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1590 transitions. [2023-09-01 06:58:44,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4600694444444444 [2023-09-01 06:58:44,874 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1590 transitions. [2023-09-01 06:58:44,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1590 transitions. [2023-09-01 06:58:44,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:58:44,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1590 transitions. [2023-09-01 06:58:44,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:44,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 576.0) internal successors, (4032), 7 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:44,883 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 576.0) internal successors, (4032), 7 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:44,883 INFO L175 Difference]: Start difference. First operand has 84 places, 55 transitions, 132 flow. Second operand 6 states and 1590 transitions. [2023-09-01 06:58:44,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 58 transitions, 246 flow [2023-09-01 06:58:44,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 58 transitions, 240 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 06:58:44,950 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 162 flow [2023-09-01 06:58:44,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=576, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=162, PETRI_PLACES=66, PETRI_TRANSITIONS=58} [2023-09-01 06:58:44,951 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, -19 predicate places. [2023-09-01 06:58:44,951 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 162 flow [2023-09-01 06:58:44,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 257.7142857142857) internal successors, (1804), 7 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:44,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:58:44,952 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 06:58:44,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 06:58:45,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:58:45,153 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:58:45,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:58:45,154 INFO L85 PathProgramCache]: Analyzing trace with hash -225774857, now seen corresponding path program 2 times [2023-09-01 06:58:45,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:58:45,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869709102] [2023-09-01 06:58:45,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:58:45,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:58:45,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:58:45,225 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 06:58:45,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:58:45,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869709102] [2023-09-01 06:58:45,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869709102] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 06:58:45,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067066881] [2023-09-01 06:58:45,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 06:58:45,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:58:45,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:58:45,227 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 06:58:45,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 06:58:45,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 06:58:45,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 06:58:45,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 06:58:45,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 06:58:45,332 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 06:58:45,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 06:58:45,383 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 06:58:45,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067066881] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 06:58:45,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 06:58:45,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 06:58:45,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375321838] [2023-09-01 06:58:45,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 06:58:45,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 06:58:45,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:58:45,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 06:58:45,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 06:58:45,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 576 [2023-09-01 06:58:45,422 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 162 flow. Second operand has 13 states, 13 states have (on average 257.38461538461536) internal successors, (3346), 13 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:45,422 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:58:45,422 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 576 [2023-09-01 06:58:45,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:58:46,014 INFO L130 PetriNetUnfolder]: 4260/6753 cut-off events. [2023-09-01 06:58:46,014 INFO L131 PetriNetUnfolder]: For 75/75 co-relation queries the response was YES. [2023-09-01 06:58:46,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13321 conditions, 6753 events. 4260/6753 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 42324 event pairs, 4055 based on Foata normal form. 6/4349 useless extension candidates. Maximal degree in co-relation 13262. Up to 6455 conditions per place. [2023-09-01 06:58:46,047 INFO L137 encePairwiseOnDemand]: 573/576 looper letters, 46 selfloop transitions, 11 changer transitions 0/64 dead transitions. [2023-09-01 06:58:46,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 64 transitions, 312 flow [2023-09-01 06:58:46,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 06:58:46,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 06:58:46,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3135 transitions. [2023-09-01 06:58:46,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4535590277777778 [2023-09-01 06:58:46,057 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3135 transitions. [2023-09-01 06:58:46,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3135 transitions. [2023-09-01 06:58:46,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:58:46,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3135 transitions. [2023-09-01 06:58:46,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 261.25) internal successors, (3135), 12 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:46,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 576.0) internal successors, (7488), 13 states have internal predecessors, (7488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:46,077 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 576.0) internal successors, (7488), 13 states have internal predecessors, (7488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:46,077 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 162 flow. Second operand 12 states and 3135 transitions. [2023-09-01 06:58:46,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 64 transitions, 312 flow [2023-09-01 06:58:46,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 64 transitions, 298 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 06:58:46,080 INFO L231 Difference]: Finished difference. Result has 82 places, 64 transitions, 232 flow [2023-09-01 06:58:46,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=576, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=232, PETRI_PLACES=82, PETRI_TRANSITIONS=64} [2023-09-01 06:58:46,082 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, -3 predicate places. [2023-09-01 06:58:46,082 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 64 transitions, 232 flow [2023-09-01 06:58:46,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 257.38461538461536) internal successors, (3346), 13 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:46,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:58:46,085 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 06:58:46,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 06:58:46,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:58:46,291 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:58:46,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:58:46,292 INFO L85 PathProgramCache]: Analyzing trace with hash 695791223, now seen corresponding path program 3 times [2023-09-01 06:58:46,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:58:46,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357197651] [2023-09-01 06:58:46,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:58:46,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:58:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:58:46,324 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:58:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:58:46,345 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:58:46,346 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:58:46,346 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:58:46,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 06:58:46,346 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 06:58:46,347 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:58:46,347 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:58:46,347 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-09-01 06:58:46,388 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 06:58:46,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 339 places, 391 transitions, 812 flow [2023-09-01 06:58:46,531 INFO L130 PetriNetUnfolder]: 110/733 cut-off events. [2023-09-01 06:58:46,531 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-09-01 06:58:46,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 761 conditions, 733 events. 110/733 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3303 event pairs, 1 based on Foata normal form. 0/563 useless extension candidates. Maximal degree in co-relation 505. Up to 16 conditions per place. [2023-09-01 06:58:46,548 INFO L82 GeneralOperation]: Start removeDead. Operand has 339 places, 391 transitions, 812 flow [2023-09-01 06:58:46,556 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 337 places, 389 transitions, 808 flow [2023-09-01 06:58:46,556 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:58:46,557 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 337 places, 389 transitions, 808 flow [2023-09-01 06:58:46,557 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 337 places, 389 transitions, 808 flow [2023-09-01 06:58:46,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 337 places, 389 transitions, 808 flow [2023-09-01 06:58:46,691 INFO L130 PetriNetUnfolder]: 110/731 cut-off events. [2023-09-01 06:58:46,691 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-09-01 06:58:46,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 759 conditions, 731 events. 110/731 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3297 event pairs, 1 based on Foata normal form. 0/563 useless extension candidates. Maximal degree in co-relation 503. Up to 16 conditions per place. [2023-09-01 06:58:46,749 INFO L119 LiptonReduction]: Number of co-enabled transitions 88560 [2023-09-01 06:58:51,551 INFO L134 LiptonReduction]: Checked pairs total: 155413 [2023-09-01 06:58:51,552 INFO L136 LiptonReduction]: Total number of compositions: 346 [2023-09-01 06:58:51,554 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:58:51,554 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@30096601, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:58:51,555 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:58:51,571 INFO L130 PetriNetUnfolder]: 59/201 cut-off events. [2023-09-01 06:58:51,572 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 06:58:51,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:58:51,572 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 06:58:51,572 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:58:51,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:58:51,573 INFO L85 PathProgramCache]: Analyzing trace with hash 870722083, now seen corresponding path program 1 times [2023-09-01 06:58:51,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:58:51,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950446950] [2023-09-01 06:58:51,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:58:51,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:58:51,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:58:51,620 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 06:58:51,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:58:51,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950446950] [2023-09-01 06:58:51,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950446950] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 06:58:51,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 06:58:51,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 06:58:51,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754099631] [2023-09-01 06:58:51,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 06:58:51,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 06:58:51,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:58:51,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 06:58:51,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 06:58:51,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 737 [2023-09-01 06:58:51,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 152 transitions, 334 flow. Second operand has 3 states, 3 states have (on average 328.3333333333333) internal successors, (985), 3 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:58:51,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:58:51,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 737 [2023-09-01 06:58:51,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:59:37,912 INFO L130 PetriNetUnfolder]: 502526/697269 cut-off events. [2023-09-01 06:59:37,912 INFO L131 PetriNetUnfolder]: For 4983/4983 co-relation queries the response was YES. [2023-09-01 06:59:39,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1359259 conditions, 697269 events. 502526/697269 cut-off events. For 4983/4983 co-relation queries the response was YES. Maximal size of possible extension queue 20829. Compared 5918545 event pairs, 481563 based on Foata normal form. 113160/604926 useless extension candidates. Maximal degree in co-relation 82730. Up to 658990 conditions per place. [2023-09-01 06:59:39,992 INFO L137 encePairwiseOnDemand]: 687/737 looper letters, 63 selfloop transitions, 2 changer transitions 29/106 dead transitions. [2023-09-01 06:59:39,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 106 transitions, 422 flow [2023-09-01 06:59:39,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 06:59:39,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 06:59:39,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1116 transitions. [2023-09-01 06:59:39,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047489823609227 [2023-09-01 06:59:39,997 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1116 transitions. [2023-09-01 06:59:39,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1116 transitions. [2023-09-01 06:59:39,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:59:39,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1116 transitions. [2023-09-01 06:59:40,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 372.0) internal successors, (1116), 3 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:59:40,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 737.0) internal successors, (2948), 4 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:59:40,017 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 737.0) internal successors, (2948), 4 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:59:40,017 INFO L175 Difference]: Start difference. First operand has 110 places, 152 transitions, 334 flow. Second operand 3 states and 1116 transitions. [2023-09-01 06:59:40,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 106 transitions, 422 flow [2023-09-01 06:59:40,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 106 transitions, 422 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 06:59:40,023 INFO L231 Difference]: Finished difference. Result has 107 places, 77 transitions, 185 flow [2023-09-01 06:59:40,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=737, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=185, PETRI_PLACES=107, PETRI_TRANSITIONS=77} [2023-09-01 06:59:40,025 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -3 predicate places. [2023-09-01 06:59:40,025 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 77 transitions, 185 flow [2023-09-01 06:59:40,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 328.3333333333333) internal successors, (985), 3 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:59:40,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:59:40,026 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:59:40,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 06:59:40,027 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:59:40,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:59:40,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1195216674, now seen corresponding path program 1 times [2023-09-01 06:59:40,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:59:40,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438617320] [2023-09-01 06:59:40,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:59:40,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:59:40,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:59:40,071 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 06:59:40,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:59:40,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438617320] [2023-09-01 06:59:40,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438617320] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 06:59:40,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589636639] [2023-09-01 06:59:40,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:59:40,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:59:40,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:59:40,416 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 06:59:40,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 06:59:40,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:59:40,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 06:59:40,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 06:59:40,531 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 06:59:40,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 06:59:40,546 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 06:59:40,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589636639] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 06:59:40,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 06:59:40,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 06:59:40,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777473157] [2023-09-01 06:59:40,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 06:59:40,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 06:59:40,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:59:40,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 06:59:40,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 06:59:40,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 737 [2023-09-01 06:59:40,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 77 transitions, 185 flow. Second operand has 7 states, 7 states have (on average 326.85714285714283) internal successors, (2288), 7 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:59:40,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:59:40,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 737 [2023-09-01 06:59:40,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 06:59:49,562 INFO L130 PetriNetUnfolder]: 112970/158317 cut-off events. [2023-09-01 06:59:49,562 INFO L131 PetriNetUnfolder]: For 2497/2497 co-relation queries the response was YES. [2023-09-01 06:59:49,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 309517 conditions, 158317 events. 112970/158317 cut-off events. For 2497/2497 co-relation queries the response was YES. Maximal size of possible extension queue 5825. Compared 1226214 event pairs, 108187 based on Foata normal form. 0/104674 useless extension candidates. Maximal degree in co-relation 309503. Up to 149347 conditions per place. [2023-09-01 06:59:50,265 INFO L137 encePairwiseOnDemand]: 734/737 looper letters, 63 selfloop transitions, 5 changer transitions 0/80 dead transitions. [2023-09-01 06:59:50,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 80 transitions, 333 flow [2023-09-01 06:59:50,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 06:59:50,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 06:59:50,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2021 transitions. [2023-09-01 06:59:50,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45703301673450925 [2023-09-01 06:59:50,271 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2021 transitions. [2023-09-01 06:59:50,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2021 transitions. [2023-09-01 06:59:50,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 06:59:50,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2021 transitions. [2023-09-01 06:59:50,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 336.8333333333333) internal successors, (2021), 6 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:59:50,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 737.0) internal successors, (5159), 7 states have internal predecessors, (5159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:59:50,282 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 737.0) internal successors, (5159), 7 states have internal predecessors, (5159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:59:50,283 INFO L175 Difference]: Start difference. First operand has 107 places, 77 transitions, 185 flow. Second operand 6 states and 2021 transitions. [2023-09-01 06:59:50,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 80 transitions, 333 flow [2023-09-01 06:59:50,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 80 transitions, 323 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 06:59:50,286 INFO L231 Difference]: Finished difference. Result has 89 places, 80 transitions, 211 flow [2023-09-01 06:59:50,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=737, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=211, PETRI_PLACES=89, PETRI_TRANSITIONS=80} [2023-09-01 06:59:50,287 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -21 predicate places. [2023-09-01 06:59:50,287 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 80 transitions, 211 flow [2023-09-01 06:59:50,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 326.85714285714283) internal successors, (2288), 7 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:59:50,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:59:50,288 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 06:59:50,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 06:59:50,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-09-01 06:59:50,494 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:59:50,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:59:50,495 INFO L85 PathProgramCache]: Analyzing trace with hash 18280931, now seen corresponding path program 2 times [2023-09-01 06:59:50,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:59:50,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768904274] [2023-09-01 06:59:50,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:59:50,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:59:50,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 06:59:50,580 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 06:59:50,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 06:59:50,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768904274] [2023-09-01 06:59:50,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768904274] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 06:59:50,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638600136] [2023-09-01 06:59:50,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 06:59:50,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 06:59:50,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:59:50,583 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 06:59:50,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 06:59:50,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 06:59:50,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 06:59:50,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 06:59:50,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 06:59:50,708 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 06:59:50,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 06:59:50,763 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 06:59:50,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638600136] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 06:59:50,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 06:59:50,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 06:59:50,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228053974] [2023-09-01 06:59:50,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 06:59:50,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 06:59:50,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 06:59:50,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 06:59:50,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 06:59:50,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 737 [2023-09-01 06:59:50,802 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 80 transitions, 211 flow. Second operand has 13 states, 13 states have (on average 326.46153846153845) internal successors, (4244), 13 states have internal predecessors, (4244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 06:59:50,803 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 06:59:50,803 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 737 [2023-09-01 06:59:50,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:00:00,728 INFO L130 PetriNetUnfolder]: 112970/158323 cut-off events. [2023-09-01 07:00:00,728 INFO L131 PetriNetUnfolder]: For 1089/1089 co-relation queries the response was YES. [2023-09-01 07:00:01,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308940 conditions, 158323 events. 112970/158323 cut-off events. For 1089/1089 co-relation queries the response was YES. Maximal size of possible extension queue 5825. Compared 1226483 event pairs, 108187 based on Foata normal form. 6/104687 useless extension candidates. Maximal degree in co-relation 308880. Up to 149347 conditions per place. [2023-09-01 07:00:01,809 INFO L137 encePairwiseOnDemand]: 734/737 looper letters, 63 selfloop transitions, 11 changer transitions 0/86 dead transitions. [2023-09-01 07:00:01,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 86 transitions, 395 flow [2023-09-01 07:00:01,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 07:00:01,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 07:00:01,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3980 transitions. [2023-09-01 07:00:01,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4500226142017187 [2023-09-01 07:00:01,820 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3980 transitions. [2023-09-01 07:00:01,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3980 transitions. [2023-09-01 07:00:01,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:00:01,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3980 transitions. [2023-09-01 07:00:01,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 331.6666666666667) internal successors, (3980), 12 states have internal predecessors, (3980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:00:01,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 737.0) internal successors, (9581), 13 states have internal predecessors, (9581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:00:01,845 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 737.0) internal successors, (9581), 13 states have internal predecessors, (9581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:00:01,845 INFO L175 Difference]: Start difference. First operand has 89 places, 80 transitions, 211 flow. Second operand 12 states and 3980 transitions. [2023-09-01 07:00:01,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 86 transitions, 395 flow [2023-09-01 07:00:01,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 86 transitions, 381 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 07:00:01,848 INFO L231 Difference]: Finished difference. Result has 105 places, 86 transitions, 281 flow [2023-09-01 07:00:01,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=737, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=281, PETRI_PLACES=105, PETRI_TRANSITIONS=86} [2023-09-01 07:00:01,850 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -5 predicate places. [2023-09-01 07:00:01,850 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 86 transitions, 281 flow [2023-09-01 07:00:01,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 326.46153846153845) internal successors, (4244), 13 states have internal predecessors, (4244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:00:01,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:00:01,851 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 07:00:01,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 07:00:02,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:00:02,059 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:00:02,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:00:02,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1327720061, now seen corresponding path program 3 times [2023-09-01 07:00:02,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:00:02,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255082228] [2023-09-01 07:00:02,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:00:02,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:00:02,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 07:00:02,092 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 07:00:02,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 07:00:02,140 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 07:00:02,141 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 07:00:02,141 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 07:00:02,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 07:00:02,141 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 07:00:02,143 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 07:00:02,144 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 07:00:02,144 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-09-01 07:00:02,193 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 07:00:02,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 411 places, 475 transitions, 994 flow [2023-09-01 07:00:02,380 INFO L130 PetriNetUnfolder]: 157/1049 cut-off events. [2023-09-01 07:00:02,380 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-09-01 07:00:02,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1104 conditions, 1049 events. 157/1049 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 5192 event pairs, 6 based on Foata normal form. 0/808 useless extension candidates. Maximal degree in co-relation 753. Up to 32 conditions per place. [2023-09-01 07:00:02,412 INFO L82 GeneralOperation]: Start removeDead. Operand has 411 places, 475 transitions, 994 flow [2023-09-01 07:00:02,422 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 409 places, 473 transitions, 990 flow [2023-09-01 07:00:02,422 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 07:00:02,422 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 409 places, 473 transitions, 990 flow [2023-09-01 07:00:02,422 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 409 places, 473 transitions, 990 flow [2023-09-01 07:00:02,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 409 places, 473 transitions, 990 flow [2023-09-01 07:00:02,565 INFO L130 PetriNetUnfolder]: 157/1047 cut-off events. [2023-09-01 07:00:02,565 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-09-01 07:00:02,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1102 conditions, 1047 events. 157/1047 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 5195 event pairs, 6 based on Foata normal form. 0/808 useless extension candidates. Maximal degree in co-relation 751. Up to 32 conditions per place. [2023-09-01 07:00:02,661 INFO L119 LiptonReduction]: Number of co-enabled transitions 145960 [2023-09-01 07:00:08,575 INFO L134 LiptonReduction]: Checked pairs total: 266543 [2023-09-01 07:00:08,575 INFO L136 LiptonReduction]: Total number of compositions: 428 [2023-09-01 07:00:08,577 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 07:00:08,577 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;@30096601, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 07:00:08,577 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 07:00:08,599 INFO L130 PetriNetUnfolder]: 80/284 cut-off events. [2023-09-01 07:00:08,599 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-09-01 07:00:08,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:00:08,599 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:00:08,600 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:00:08,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:00:08,600 INFO L85 PathProgramCache]: Analyzing trace with hash -870879168, now seen corresponding path program 1 times [2023-09-01 07:00:08,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:00:08,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322577982] [2023-09-01 07:00:08,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:00:08,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:00:08,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:00:08,628 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-09-01 07:00:08,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:00:08,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322577982] [2023-09-01 07:00:08,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322577982] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 07:00:08,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 07:00:08,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 07:00:08,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007736838] [2023-09-01 07:00:08,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 07:00:08,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 07:00:08,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:00:08,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 07:00:08,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 07:00:08,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 395 out of 903 [2023-09-01 07:00:08,640 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 186 transitions, 416 flow. Second operand has 3 states, 3 states have (on average 397.6666666666667) internal successors, (1193), 3 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:00:08,641 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:00:08,641 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 395 of 903 [2023-09-01 07:00:08,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand