./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_87-lists_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_87-lists_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 54b86d528cae3f36fe49030118864df9a90bfa303271cb05b13ff89a15d513aa --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 11:17:13,105 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 11:17:13,107 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 11:17:13,150 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 11:17:13,150 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 11:17:13,153 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 11:17:13,155 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 11:17:13,158 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 11:17:13,160 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 11:17:13,164 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 11:17:13,165 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 11:17:13,167 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 11:17:13,168 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 11:17:13,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 11:17:13,171 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 11:17:13,176 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 11:17:13,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 11:17:13,178 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 11:17:13,179 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 11:17:13,184 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 11:17:13,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 11:17:13,186 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 11:17:13,187 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 11:17:13,194 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 11:17:13,201 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 11:17:13,201 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 11:17:13,201 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 11:17:13,203 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 11:17:13,203 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 11:17:13,205 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 11:17:13,205 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 11:17:13,206 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 11:17:13,207 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 11:17:13,208 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 11:17:13,208 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 11:17:13,208 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 11:17:13,209 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 11:17:13,209 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 11:17:13,209 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 11:17:13,210 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 11:17:13,210 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 11:17:13,212 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 11:17:13,242 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 11:17:13,243 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 11:17:13,244 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 11:17:13,244 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 11:17:13,245 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 11:17:13,245 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 11:17:13,245 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 11:17:13,246 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 11:17:13,246 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 11:17:13,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 11:17:13,247 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 11:17:13,247 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 11:17:13,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 11:17:13,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 11:17:13,247 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 11:17:13,247 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 11:17:13,248 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 11:17:13,248 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 11:17:13,248 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 11:17:13,248 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 11:17:13,248 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 11:17:13,249 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 11:17:13,249 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 11:17:13,249 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 11:17:13,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 11:17:13,249 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 11:17:13,249 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 11:17:13,250 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 11:17:13,250 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 11:17:13,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 11:17:13,250 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 11:17:13,250 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 11:17:13,251 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 11:17:13,251 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 11:17:13,251 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 11:17:13,251 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54b86d528cae3f36fe49030118864df9a90bfa303271cb05b13ff89a15d513aa Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 11:17:13,545 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 11:17:13,563 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 11:17:13,566 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 11:17:13,567 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 11:17:13,567 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 11:17:13,569 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_87-lists_racefree.i [2023-09-01 11:17:14,749 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 11:17:15,045 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 11:17:15,046 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_87-lists_racefree.i [2023-09-01 11:17:15,068 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2dbfa086d/02f86f0d9bf24a18b54c9f5fdce422c8/FLAG0d05fee42 [2023-09-01 11:17:15,084 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2dbfa086d/02f86f0d9bf24a18b54c9f5fdce422c8 [2023-09-01 11:17:15,088 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 11:17:15,089 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 11:17:15,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 11:17:15,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 11:17:15,095 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 11:17:15,095 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 11:17:15" (1/1) ... [2023-09-01 11:17:15,096 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46d5e47a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:17:15, skipping insertion in model container [2023-09-01 11:17:15,096 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 11:17:15" (1/1) ... [2023-09-01 11:17:15,103 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 11:17:15,154 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 11:17:15,584 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_87-lists_racefree.i[47038,47051] [2023-09-01 11:17:15,628 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 11:17:15,687 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 11:17:15,716 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_87-lists_racefree.i[47038,47051] [2023-09-01 11:17:15,736 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 11:17:15,814 INFO L208 MainTranslator]: Completed translation [2023-09-01 11:17:15,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:17:15 WrapperNode [2023-09-01 11:17:15,814 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 11:17:15,816 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 11:17:15,816 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 11:17:15,816 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 11:17:15,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:17:15" (1/1) ... [2023-09-01 11:17:15,855 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:17:15" (1/1) ... [2023-09-01 11:17:15,884 INFO L138 Inliner]: procedures = 278, calls = 60, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 228 [2023-09-01 11:17:15,884 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 11:17:15,885 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 11:17:15,885 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 11:17:15,885 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 11:17:15,899 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:17:15" (1/1) ... [2023-09-01 11:17:15,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:17:15" (1/1) ... [2023-09-01 11:17:15,906 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:17:15" (1/1) ... [2023-09-01 11:17:15,917 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:17:15" (1/1) ... [2023-09-01 11:17:15,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:17:15" (1/1) ... [2023-09-01 11:17:15,941 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:17:15" (1/1) ... [2023-09-01 11:17:15,945 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:17:15" (1/1) ... [2023-09-01 11:17:15,946 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:17:15" (1/1) ... [2023-09-01 11:17:15,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 11:17:15,957 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 11:17:15,957 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 11:17:15,957 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 11:17:15,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:17:15" (1/1) ... [2023-09-01 11:17:15,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 11:17:15,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:17:15,986 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 11:17:16,000 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 11:17:16,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 11:17:16,026 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-09-01 11:17:16,026 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-09-01 11:17:16,026 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-09-01 11:17:16,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 11:17:16,026 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 11:17:16,027 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-09-01 11:17:16,027 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-09-01 11:17:16,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 11:17:16,027 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 11:17:16,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 11:17:16,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 11:17:16,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-09-01 11:17:16,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 11:17:16,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 11:17:16,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 11:17:16,030 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 11:17:16,154 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 11:17:16,156 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 11:17:16,556 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 11:17:16,569 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 11:17:16,569 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-09-01 11:17:16,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 11:17:16 BoogieIcfgContainer [2023-09-01 11:17:16,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 11:17:16,576 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 11:17:16,576 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 11:17:16,579 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 11:17:16,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 11:17:15" (1/3) ... [2023-09-01 11:17:16,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@701a7c63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 11:17:16, skipping insertion in model container [2023-09-01 11:17:16,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:17:15" (2/3) ... [2023-09-01 11:17:16,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@701a7c63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 11:17:16, skipping insertion in model container [2023-09-01 11:17:16,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 11:17:16" (3/3) ... [2023-09-01 11:17:16,581 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_87-lists_racefree.i [2023-09-01 11:17:16,589 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 11:17:16,600 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 11:17:16,600 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 11:17:16,600 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 11:17:16,755 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 11:17:16,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 229 transitions, 480 flow [2023-09-01 11:17:16,904 INFO L130 PetriNetUnfolder]: 54/427 cut-off events. [2023-09-01 11:17:16,905 INFO L131 PetriNetUnfolder]: For 8/16 co-relation queries the response was YES. [2023-09-01 11:17:16,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 427 events. 54/427 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1691 event pairs, 0 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 219. Up to 8 conditions per place. [2023-09-01 11:17:16,921 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 229 transitions, 480 flow [2023-09-01 11:17:16,927 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 227 transitions, 470 flow [2023-09-01 11:17:16,930 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:17:16,937 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 209 places, 227 transitions, 470 flow [2023-09-01 11:17:16,940 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 209 places, 227 transitions, 470 flow [2023-09-01 11:17:16,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 227 transitions, 470 flow [2023-09-01 11:17:17,008 INFO L130 PetriNetUnfolder]: 50/415 cut-off events. [2023-09-01 11:17:17,009 INFO L131 PetriNetUnfolder]: For 4/8 co-relation queries the response was YES. [2023-09-01 11:17:17,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 431 conditions, 415 events. 50/415 cut-off events. For 4/8 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1613 event pairs, 0 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 207. Up to 8 conditions per place. [2023-09-01 11:17:17,022 INFO L119 LiptonReduction]: Number of co-enabled transitions 15336 [2023-09-01 11:17:22,367 INFO L134 LiptonReduction]: Checked pairs total: 24023 [2023-09-01 11:17:22,368 INFO L136 LiptonReduction]: Total number of compositions: 181 [2023-09-01 11:17:22,380 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 11:17:22,386 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;@62e6e56b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:17:22,386 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-09-01 11:17:22,391 INFO L130 PetriNetUnfolder]: 1/26 cut-off events. [2023-09-01 11:17:22,391 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 11:17:22,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:17:22,392 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-09-01 11:17:22,392 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:17:22,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:17:22,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1192865422, now seen corresponding path program 1 times [2023-09-01 11:17:22,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:17:22,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504089113] [2023-09-01 11:17:22,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:17:22,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:17:22,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:17:22,622 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 11:17:22,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:17:22,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504089113] [2023-09-01 11:17:22,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504089113] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:17:22,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:17:22,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 11:17:22,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679343967] [2023-09-01 11:17:22,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:17:22,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 11:17:22,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:17:22,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 11:17:22,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 11:17:22,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 410 [2023-09-01 11:17:22,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 66 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 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 11:17:22,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:17:22,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 410 [2023-09-01 11:17:22,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:17:23,220 INFO L130 PetriNetUnfolder]: 2806/4839 cut-off events. [2023-09-01 11:17:23,221 INFO L131 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2023-09-01 11:17:23,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9314 conditions, 4839 events. 2806/4839 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 28373 event pairs, 2599 based on Foata normal form. 240/4248 useless extension candidates. Maximal degree in co-relation 8300. Up to 4402 conditions per place. [2023-09-01 11:17:23,234 INFO L137 encePairwiseOnDemand]: 396/410 looper letters, 36 selfloop transitions, 2 changer transitions 9/56 dead transitions. [2023-09-01 11:17:23,234 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 222 flow [2023-09-01 11:17:23,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 11:17:23,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 11:17:23,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 662 transitions. [2023-09-01 11:17:23,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5382113821138211 [2023-09-01 11:17:23,299 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 662 transitions. [2023-09-01 11:17:23,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 662 transitions. [2023-09-01 11:17:23,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:17:23,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 662 transitions. [2023-09-01 11:17:23,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 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 11:17:23,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 410.0) internal successors, (1640), 4 states have internal predecessors, (1640), 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 11:17:23,316 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 410.0) internal successors, (1640), 4 states have internal predecessors, (1640), 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 11:17:23,318 INFO L175 Difference]: Start difference. First operand has 55 places, 66 transitions, 148 flow. Second operand 3 states and 662 transitions. [2023-09-01 11:17:23,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 222 flow [2023-09-01 11:17:23,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 56 transitions, 222 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 11:17:23,343 INFO L231 Difference]: Finished difference. Result has 58 places, 47 transitions, 114 flow [2023-09-01 11:17:23,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=58, PETRI_TRANSITIONS=47} [2023-09-01 11:17:23,348 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 3 predicate places. [2023-09-01 11:17:23,348 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 47 transitions, 114 flow [2023-09-01 11:17:23,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 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 11:17:23,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:17:23,349 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-09-01 11:17:23,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 11:17:23,350 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:17:23,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:17:23,350 INFO L85 PathProgramCache]: Analyzing trace with hash 450522637, now seen corresponding path program 1 times [2023-09-01 11:17:23,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:17:23,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117563483] [2023-09-01 11:17:23,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:17:23,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:17:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:17:23,522 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 11:17:23,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:17:23,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117563483] [2023-09-01 11:17:23,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117563483] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:17:23,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076798862] [2023-09-01 11:17:23,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:17:23,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:17:23,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:17:23,533 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 11:17:23,539 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 11:17:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:17:23,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 11:17:23,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:17:23,696 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 11:17:23,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:17:23,710 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 11:17:23,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076798862] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:17:23,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:17:23,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 11:17:23,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242436829] [2023-09-01 11:17:23,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:17:23,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 11:17:23,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:17:23,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 11:17:23,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 11:17:23,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 410 [2023-09-01 11:17:23,746 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 47 transitions, 114 flow. Second operand has 7 states, 7 states have (on average 201.57142857142858) internal successors, (1411), 7 states have internal predecessors, (1411), 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 11:17:23,746 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:17:23,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 410 [2023-09-01 11:17:23,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:17:24,136 INFO L130 PetriNetUnfolder]: 1126/2034 cut-off events. [2023-09-01 11:17:24,137 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 11:17:24,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3909 conditions, 2034 events. 1126/2034 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 10411 event pairs, 1053 based on Foata normal form. 0/1722 useless extension candidates. Maximal degree in co-relation 3896. Up to 1829 conditions per place. [2023-09-01 11:17:24,147 INFO L137 encePairwiseOnDemand]: 407/410 looper letters, 36 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2023-09-01 11:17:24,147 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 50 transitions, 208 flow [2023-09-01 11:17:24,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 11:17:24,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 11:17:24,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1244 transitions. [2023-09-01 11:17:24,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5056910569105691 [2023-09-01 11:17:24,151 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1244 transitions. [2023-09-01 11:17:24,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1244 transitions. [2023-09-01 11:17:24,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:17:24,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1244 transitions. [2023-09-01 11:17:24,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 207.33333333333334) internal successors, (1244), 6 states have internal predecessors, (1244), 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 11:17:24,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 410.0) internal successors, (2870), 7 states have internal predecessors, (2870), 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 11:17:24,160 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 410.0) internal successors, (2870), 7 states have internal predecessors, (2870), 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 11:17:24,160 INFO L175 Difference]: Start difference. First operand has 58 places, 47 transitions, 114 flow. Second operand 6 states and 1244 transitions. [2023-09-01 11:17:24,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 50 transitions, 208 flow [2023-09-01 11:17:24,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 50 transitions, 204 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 11:17:24,162 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 146 flow [2023-09-01 11:17:24,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, 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 11:17:24,163 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 3 predicate places. [2023-09-01 11:17:24,164 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 146 flow [2023-09-01 11:17:24,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 201.57142857142858) internal successors, (1411), 7 states have internal predecessors, (1411), 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 11:17:24,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:17:24,165 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-09-01 11:17:24,176 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 11:17:24,376 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 11:17:24,376 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:17:24,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:17:24,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1554636750, now seen corresponding path program 2 times [2023-09-01 11:17:24,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:17:24,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075257466] [2023-09-01 11:17:24,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:17:24,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:17:24,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:17:24,634 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 11:17:24,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:17:24,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075257466] [2023-09-01 11:17:24,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075257466] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:17:24,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824362619] [2023-09-01 11:17:24,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:17:24,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:17:24,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:17:24,637 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 11:17:24,663 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 11:17:24,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:17:24,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:17:24,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 11:17:24,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:17:24,821 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 11:17:24,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:17:24,878 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 11:17:24,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824362619] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:17:24,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:17:24,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 11:17:24,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21133077] [2023-09-01 11:17:24,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:17:24,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:17:24,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:17:24,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:17:24,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 11:17:24,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 410 [2023-09-01 11:17:24,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 146 flow. Second operand has 13 states, 13 states have (on average 201.30769230769232) internal successors, (2617), 13 states have internal predecessors, (2617), 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 11:17:24,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:17:24,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 410 [2023-09-01 11:17:24,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:17:25,254 INFO L130 PetriNetUnfolder]: 1126/2040 cut-off events. [2023-09-01 11:17:25,254 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2023-09-01 11:17:25,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3946 conditions, 2040 events. 1126/2040 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 10403 event pairs, 1053 based on Foata normal form. 6/1735 useless extension candidates. Maximal degree in co-relation 3887. Up to 1829 conditions per place. [2023-09-01 11:17:25,263 INFO L137 encePairwiseOnDemand]: 407/410 looper letters, 36 selfloop transitions, 11 changer transitions 0/56 dead transitions. [2023-09-01 11:17:25,263 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 56 transitions, 276 flow [2023-09-01 11:17:25,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:17:25,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:17:25,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2453 transitions. [2023-09-01 11:17:25,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49857723577235774 [2023-09-01 11:17:25,270 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2453 transitions. [2023-09-01 11:17:25,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2453 transitions. [2023-09-01 11:17:25,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:17:25,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2453 transitions. [2023-09-01 11:17:25,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 204.41666666666666) internal successors, (2453), 12 states have internal predecessors, (2453), 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 11:17:25,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 410.0) internal successors, (5330), 13 states have internal predecessors, (5330), 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 11:17:25,289 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 410.0) internal successors, (5330), 13 states have internal predecessors, (5330), 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 11:17:25,289 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 146 flow. Second operand 12 states and 2453 transitions. [2023-09-01 11:17:25,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 56 transitions, 276 flow [2023-09-01 11:17:25,291 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 11:17:25,292 INFO L231 Difference]: Finished difference. Result has 74 places, 56 transitions, 216 flow [2023-09-01 11:17:25,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, 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 11:17:25,293 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 19 predicate places. [2023-09-01 11:17:25,293 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 56 transitions, 216 flow [2023-09-01 11:17:25,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 201.30769230769232) internal successors, (2617), 13 states have internal predecessors, (2617), 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 11:17:25,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:17:25,295 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-09-01 11:17:25,304 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 11:17:25,501 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 11:17:25,501 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:17:25,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:17:25,502 INFO L85 PathProgramCache]: Analyzing trace with hash 279626322, now seen corresponding path program 3 times [2023-09-01 11:17:25,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:17:25,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150320967] [2023-09-01 11:17:25,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:17:25,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:17:25,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:17:25,943 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:17:25,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:17:25,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150320967] [2023-09-01 11:17:25,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150320967] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:17:25,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953162716] [2023-09-01 11:17:25,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:17:25,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:17:25,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:17:25,945 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 11:17:25,969 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 11:20:37,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 11:20:37,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:20:37,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 11:20:37,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:20:37,640 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:20:37,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:20:37,819 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:20:37,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953162716] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:20:37,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:20:37,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-09-01 11:20:37,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799025794] [2023-09-01 11:20:37,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:20:37,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 11:20:37,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:20:37,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 11:20:37,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-09-01 11:20:37,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 410 [2023-09-01 11:20:37,912 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 56 transitions, 216 flow. Second operand has 25 states, 25 states have (on average 201.16) internal successors, (5029), 25 states have internal predecessors, (5029), 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 11:20:37,912 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:20:37,912 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 410 [2023-09-01 11:20:37,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:20:38,295 INFO L130 PetriNetUnfolder]: 1126/2052 cut-off events. [2023-09-01 11:20:38,295 INFO L131 PetriNetUnfolder]: For 470/470 co-relation queries the response was YES. [2023-09-01 11:20:38,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4030 conditions, 2052 events. 1126/2052 cut-off events. For 470/470 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 10403 event pairs, 1053 based on Foata normal form. 12/1753 useless extension candidates. Maximal degree in co-relation 3893. Up to 1829 conditions per place. [2023-09-01 11:20:38,306 INFO L137 encePairwiseOnDemand]: 407/410 looper letters, 36 selfloop transitions, 23 changer transitions 0/68 dead transitions. [2023-09-01 11:20:38,307 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 68 transitions, 430 flow [2023-09-01 11:20:38,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 11:20:38,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 11:20:38,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4871 transitions. [2023-09-01 11:20:38,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.495020325203252 [2023-09-01 11:20:38,318 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4871 transitions. [2023-09-01 11:20:38,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4871 transitions. [2023-09-01 11:20:38,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:20:38,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4871 transitions. [2023-09-01 11:20:38,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 202.95833333333334) internal successors, (4871), 24 states have internal predecessors, (4871), 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 11:20:38,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 410.0) internal successors, (10250), 25 states have internal predecessors, (10250), 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 11:20:38,348 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 410.0) internal successors, (10250), 25 states have internal predecessors, (10250), 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 11:20:38,349 INFO L175 Difference]: Start difference. First operand has 74 places, 56 transitions, 216 flow. Second operand 24 states and 4871 transitions. [2023-09-01 11:20:38,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 68 transitions, 430 flow [2023-09-01 11:20:38,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 68 transitions, 358 flow, removed 31 selfloop flow, removed 5 redundant places. [2023-09-01 11:20:38,353 INFO L231 Difference]: Finished difference. Result has 104 places, 68 transitions, 336 flow [2023-09-01 11:20:38,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=336, PETRI_PLACES=104, PETRI_TRANSITIONS=68} [2023-09-01 11:20:38,354 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 49 predicate places. [2023-09-01 11:20:38,354 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 68 transitions, 336 flow [2023-09-01 11:20:38,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 201.16) internal successors, (5029), 25 states have internal predecessors, (5029), 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 11:20:38,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:20:38,356 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 2, 1, 1, 1, 1, 1] [2023-09-01 11:20:38,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 11:20:38,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:20:38,572 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:20:38,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:20:38,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1192738450, now seen corresponding path program 4 times [2023-09-01 11:20:38,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:20:38,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899320104] [2023-09-01 11:20:38,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:20:38,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:20:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:20:39,648 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:20:39,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:20:39,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899320104] [2023-09-01 11:20:39,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899320104] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:20:39,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610466619] [2023-09-01 11:20:39,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:20:39,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:20:39,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:20:39,653 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 11:20:39,657 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 11:20:40,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:20:40,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:20:40,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 1569 conjuncts, 24 conjunts are in the unsatisfiable core [2023-09-01 11:20:40,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:20:40,116 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:20:40,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:20:40,737 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:20:40,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610466619] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:20:40,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:20:40,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-09-01 11:20:40,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495000692] [2023-09-01 11:20:40,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:20:40,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-09-01 11:20:40,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:20:40,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-09-01 11:20:40,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-09-01 11:20:40,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 410 [2023-09-01 11:20:40,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 68 transitions, 336 flow. Second operand has 49 states, 49 states have (on average 201.08163265306123) internal successors, (9853), 49 states have internal predecessors, (9853), 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 11:20:40,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:20:40,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 410 [2023-09-01 11:20:40,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:20:41,444 INFO L130 PetriNetUnfolder]: 1126/2076 cut-off events. [2023-09-01 11:20:41,445 INFO L131 PetriNetUnfolder]: For 5240/5240 co-relation queries the response was YES. [2023-09-01 11:20:41,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4174 conditions, 2076 events. 1126/2076 cut-off events. For 5240/5240 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 10410 event pairs, 1053 based on Foata normal form. 24/1789 useless extension candidates. Maximal degree in co-relation 3905. Up to 1829 conditions per place. [2023-09-01 11:20:41,457 INFO L137 encePairwiseOnDemand]: 407/410 looper letters, 36 selfloop transitions, 47 changer transitions 0/92 dead transitions. [2023-09-01 11:20:41,457 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 92 transitions, 694 flow [2023-09-01 11:20:41,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-09-01 11:20:41,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-09-01 11:20:41,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 9707 transitions. [2023-09-01 11:20:41,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49324186991869917 [2023-09-01 11:20:41,476 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 9707 transitions. [2023-09-01 11:20:41,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 9707 transitions. [2023-09-01 11:20:41,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:20:41,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 9707 transitions. [2023-09-01 11:20:41,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 202.22916666666666) internal successors, (9707), 48 states have internal predecessors, (9707), 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 11:20:41,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 410.0) internal successors, (20090), 49 states have internal predecessors, (20090), 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 11:20:41,537 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 410.0) internal successors, (20090), 49 states have internal predecessors, (20090), 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 11:20:41,537 INFO L175 Difference]: Start difference. First operand has 104 places, 68 transitions, 336 flow. Second operand 48 states and 9707 transitions. [2023-09-01 11:20:41,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 92 transitions, 694 flow [2023-09-01 11:20:41,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 92 transitions, 550 flow, removed 61 selfloop flow, removed 11 redundant places. [2023-09-01 11:20:41,588 INFO L231 Difference]: Finished difference. Result has 164 places, 92 transitions, 576 flow [2023-09-01 11:20:41,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=576, PETRI_PLACES=164, PETRI_TRANSITIONS=92} [2023-09-01 11:20:41,589 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 109 predicate places. [2023-09-01 11:20:41,589 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 92 transitions, 576 flow [2023-09-01 11:20:41,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 201.08163265306123) internal successors, (9853), 49 states have internal predecessors, (9853), 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 11:20:41,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:20:41,592 INFO L208 CegarLoopForPetriNet]: trace histogram [46, 2, 1, 1, 1, 1, 1] [2023-09-01 11:20:41,601 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 11:20:41,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:20:41,793 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:20:41,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:20:41,793 INFO L85 PathProgramCache]: Analyzing trace with hash 553162514, now seen corresponding path program 5 times [2023-09-01 11:20:41,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:20:41,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594390135] [2023-09-01 11:20:41,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:20:41,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:20:41,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:20:45,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:20:45,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:20:45,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594390135] [2023-09-01 11:20:45,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594390135] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:20:45,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132186785] [2023-09-01 11:20:45,145 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 11:20:45,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:20:45,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:20:45,146 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 11:20:45,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process Killed by 15