./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3c0354ee6107efc04d15102ecf9eef73430e38e14b70f16419cd07cd733fd0df --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 11:09:55,186 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 11:09:55,187 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 11:09:55,222 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 11:09:55,224 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 11:09:55,226 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 11:09:55,227 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 11:09:55,229 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 11:09:55,231 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 11:09:55,234 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 11:09:55,235 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 11:09:55,236 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 11:09:55,237 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 11:09:55,238 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 11:09:55,239 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 11:09:55,242 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 11:09:55,243 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 11:09:55,244 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 11:09:55,245 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 11:09:55,247 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 11:09:55,248 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 11:09:55,249 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 11:09:55,250 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 11:09:55,250 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 11:09:55,256 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 11:09:55,256 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 11:09:55,256 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 11:09:55,257 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 11:09:55,258 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 11:09:55,258 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 11:09:55,258 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 11:09:55,262 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 11:09:55,263 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 11:09:55,264 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 11:09:55,265 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 11:09:55,265 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 11:09:55,265 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 11:09:55,266 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 11:09:55,266 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 11:09:55,266 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 11:09:55,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 11:09:55,267 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 11:09:55,287 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 11:09:55,287 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 11:09:55,288 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 11:09:55,288 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 11:09:55,288 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 11:09:55,289 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 11:09:55,289 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 11:09:55,289 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 11:09:55,289 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 11:09:55,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 11:09:55,290 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 11:09:55,290 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 11:09:55,290 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 11:09:55,290 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 11:09:55,291 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 11:09:55,291 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 11:09:55,291 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 11:09:55,291 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 11:09:55,291 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 11:09:55,292 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 11:09:55,293 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 11:09:55,295 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 11:09:55,296 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 11:09:55,297 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 11:09:55,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 11:09:55,297 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 11:09:55,297 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 11:09:55,297 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 11:09:55,297 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 11:09:55,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 11:09:55,298 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 11:09:55,298 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 11:09:55,298 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 11:09:55,298 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 11:09:55,298 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 11:09:55,298 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c0354ee6107efc04d15102ecf9eef73430e38e14b70f16419cd07cd733fd0df Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 11:09:55,522 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 11:09:55,537 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 11:09:55,539 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 11:09:55,539 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 11:09:55,540 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 11:09:55,541 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2023-09-01 11:09:56,439 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 11:09:56,662 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 11:09:56,667 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2023-09-01 11:09:56,681 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d752f5fe9/89ac3cf19ffe434d9e8ca4df773a9654/FLAGd020b77f0 [2023-09-01 11:09:56,698 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d752f5fe9/89ac3cf19ffe434d9e8ca4df773a9654 [2023-09-01 11:09:56,700 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 11:09:56,700 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 11:09:56,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 11:09:56,702 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 11:09:56,704 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 11:09:56,704 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 11:09:56" (1/1) ... [2023-09-01 11:09:56,705 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22caa29e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:56, skipping insertion in model container [2023-09-01 11:09:56,707 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 11:09:56" (1/1) ... [2023-09-01 11:09:56,711 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 11:09:56,754 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 11:09:57,086 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_75-tricky_address2_racefree.i[41323,41336] [2023-09-01 11:09:57,112 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 11:09:57,130 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 11:09:57,178 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_75-tricky_address2_racefree.i[41323,41336] [2023-09-01 11:09:57,198 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 11:09:57,266 INFO L208 MainTranslator]: Completed translation [2023-09-01 11:09:57,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:57 WrapperNode [2023-09-01 11:09:57,266 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 11:09:57,267 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 11:09:57,267 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 11:09:57,267 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 11:09:57,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:57" (1/1) ... [2023-09-01 11:09:57,294 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:57" (1/1) ... [2023-09-01 11:09:57,310 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 190 [2023-09-01 11:09:57,313 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 11:09:57,313 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 11:09:57,314 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 11:09:57,314 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 11:09:57,320 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:57" (1/1) ... [2023-09-01 11:09:57,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:57" (1/1) ... [2023-09-01 11:09:57,330 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:57" (1/1) ... [2023-09-01 11:09:57,332 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:57" (1/1) ... [2023-09-01 11:09:57,339 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:57" (1/1) ... [2023-09-01 11:09:57,350 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:57" (1/1) ... [2023-09-01 11:09:57,352 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:57" (1/1) ... [2023-09-01 11:09:57,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:57" (1/1) ... [2023-09-01 11:09:57,357 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 11:09:57,361 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 11:09:57,361 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 11:09:57,361 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 11:09:57,362 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:57" (1/1) ... [2023-09-01 11:09:57,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 11:09:57,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:09:57,383 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 11:09:57,404 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 11:09:57,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 11:09:57,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 11:09:57,410 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 11:09:57,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 11:09:57,410 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 11:09:57,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 11:09:57,410 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-09-01 11:09:57,410 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-09-01 11:09:57,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 11:09:57,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 11:09:57,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 11:09:57,412 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 11:09:57,554 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 11:09:57,555 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 11:09:57,731 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 11:09:57,754 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 11:09:57,754 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-09-01 11:09:57,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 11:09:57 BoogieIcfgContainer [2023-09-01 11:09:57,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 11:09:57,757 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 11:09:57,758 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 11:09:57,760 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 11:09:57,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 11:09:56" (1/3) ... [2023-09-01 11:09:57,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fb52edc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 11:09:57, skipping insertion in model container [2023-09-01 11:09:57,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:57" (2/3) ... [2023-09-01 11:09:57,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fb52edc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 11:09:57, skipping insertion in model container [2023-09-01 11:09:57,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 11:09:57" (3/3) ... [2023-09-01 11:09:57,762 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_75-tricky_address2_racefree.i [2023-09-01 11:09:57,767 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 11:09:57,773 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 11:09:57,782 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-09-01 11:09:57,782 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 11:09:57,854 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-09-01 11:09:57,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 190 transitions, 388 flow [2023-09-01 11:09:57,941 INFO L130 PetriNetUnfolder]: 45/260 cut-off events. [2023-09-01 11:09:57,941 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2023-09-01 11:09:57,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 260 events. 45/260 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 817 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 143. Up to 8 conditions per place. [2023-09-01 11:09:57,948 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 190 transitions, 388 flow [2023-09-01 11:09:57,951 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 158 places, 185 transitions, 375 flow [2023-09-01 11:09:57,953 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:09:57,961 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 158 places, 185 transitions, 375 flow [2023-09-01 11:09:57,962 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 158 places, 185 transitions, 375 flow [2023-09-01 11:09:57,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 185 transitions, 375 flow [2023-09-01 11:09:57,998 INFO L130 PetriNetUnfolder]: 44/255 cut-off events. [2023-09-01 11:09:57,998 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 11:09:57,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 255 events. 44/255 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 776 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 143. Up to 8 conditions per place. [2023-09-01 11:09:58,002 INFO L119 LiptonReduction]: Number of co-enabled transitions 10336 [2023-09-01 11:10:00,048 INFO L134 LiptonReduction]: Checked pairs total: 15158 [2023-09-01 11:10:00,048 INFO L136 LiptonReduction]: Total number of compositions: 151 [2023-09-01 11:10:00,061 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 11:10:00,065 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;@32a1c1f9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:10:00,065 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 11:10:00,069 INFO L130 PetriNetUnfolder]: 7/31 cut-off events. [2023-09-01 11:10:00,069 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 11:10:00,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:10:00,070 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-09-01 11:10:00,070 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:10:00,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:10:00,073 INFO L85 PathProgramCache]: Analyzing trace with hash -164803575, now seen corresponding path program 1 times [2023-09-01 11:10:00,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:10:00,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483891679] [2023-09-01 11:10:00,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:10:00,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:10:00,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:10:00,241 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 11:10:00,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:10:00,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483891679] [2023-09-01 11:10:00,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483891679] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:10:00,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:10:00,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 11:10:00,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185564146] [2023-09-01 11:10:00,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:10:00,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 11:10:00,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:10:00,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 11:10:00,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 11:10:00,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 341 [2023-09-01 11:10:00,293 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 65 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 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 11:10:00,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:10:00,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 341 [2023-09-01 11:10:00,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:10:00,421 INFO L130 PetriNetUnfolder]: 301/651 cut-off events. [2023-09-01 11:10:00,422 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 11:10:00,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1245 conditions, 651 events. 301/651 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3189 event pairs, 266 based on Foata normal form. 107/643 useless extension candidates. Maximal degree in co-relation 1189. Up to 588 conditions per place. [2023-09-01 11:10:00,424 INFO L137 encePairwiseOnDemand]: 318/341 looper letters, 20 selfloop transitions, 2 changer transitions 19/46 dead transitions. [2023-09-01 11:10:00,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 46 transitions, 173 flow [2023-09-01 11:10:00,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 11:10:00,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 11:10:00,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 524 transitions. [2023-09-01 11:10:00,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.512218963831867 [2023-09-01 11:10:00,452 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 524 transitions. [2023-09-01 11:10:00,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 524 transitions. [2023-09-01 11:10:00,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:10:00,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 524 transitions. [2023-09-01 11:10:00,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 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 11:10:00,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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 11:10:00,465 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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 11:10:00,466 INFO L175 Difference]: Start difference. First operand has 45 places, 65 transitions, 135 flow. Second operand 3 states and 524 transitions. [2023-09-01 11:10:00,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 46 transitions, 173 flow [2023-09-01 11:10:00,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 46 transitions, 173 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 11:10:00,469 INFO L231 Difference]: Finished difference. Result has 48 places, 27 transitions, 69 flow [2023-09-01 11:10:00,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=48, PETRI_TRANSITIONS=27} [2023-09-01 11:10:00,473 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2023-09-01 11:10:00,473 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 27 transitions, 69 flow [2023-09-01 11:10:00,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 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 11:10:00,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:10:00,474 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-09-01 11:10:00,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 11:10:00,474 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:10:00,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:10:00,476 INFO L85 PathProgramCache]: Analyzing trace with hash 716448256, now seen corresponding path program 1 times [2023-09-01 11:10:00,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:10:00,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10576023] [2023-09-01 11:10:00,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:10:00,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:10:00,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:10:00,564 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 11:10:00,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:10:00,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10576023] [2023-09-01 11:10:00,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10576023] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:10:00,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987110092] [2023-09-01 11:10:00,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:10:00,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:10:00,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:10:00,568 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 11:10:00,592 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 11:10:00,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:10:00,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 11:10:00,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:10:00,699 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 11:10:00,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:10:00,711 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 11:10:00,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987110092] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:10:00,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:10:00,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 11:10:00,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835910852] [2023-09-01 11:10:00,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:10:00,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 11:10:00,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:10:00,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 11:10:00,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 11:10:00,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 341 [2023-09-01 11:10:00,730 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 27 transitions, 69 flow. Second operand has 7 states, 7 states have (on average 155.57142857142858) internal successors, (1089), 7 states have internal predecessors, (1089), 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 11:10:00,730 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:10:00,731 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 341 [2023-09-01 11:10:00,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:10:00,775 INFO L130 PetriNetUnfolder]: 47/128 cut-off events. [2023-09-01 11:10:00,775 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 11:10:00,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 128 events. 47/128 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 359 event pairs, 42 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 243. Up to 108 conditions per place. [2023-09-01 11:10:00,777 INFO L137 encePairwiseOnDemand]: 338/341 looper letters, 20 selfloop transitions, 5 changer transitions 0/30 dead transitions. [2023-09-01 11:10:00,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 30 transitions, 131 flow [2023-09-01 11:10:00,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 11:10:00,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 11:10:00,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 952 transitions. [2023-09-01 11:10:00,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46529814271749753 [2023-09-01 11:10:00,780 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 952 transitions. [2023-09-01 11:10:00,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 952 transitions. [2023-09-01 11:10:00,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:10:00,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 952 transitions. [2023-09-01 11:10:00,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 158.66666666666666) internal successors, (952), 6 states have internal predecessors, (952), 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 11:10:00,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 341.0) internal successors, (2387), 7 states have internal predecessors, (2387), 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 11:10:00,818 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 341.0) internal successors, (2387), 7 states have internal predecessors, (2387), 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 11:10:00,818 INFO L175 Difference]: Start difference. First operand has 48 places, 27 transitions, 69 flow. Second operand 6 states and 952 transitions. [2023-09-01 11:10:00,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 30 transitions, 131 flow [2023-09-01 11:10:00,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 30 transitions, 127 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 11:10:00,820 INFO L231 Difference]: Finished difference. Result has 37 places, 30 transitions, 101 flow [2023-09-01 11:10:00,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=101, PETRI_PLACES=37, PETRI_TRANSITIONS=30} [2023-09-01 11:10:00,823 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -8 predicate places. [2023-09-01 11:10:00,823 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 30 transitions, 101 flow [2023-09-01 11:10:00,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 155.57142857142858) internal successors, (1089), 7 states have internal predecessors, (1089), 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 11:10:00,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:10:00,824 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-09-01 11:10:00,831 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 11:10:01,024 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 11:10:01,025 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:10:01,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:10:01,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1278120393, now seen corresponding path program 2 times [2023-09-01 11:10:01,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:10:01,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488301989] [2023-09-01 11:10:01,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:10:01,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:10:01,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:10:01,141 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 11:10:01,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:10:01,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488301989] [2023-09-01 11:10:01,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488301989] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:10:01,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767867670] [2023-09-01 11:10:01,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:10:01,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:10:01,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:10:01,146 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 11:10:01,172 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 11:10:01,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:10:01,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:10:01,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 11:10:01,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:10:01,262 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 11:10:01,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:10:01,325 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 11:10:01,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767867670] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:10:01,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:10:01,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 11:10:01,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98608456] [2023-09-01 11:10:01,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:10:01,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:10:01,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:10:01,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:10:01,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 11:10:01,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 341 [2023-09-01 11:10:01,386 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 101 flow. Second operand has 13 states, 13 states have (on average 155.30769230769232) internal successors, (2019), 13 states have internal predecessors, (2019), 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 11:10:01,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:10:01,386 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 341 [2023-09-01 11:10:01,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:10:01,460 INFO L130 PetriNetUnfolder]: 47/134 cut-off events. [2023-09-01 11:10:01,460 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-09-01 11:10:01,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 134 events. 47/134 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 359 event pairs, 42 based on Foata normal form. 6/116 useless extension candidates. Maximal degree in co-relation 234. Up to 108 conditions per place. [2023-09-01 11:10:01,461 INFO L137 encePairwiseOnDemand]: 338/341 looper letters, 20 selfloop transitions, 11 changer transitions 0/36 dead transitions. [2023-09-01 11:10:01,461 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 36 transitions, 199 flow [2023-09-01 11:10:01,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:10:01,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:10:01,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1885 transitions. [2023-09-01 11:10:01,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46065493646138805 [2023-09-01 11:10:01,466 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1885 transitions. [2023-09-01 11:10:01,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1885 transitions. [2023-09-01 11:10:01,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:10:01,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1885 transitions. [2023-09-01 11:10:01,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 157.08333333333334) internal successors, (1885), 12 states have internal predecessors, (1885), 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 11:10:01,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 341.0) internal successors, (4433), 13 states have internal predecessors, (4433), 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 11:10:01,491 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 341.0) internal successors, (4433), 13 states have internal predecessors, (4433), 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 11:10:01,491 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 101 flow. Second operand 12 states and 1885 transitions. [2023-09-01 11:10:01,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 36 transitions, 199 flow [2023-09-01 11:10:01,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 36 transitions, 185 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 11:10:01,493 INFO L231 Difference]: Finished difference. Result has 53 places, 36 transitions, 171 flow [2023-09-01 11:10:01,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=171, PETRI_PLACES=53, PETRI_TRANSITIONS=36} [2023-09-01 11:10:01,494 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 8 predicate places. [2023-09-01 11:10:01,494 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 36 transitions, 171 flow [2023-09-01 11:10:01,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 155.30769230769232) internal successors, (2019), 13 states have internal predecessors, (2019), 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 11:10:01,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:10:01,496 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-09-01 11:10:01,504 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 11:10:01,701 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 11:10:01,701 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:10:01,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:10:01,701 INFO L85 PathProgramCache]: Analyzing trace with hash 766826089, now seen corresponding path program 3 times [2023-09-01 11:10:01,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:10:01,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103630008] [2023-09-01 11:10:01,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:10:01,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:10:01,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:10:01,742 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 11:10:01,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:10:01,774 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 11:10:01,774 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 11:10:01,774 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 11:10:01,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 11:10:01,776 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 11:10:01,777 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 11:10:01,777 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 11:10:01,777 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 11:10:01,809 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 11:10:01,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 260 transitions, 538 flow [2023-09-01 11:10:01,854 INFO L130 PetriNetUnfolder]: 75/424 cut-off events. [2023-09-01 11:10:01,854 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-09-01 11:10:01,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 424 events. 75/424 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1687 event pairs, 0 based on Foata normal form. 0/340 useless extension candidates. Maximal degree in co-relation 262. Up to 12 conditions per place. [2023-09-01 11:10:01,856 INFO L82 GeneralOperation]: Start removeDead. Operand has 220 places, 260 transitions, 538 flow [2023-09-01 11:10:01,859 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 220 places, 260 transitions, 538 flow [2023-09-01 11:10:01,859 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:10:01,859 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 220 places, 260 transitions, 538 flow [2023-09-01 11:10:01,860 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 220 places, 260 transitions, 538 flow [2023-09-01 11:10:01,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 260 transitions, 538 flow [2023-09-01 11:10:01,897 INFO L130 PetriNetUnfolder]: 75/424 cut-off events. [2023-09-01 11:10:01,898 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-09-01 11:10:01,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 424 events. 75/424 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1687 event pairs, 0 based on Foata normal form. 0/340 useless extension candidates. Maximal degree in co-relation 262. Up to 12 conditions per place. [2023-09-01 11:10:01,911 INFO L119 LiptonReduction]: Number of co-enabled transitions 31416 [2023-09-01 11:10:04,254 INFO L134 LiptonReduction]: Checked pairs total: 55124 [2023-09-01 11:10:04,254 INFO L136 LiptonReduction]: Total number of compositions: 218 [2023-09-01 11:10:04,255 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 11:10:04,256 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;@32a1c1f9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:10:04,256 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 11:10:04,262 INFO L130 PetriNetUnfolder]: 38/115 cut-off events. [2023-09-01 11:10:04,263 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 11:10:04,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:10:04,263 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 11:10:04,263 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:10:04,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:10:04,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1123911026, now seen corresponding path program 1 times [2023-09-01 11:10:04,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:10:04,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998213224] [2023-09-01 11:10:04,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:10:04,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:10:04,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:10:04,301 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 11:10:04,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:10:04,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998213224] [2023-09-01 11:10:04,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998213224] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:10:04,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:10:04,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 11:10:04,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848953311] [2023-09-01 11:10:04,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:10:04,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 11:10:04,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:10:04,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 11:10:04,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 11:10:04,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 478 [2023-09-01 11:10:04,310 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 100 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 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 11:10:04,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:10:04,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 478 [2023-09-01 11:10:04,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:10:05,198 INFO L130 PetriNetUnfolder]: 9872/15757 cut-off events. [2023-09-01 11:10:05,199 INFO L131 PetriNetUnfolder]: For 109/109 co-relation queries the response was YES. [2023-09-01 11:10:05,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30205 conditions, 15757 events. 9872/15757 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 104377 event pairs, 9112 based on Foata normal form. 2730/16056 useless extension candidates. Maximal degree in co-relation 12164. Up to 14349 conditions per place. [2023-09-01 11:10:05,227 INFO L137 encePairwiseOnDemand]: 444/478 looper letters, 36 selfloop transitions, 2 changer transitions 23/70 dead transitions. [2023-09-01 11:10:05,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 272 flow [2023-09-01 11:10:05,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 11:10:05,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 11:10:05,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 719 transitions. [2023-09-01 11:10:05,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50139470013947 [2023-09-01 11:10:05,230 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 719 transitions. [2023-09-01 11:10:05,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 719 transitions. [2023-09-01 11:10:05,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:10:05,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 719 transitions. [2023-09-01 11:10:05,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 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 11:10:05,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 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 11:10:05,234 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 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 11:10:05,234 INFO L175 Difference]: Start difference. First operand has 68 places, 100 transitions, 218 flow. Second operand 3 states and 719 transitions. [2023-09-01 11:10:05,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 272 flow [2023-09-01 11:10:05,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 272 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 11:10:05,238 INFO L231 Difference]: Finished difference. Result has 71 places, 47 transitions, 116 flow [2023-09-01 11:10:05,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=71, PETRI_TRANSITIONS=47} [2023-09-01 11:10:05,239 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-09-01 11:10:05,239 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 47 transitions, 116 flow [2023-09-01 11:10:05,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 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 11:10:05,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:10:05,240 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-09-01 11:10:05,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 11:10:05,240 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:10:05,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:10:05,240 INFO L85 PathProgramCache]: Analyzing trace with hash -207077384, now seen corresponding path program 1 times [2023-09-01 11:10:05,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:10:05,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132909097] [2023-09-01 11:10:05,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:10:05,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:10:05,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:10:05,279 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 11:10:05,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:10:05,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132909097] [2023-09-01 11:10:05,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132909097] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:10:05,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752922347] [2023-09-01 11:10:05,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:10:05,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:10:05,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:10:05,283 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 11:10:05,285 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 11:10:05,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:10:05,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 11:10:05,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:10:05,356 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 11:10:05,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:10:05,370 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 11:10:05,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752922347] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:10:05,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:10:05,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 11:10:05,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144703220] [2023-09-01 11:10:05,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:10:05,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 11:10:05,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:10:05,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 11:10:05,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 11:10:05,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 478 [2023-09-01 11:10:05,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 47 transitions, 116 flow. Second operand has 7 states, 7 states have (on average 210.71428571428572) internal successors, (1475), 7 states have internal predecessors, (1475), 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 11:10:05,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:10:05,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 478 [2023-09-01 11:10:05,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:10:05,610 INFO L130 PetriNetUnfolder]: 1738/2923 cut-off events. [2023-09-01 11:10:05,610 INFO L131 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2023-09-01 11:10:05,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5649 conditions, 2923 events. 1738/2923 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16152 event pairs, 1617 based on Foata normal form. 0/2391 useless extension candidates. Maximal degree in co-relation 5636. Up to 2647 conditions per place. [2023-09-01 11:10:05,618 INFO L137 encePairwiseOnDemand]: 475/478 looper letters, 36 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2023-09-01 11:10:05,618 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 50 transitions, 210 flow [2023-09-01 11:10:05,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 11:10:05,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 11:10:05,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1298 transitions. [2023-09-01 11:10:05,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4525801952580195 [2023-09-01 11:10:05,624 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1298 transitions. [2023-09-01 11:10:05,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1298 transitions. [2023-09-01 11:10:05,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:10:05,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1298 transitions. [2023-09-01 11:10:05,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 216.33333333333334) internal successors, (1298), 6 states have internal predecessors, (1298), 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 11:10:05,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 478.0) internal successors, (3346), 7 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 11:10:05,631 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 478.0) internal successors, (3346), 7 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 11:10:05,631 INFO L175 Difference]: Start difference. First operand has 71 places, 47 transitions, 116 flow. Second operand 6 states and 1298 transitions. [2023-09-01 11:10:05,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 50 transitions, 210 flow [2023-09-01 11:10:05,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 50 transitions, 204 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 11:10:05,633 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 146 flow [2023-09-01 11:10:05,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=146, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2023-09-01 11:10:05,636 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -10 predicate places. [2023-09-01 11:10:05,636 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 146 flow [2023-09-01 11:10:05,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 210.71428571428572) internal successors, (1475), 7 states have internal predecessors, (1475), 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 11:10:05,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:10:05,637 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 11:10:05,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-09-01 11:10:05,841 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 11:10:05,841 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:10:05,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:10:05,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1964701426, now seen corresponding path program 2 times [2023-09-01 11:10:05,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:10:05,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921552369] [2023-09-01 11:10:05,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:10:05,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:10:05,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:10:05,919 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 11:10:05,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:10:05,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921552369] [2023-09-01 11:10:05,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921552369] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:10:05,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762924040] [2023-09-01 11:10:05,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:10:05,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:10:05,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:10:05,926 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 11:10:05,928 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 11:10:05,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:10:05,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:10:05,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 11:10:05,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:10:06,012 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 11:10:06,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:10:06,049 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 11:10:06,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762924040] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:10:06,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:10:06,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 11:10:06,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738793041] [2023-09-01 11:10:06,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:10:06,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:10:06,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:10:06,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:10:06,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 11:10:06,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 478 [2023-09-01 11:10:06,077 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 146 flow. Second operand has 13 states, 13 states have (on average 210.3846153846154) internal successors, (2735), 13 states have internal predecessors, (2735), 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 11:10:06,077 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:10:06,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 478 [2023-09-01 11:10:06,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:10:06,313 INFO L130 PetriNetUnfolder]: 1738/2929 cut-off events. [2023-09-01 11:10:06,313 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2023-09-01 11:10:06,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5680 conditions, 2929 events. 1738/2929 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16191 event pairs, 1617 based on Foata normal form. 6/2404 useless extension candidates. Maximal degree in co-relation 5621. Up to 2647 conditions per place. [2023-09-01 11:10:06,324 INFO L137 encePairwiseOnDemand]: 475/478 looper letters, 36 selfloop transitions, 11 changer transitions 0/56 dead transitions. [2023-09-01 11:10:06,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 56 transitions, 276 flow [2023-09-01 11:10:06,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:10:06,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:10:06,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2561 transitions. [2023-09-01 11:10:06,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4464783821478382 [2023-09-01 11:10:06,329 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2561 transitions. [2023-09-01 11:10:06,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2561 transitions. [2023-09-01 11:10:06,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:10:06,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2561 transitions. [2023-09-01 11:10:06,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 213.41666666666666) internal successors, (2561), 12 states have internal predecessors, (2561), 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 11:10:06,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 478.0) internal successors, (6214), 13 states have internal predecessors, (6214), 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 11:10:06,340 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 478.0) internal successors, (6214), 13 states have internal predecessors, (6214), 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 11:10:06,340 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 146 flow. Second operand 12 states and 2561 transitions. [2023-09-01 11:10:06,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 56 transitions, 276 flow [2023-09-01 11:10:06,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 56 transitions, 262 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 11:10:06,342 INFO L231 Difference]: Finished difference. Result has 74 places, 56 transitions, 216 flow [2023-09-01 11:10:06,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=216, PETRI_PLACES=74, PETRI_TRANSITIONS=56} [2023-09-01 11:10:06,343 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 6 predicate places. [2023-09-01 11:10:06,343 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 56 transitions, 216 flow [2023-09-01 11:10:06,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 210.3846153846154) internal successors, (2735), 13 states have internal predecessors, (2735), 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 11:10:06,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:10:06,345 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 11:10:06,356 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 11:10:06,549 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 11:10:06,550 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:10:06,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:10:06,550 INFO L85 PathProgramCache]: Analyzing trace with hash -193054414, now seen corresponding path program 3 times [2023-09-01 11:10:06,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:10:06,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49877753] [2023-09-01 11:10:06,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:10:06,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:10:06,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:10:06,574 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 11:10:06,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:10:06,595 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 11:10:06,595 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 11:10:06,595 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 11:10:06,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 11:10:06,595 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 11:10:06,596 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 11:10:06,596 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 11:10:06,596 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-09-01 11:10:06,626 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 11:10:06,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 330 transitions, 690 flow [2023-09-01 11:10:06,674 INFO L130 PetriNetUnfolder]: 110/619 cut-off events. [2023-09-01 11:10:06,674 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-09-01 11:10:06,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 647 conditions, 619 events. 110/619 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2706 event pairs, 1 based on Foata normal form. 0/498 useless extension candidates. Maximal degree in co-relation 432. Up to 16 conditions per place. [2023-09-01 11:10:06,677 INFO L82 GeneralOperation]: Start removeDead. Operand has 278 places, 330 transitions, 690 flow [2023-09-01 11:10:06,682 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 278 places, 330 transitions, 690 flow [2023-09-01 11:10:06,682 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:10:06,682 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 278 places, 330 transitions, 690 flow [2023-09-01 11:10:06,682 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 278 places, 330 transitions, 690 flow [2023-09-01 11:10:06,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 330 transitions, 690 flow [2023-09-01 11:10:06,731 INFO L130 PetriNetUnfolder]: 110/619 cut-off events. [2023-09-01 11:10:06,731 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-09-01 11:10:06,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 647 conditions, 619 events. 110/619 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2706 event pairs, 1 based on Foata normal form. 0/498 useless extension candidates. Maximal degree in co-relation 432. Up to 16 conditions per place. [2023-09-01 11:10:06,749 INFO L119 LiptonReduction]: Number of co-enabled transitions 61608 [2023-09-01 11:10:09,532 INFO L134 LiptonReduction]: Checked pairs total: 109900 [2023-09-01 11:10:09,533 INFO L136 LiptonReduction]: Total number of compositions: 271 [2023-09-01 11:10:09,534 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 11:10:09,534 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=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;@32a1c1f9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:10:09,534 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 11:10:09,542 INFO L130 PetriNetUnfolder]: 65/186 cut-off events. [2023-09-01 11:10:09,542 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 11:10:09,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:10:09,542 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 11:10:09,542 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:10:09,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:10:09,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1033079782, now seen corresponding path program 1 times [2023-09-01 11:10:09,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:10:09,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437620119] [2023-09-01 11:10:09,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:10:09,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:10:09,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:10:09,566 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 11:10:09,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:10:09,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437620119] [2023-09-01 11:10:09,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437620119] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:10:09,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:10:09,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 11:10:09,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857764752] [2023-09-01 11:10:09,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:10:09,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 11:10:09,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:10:09,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 11:10:09,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 11:10:09,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 601 [2023-09-01 11:10:09,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 131 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 267.3333333333333) internal successors, (802), 3 states have internal predecessors, (802), 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 11:10:09,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:10:09,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 601 [2023-09-01 11:10:09,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:10:27,048 INFO L130 PetriNetUnfolder]: 252661/348965 cut-off events. [2023-09-01 11:10:27,048 INFO L131 PetriNetUnfolder]: For 3589/3589 co-relation queries the response was YES. [2023-09-01 11:10:27,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 681977 conditions, 348965 events. 252661/348965 cut-off events. For 3589/3589 co-relation queries the response was YES. Maximal size of possible extension queue 8440. Compared 2625001 event pairs, 240676 based on Foata normal form. 57687/354412 useless extension candidates. Maximal degree in co-relation 94389. Up to 330814 conditions per place. [2023-09-01 11:10:27,741 INFO L137 encePairwiseOnDemand]: 556/601 looper letters, 53 selfloop transitions, 2 changer transitions 24/90 dead transitions. [2023-09-01 11:10:27,741 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 90 transitions, 360 flow [2023-09-01 11:10:27,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 11:10:27,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 11:10:27,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 913 transitions. [2023-09-01 11:10:27,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5063782584581253 [2023-09-01 11:10:27,744 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 913 transitions. [2023-09-01 11:10:27,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 913 transitions. [2023-09-01 11:10:27,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:10:27,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 913 transitions. [2023-09-01 11:10:27,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 304.3333333333333) internal successors, (913), 3 states have internal predecessors, (913), 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 11:10:27,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 601.0) internal successors, (2404), 4 states have internal predecessors, (2404), 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 11:10:27,749 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 601.0) internal successors, (2404), 4 states have internal predecessors, (2404), 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 11:10:27,749 INFO L175 Difference]: Start difference. First operand has 88 places, 131 transitions, 292 flow. Second operand 3 states and 913 transitions. [2023-09-01 11:10:27,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 90 transitions, 360 flow [2023-09-01 11:10:27,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 90 transitions, 360 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 11:10:27,753 INFO L231 Difference]: Finished difference. Result has 91 places, 66 transitions, 163 flow [2023-09-01 11:10:27,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=91, PETRI_TRANSITIONS=66} [2023-09-01 11:10:27,754 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 3 predicate places. [2023-09-01 11:10:27,754 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 66 transitions, 163 flow [2023-09-01 11:10:27,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 267.3333333333333) internal successors, (802), 3 states have internal predecessors, (802), 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 11:10:27,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:10:27,754 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:10:27,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 11:10:27,756 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:10:27,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:10:27,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1353270178, now seen corresponding path program 1 times [2023-09-01 11:10:27,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:10:27,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258938945] [2023-09-01 11:10:27,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:10:27,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:10:27,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:10:27,784 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 11:10:27,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:10:27,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258938945] [2023-09-01 11:10:27,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258938945] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:10:27,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124318710] [2023-09-01 11:10:27,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:10:27,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:10:27,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:10:27,786 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 11:10:27,788 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 11:10:27,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:10:27,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 11:10:27,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:10:27,865 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 11:10:27,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:10:27,879 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 11:10:27,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124318710] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:10:27,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:10:27,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 11:10:27,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140569904] [2023-09-01 11:10:27,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:10:27,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 11:10:27,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:10:27,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 11:10:27,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 11:10:27,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 601 [2023-09-01 11:10:27,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 66 transitions, 163 flow. Second operand has 7 states, 7 states have (on average 265.85714285714283) internal successors, (1861), 7 states have internal predecessors, (1861), 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 11:10:27,893 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:10:27,893 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 601 [2023-09-01 11:10:27,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:10:31,280 INFO L130 PetriNetUnfolder]: 46210/64953 cut-off events. [2023-09-01 11:10:31,281 INFO L131 PetriNetUnfolder]: For 1816/1816 co-relation queries the response was YES. [2023-09-01 11:10:31,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127740 conditions, 64953 events. 46210/64953 cut-off events. For 1816/1816 co-relation queries the response was YES. Maximal size of possible extension queue 1958. Compared 431889 event pairs, 43965 based on Foata normal form. 0/53862 useless extension candidates. Maximal degree in co-relation 127726. Up to 61443 conditions per place. [2023-09-01 11:10:31,464 INFO L137 encePairwiseOnDemand]: 598/601 looper letters, 53 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2023-09-01 11:10:31,464 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 69 transitions, 291 flow [2023-09-01 11:10:31,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 11:10:31,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 11:10:31,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1645 transitions. [2023-09-01 11:10:31,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4561841375485302 [2023-09-01 11:10:31,468 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1645 transitions. [2023-09-01 11:10:31,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1645 transitions. [2023-09-01 11:10:31,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:10:31,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1645 transitions. [2023-09-01 11:10:31,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 274.1666666666667) internal successors, (1645), 6 states have internal predecessors, (1645), 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 11:10:31,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 601.0) internal successors, (4207), 7 states have internal predecessors, (4207), 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 11:10:31,474 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 601.0) internal successors, (4207), 7 states have internal predecessors, (4207), 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 11:10:31,475 INFO L175 Difference]: Start difference. First operand has 91 places, 66 transitions, 163 flow. Second operand 6 states and 1645 transitions. [2023-09-01 11:10:31,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 69 transitions, 291 flow [2023-09-01 11:10:31,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 69 transitions, 281 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 11:10:31,477 INFO L231 Difference]: Finished difference. Result has 78 places, 69 transitions, 189 flow [2023-09-01 11:10:31,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=189, PETRI_PLACES=78, PETRI_TRANSITIONS=69} [2023-09-01 11:10:31,478 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -10 predicate places. [2023-09-01 11:10:31,479 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 69 transitions, 189 flow [2023-09-01 11:10:31,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 265.85714285714283) internal successors, (1861), 7 states have internal predecessors, (1861), 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 11:10:31,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:10:31,488 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 11:10:31,495 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 11:10:31,692 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 11:10:31,692 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:10:31,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:10:31,692 INFO L85 PathProgramCache]: Analyzing trace with hash 756541926, now seen corresponding path program 2 times [2023-09-01 11:10:31,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:10:31,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765074376] [2023-09-01 11:10:31,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:10:31,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:10:31,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:10:31,746 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 11:10:31,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:10:31,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765074376] [2023-09-01 11:10:31,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765074376] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:10:31,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394696424] [2023-09-01 11:10:31,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:10:31,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:10:31,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:10:31,748 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 11:10:31,750 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 11:10:31,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:10:31,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:10:31,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 11:10:31,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:10:31,841 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 11:10:31,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:10:31,877 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 11:10:31,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394696424] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:10:31,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:10:31,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 11:10:31,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365546553] [2023-09-01 11:10:31,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:10:31,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:10:31,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:10:31,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:10:31,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 11:10:31,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 601 [2023-09-01 11:10:31,912 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 69 transitions, 189 flow. Second operand has 13 states, 13 states have (on average 265.46153846153845) internal successors, (3451), 13 states have internal predecessors, (3451), 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 11:10:31,912 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:10:31,912 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 601 [2023-09-01 11:10:31,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:10:35,423 INFO L130 PetriNetUnfolder]: 46210/64959 cut-off events. [2023-09-01 11:10:35,424 INFO L131 PetriNetUnfolder]: For 822/822 co-relation queries the response was YES. [2023-09-01 11:10:35,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127353 conditions, 64959 events. 46210/64959 cut-off events. For 822/822 co-relation queries the response was YES. Maximal size of possible extension queue 1958. Compared 431856 event pairs, 43965 based on Foata normal form. 6/53875 useless extension candidates. Maximal degree in co-relation 127293. Up to 61443 conditions per place. [2023-09-01 11:10:35,645 INFO L137 encePairwiseOnDemand]: 598/601 looper letters, 53 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2023-09-01 11:10:35,645 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 75 transitions, 353 flow [2023-09-01 11:10:35,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:10:35,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:10:35,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3238 transitions. [2023-09-01 11:10:35,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489739323349972 [2023-09-01 11:10:35,651 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3238 transitions. [2023-09-01 11:10:35,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3238 transitions. [2023-09-01 11:10:35,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:10:35,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3238 transitions. [2023-09-01 11:10:35,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 269.8333333333333) internal successors, (3238), 12 states have internal predecessors, (3238), 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 11:10:35,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 601.0) internal successors, (7813), 13 states have internal predecessors, (7813), 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 11:10:35,662 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 601.0) internal successors, (7813), 13 states have internal predecessors, (7813), 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 11:10:35,662 INFO L175 Difference]: Start difference. First operand has 78 places, 69 transitions, 189 flow. Second operand 12 states and 3238 transitions. [2023-09-01 11:10:35,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 75 transitions, 353 flow [2023-09-01 11:10:35,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 75 transitions, 339 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 11:10:35,664 INFO L231 Difference]: Finished difference. Result has 94 places, 75 transitions, 259 flow [2023-09-01 11:10:35,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=259, PETRI_PLACES=94, PETRI_TRANSITIONS=75} [2023-09-01 11:10:35,664 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 6 predicate places. [2023-09-01 11:10:35,665 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 75 transitions, 259 flow [2023-09-01 11:10:35,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 265.46153846153845) internal successors, (3451), 13 states have internal predecessors, (3451), 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 11:10:35,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:10:35,666 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 11:10:35,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-09-01 11:10:35,869 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 11:10:35,870 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:10:35,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:10:35,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1545885414, now seen corresponding path program 3 times [2023-09-01 11:10:35,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:10:35,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591299684] [2023-09-01 11:10:35,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:10:35,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:10:35,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:10:35,893 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 11:10:35,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:10:35,927 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 11:10:35,929 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 11:10:35,929 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 11:10:35,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 11:10:35,929 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 11:10:35,929 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 11:10:35,930 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 11:10:35,930 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-09-01 11:10:35,956 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 11:10:35,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 336 places, 400 transitions, 844 flow [2023-09-01 11:10:36,046 INFO L130 PetriNetUnfolder]: 157/878 cut-off events. [2023-09-01 11:10:36,046 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-09-01 11:10:36,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 933 conditions, 878 events. 157/878 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 4177 event pairs, 6 based on Foata normal form. 0/712 useless extension candidates. Maximal degree in co-relation 639. Up to 32 conditions per place. [2023-09-01 11:10:36,053 INFO L82 GeneralOperation]: Start removeDead. Operand has 336 places, 400 transitions, 844 flow [2023-09-01 11:10:36,057 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 336 places, 400 transitions, 844 flow [2023-09-01 11:10:36,058 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:10:36,058 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 336 places, 400 transitions, 844 flow [2023-09-01 11:10:36,058 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 336 places, 400 transitions, 844 flow [2023-09-01 11:10:36,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 336 places, 400 transitions, 844 flow [2023-09-01 11:10:36,143 INFO L130 PetriNetUnfolder]: 157/878 cut-off events. [2023-09-01 11:10:36,143 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-09-01 11:10:36,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 933 conditions, 878 events. 157/878 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 4177 event pairs, 6 based on Foata normal form. 0/712 useless extension candidates. Maximal degree in co-relation 639. Up to 32 conditions per place. [2023-09-01 11:10:36,178 INFO L119 LiptonReduction]: Number of co-enabled transitions 101456 [2023-09-01 11:10:39,357 INFO L134 LiptonReduction]: Checked pairs total: 181238 [2023-09-01 11:10:39,358 INFO L136 LiptonReduction]: Total number of compositions: 324 [2023-09-01 11:10:39,360 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 11:10:39,361 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;@32a1c1f9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:10:39,361 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 11:10:39,371 INFO L130 PetriNetUnfolder]: 88/256 cut-off events. [2023-09-01 11:10:39,372 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-09-01 11:10:39,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:10:39,372 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:10:39,372 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:10:39,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:10:39,373 INFO L85 PathProgramCache]: Analyzing trace with hash -154404429, now seen corresponding path program 1 times [2023-09-01 11:10:39,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:10:39,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235570316] [2023-09-01 11:10:39,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:10:39,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:10:39,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:10:39,494 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 11:10:39,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:10:39,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235570316] [2023-09-01 11:10:39,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235570316] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:10:39,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:10:39,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 11:10:39,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368016265] [2023-09-01 11:10:39,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:10:39,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 11:10:39,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:10:39,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 11:10:39,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 11:10:39,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 724 [2023-09-01 11:10:39,503 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 161 transitions, 366 flow. Second operand has 3 states, 3 states have (on average 322.6666666666667) internal successors, (968), 3 states have internal predecessors, (968), 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 11:10:39,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:10:39,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 724 [2023-09-01 11:10:39,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand