./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_82-list_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --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_82-list_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 6ac894f5c6207d1329786eb676509b79ca36f8c33f880cc59ffa30652ab92765 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 18:12:33,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 18:12:33,106 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 18:12:33,140 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 18:12:33,140 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 18:12:33,143 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 18:12:33,145 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 18:12:33,148 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 18:12:33,150 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 18:12:33,155 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 18:12:33,156 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 18:12:33,158 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 18:12:33,159 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 18:12:33,161 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 18:12:33,162 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 18:12:33,167 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 18:12:33,168 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 18:12:33,170 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 18:12:33,172 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 18:12:33,177 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 18:12:33,178 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 18:12:33,179 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 18:12:33,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 18:12:33,181 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 18:12:33,188 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 18:12:33,188 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 18:12:33,188 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 18:12:33,190 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 18:12:33,191 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 18:12:33,192 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 18:12:33,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 18:12:33,194 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 18:12:33,195 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 18:12:33,196 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 18:12:33,197 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 18:12:33,197 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 18:12:33,198 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 18:12:33,198 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 18:12:33,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 18:12:33,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 18:12:33,199 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 18:12:33,201 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 18:12:33,238 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 18:12:33,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 18:12:33,240 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 18:12:33,240 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 18:12:33,241 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 18:12:33,241 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 18:12:33,241 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 18:12:33,242 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 18:12:33,242 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 18:12:33,242 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 18:12:33,243 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 18:12:33,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 18:12:33,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 18:12:33,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 18:12:33,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 18:12:33,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 18:12:33,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 18:12:33,244 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 18:12:33,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 18:12:33,245 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 18:12:33,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 18:12:33,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 18:12:33,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 18:12:33,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 18:12:33,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 18:12:33,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 18:12:33,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 18:12:33,246 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 18:12:33,247 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 18:12:33,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 18:12:33,247 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 18:12:33,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 18:12:33,247 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 18:12:33,248 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 18:12:33,248 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 18:12:33,248 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ac894f5c6207d1329786eb676509b79ca36f8c33f880cc59ffa30652ab92765 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 18:12:33,592 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 18:12:33,615 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 18:12:33,617 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 18:12:33,618 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 18:12:33,619 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 18:12:33,620 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_82-list_racefree.i [2023-08-30 18:12:34,913 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 18:12:35,183 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 18:12:35,184 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_82-list_racefree.i [2023-08-30 18:12:35,198 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/019d3c030/bdaa9ba1a819460bae5311a2c3a4cd98/FLAG5e341ea9d [2023-08-30 18:12:35,213 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/019d3c030/bdaa9ba1a819460bae5311a2c3a4cd98 [2023-08-30 18:12:35,215 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 18:12:35,216 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 18:12:35,217 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 18:12:35,217 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 18:12:35,225 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 18:12:35,225 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:12:35" (1/1) ... [2023-08-30 18:12:35,226 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d63f030 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:12:35, skipping insertion in model container [2023-08-30 18:12:35,226 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:12:35" (1/1) ... [2023-08-30 18:12:35,231 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 18:12:35,277 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 18:12:35,648 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_82-list_racefree.i[47038,47051] [2023-08-30 18:12:35,688 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 18:12:35,704 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 18:12:35,740 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_82-list_racefree.i[47038,47051] [2023-08-30 18:12:35,758 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 18:12:35,832 INFO L208 MainTranslator]: Completed translation [2023-08-30 18:12:35,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:12:35 WrapperNode [2023-08-30 18:12:35,833 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 18:12:35,834 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 18:12:35,834 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 18:12:35,834 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 18:12:35,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:12:35" (1/1) ... [2023-08-30 18:12:35,863 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:12:35" (1/1) ... [2023-08-30 18:12:35,905 INFO L138 Inliner]: procedures = 278, calls = 61, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 208 [2023-08-30 18:12:35,906 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 18:12:35,907 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 18:12:35,907 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 18:12:35,907 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 18:12:35,914 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:12:35" (1/1) ... [2023-08-30 18:12:35,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:12:35" (1/1) ... [2023-08-30 18:12:35,919 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:12:35" (1/1) ... [2023-08-30 18:12:35,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:12:35" (1/1) ... [2023-08-30 18:12:35,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:12:35" (1/1) ... [2023-08-30 18:12:35,936 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:12:35" (1/1) ... [2023-08-30 18:12:35,939 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:12:35" (1/1) ... [2023-08-30 18:12:35,940 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:12:35" (1/1) ... [2023-08-30 18:12:35,944 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 18:12:35,945 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 18:12:35,945 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 18:12:35,945 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 18:12:35,946 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:12:35" (1/1) ... [2023-08-30 18:12:35,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 18:12:35,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:12:35,978 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) [2023-08-30 18:12:35,997 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 [2023-08-30 18:12:36,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 18:12:36,023 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-30 18:12:36,024 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-08-30 18:12:36,024 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-08-30 18:12:36,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 18:12:36,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 18:12:36,024 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-30 18:12:36,024 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-30 18:12:36,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 18:12:36,025 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 18:12:36,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 18:12:36,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 18:12:36,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-30 18:12:36,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 18:12:36,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 18:12:36,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 18:12:36,027 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 18:12:36,231 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 18:12:36,233 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 18:12:36,609 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 18:12:36,616 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 18:12:36,617 INFO L302 CfgBuilder]: Removed 15 assume(true) statements. [2023-08-30 18:12:36,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:12:36 BoogieIcfgContainer [2023-08-30 18:12:36,619 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 18:12:36,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 18:12:36,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 18:12:36,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 18:12:36,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:12:35" (1/3) ... [2023-08-30 18:12:36,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47610dad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:12:36, skipping insertion in model container [2023-08-30 18:12:36,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:12:35" (2/3) ... [2023-08-30 18:12:36,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47610dad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:12:36, skipping insertion in model container [2023-08-30 18:12:36,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:12:36" (3/3) ... [2023-08-30 18:12:36,626 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_82-list_racefree.i [2023-08-30 18:12:36,633 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 18:12:36,641 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 18:12:36,642 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 18:12:36,642 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 18:12:36,744 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 18:12:36,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 210 transitions, 442 flow [2023-08-30 18:12:36,965 INFO L130 PetriNetUnfolder]: 52/402 cut-off events. [2023-08-30 18:12:36,966 INFO L131 PetriNetUnfolder]: For 8/15 co-relation queries the response was YES. [2023-08-30 18:12:36,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 402 events. 52/402 cut-off events. For 8/15 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1594 event pairs, 0 based on Foata normal form. 0/341 useless extension candidates. Maximal degree in co-relation 206. Up to 8 conditions per place. [2023-08-30 18:12:36,977 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 210 transitions, 442 flow [2023-08-30 18:12:36,987 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 191 places, 207 transitions, 428 flow [2023-08-30 18:12:36,990 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:12:36,998 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 191 places, 207 transitions, 428 flow [2023-08-30 18:12:37,001 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 191 places, 207 transitions, 428 flow [2023-08-30 18:12:37,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 207 transitions, 428 flow [2023-08-30 18:12:37,061 INFO L130 PetriNetUnfolder]: 48/389 cut-off events. [2023-08-30 18:12:37,061 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 18:12:37,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 389 events. 48/389 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1505 event pairs, 0 based on Foata normal form. 0/328 useless extension candidates. Maximal degree in co-relation 194. Up to 8 conditions per place. [2023-08-30 18:12:37,075 INFO L119 LiptonReduction]: Number of co-enabled transitions 12890 [2023-08-30 18:12:43,456 INFO L134 LiptonReduction]: Checked pairs total: 23053 [2023-08-30 18:12:43,456 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-08-30 18:12:43,467 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 18:12:43,473 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;@3e1503b6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:12:43,473 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-30 18:12:43,483 INFO L130 PetriNetUnfolder]: 7/61 cut-off events. [2023-08-30 18:12:43,483 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:12:43,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:12:43,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:12:43,485 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:12:43,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:12:43,489 INFO L85 PathProgramCache]: Analyzing trace with hash -139620747, now seen corresponding path program 1 times [2023-08-30 18:12:43,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:12:43,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192129616] [2023-08-30 18:12:43,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:43,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:12:43,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:43,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:12:43,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:12:43,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192129616] [2023-08-30 18:12:43,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192129616] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:12:43,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:12:43,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 18:12:43,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222550398] [2023-08-30 18:12:43,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:12:43,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:12:43,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:12:43,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:12:43,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 18:12:43,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 377 [2023-08-30 18:12:43,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 60 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 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) [2023-08-30 18:12:43,909 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:12:43,909 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 377 [2023-08-30 18:12:43,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:12:44,417 INFO L130 PetriNetUnfolder]: 2281/3886 cut-off events. [2023-08-30 18:12:44,417 INFO L131 PetriNetUnfolder]: For 103/103 co-relation queries the response was YES. [2023-08-30 18:12:44,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7523 conditions, 3886 events. 2281/3886 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 21980 event pairs, 1943 based on Foata normal form. 284/3504 useless extension candidates. Maximal degree in co-relation 6827. Up to 3567 conditions per place. [2023-08-30 18:12:44,431 INFO L137 encePairwiseOnDemand]: 363/377 looper letters, 35 selfloop transitions, 2 changer transitions 15/56 dead transitions. [2023-08-30 18:12:44,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 56 transitions, 224 flow [2023-08-30 18:12:44,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:12:44,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:12:44,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 610 transitions. [2023-08-30 18:12:44,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5393457117595049 [2023-08-30 18:12:44,450 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 610 transitions. [2023-08-30 18:12:44,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 610 transitions. [2023-08-30 18:12:44,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:12:44,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 610 transitions. [2023-08-30 18:12:44,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 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) [2023-08-30 18:12:44,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 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) [2023-08-30 18:12:44,469 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 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) [2023-08-30 18:12:44,471 INFO L175 Difference]: Start difference. First operand has 50 places, 60 transitions, 134 flow. Second operand 3 states and 610 transitions. [2023-08-30 18:12:44,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 56 transitions, 224 flow [2023-08-30 18:12:44,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 56 transitions, 221 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 18:12:44,479 INFO L231 Difference]: Finished difference. Result has 52 places, 35 transitions, 89 flow [2023-08-30 18:12:44,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=52, PETRI_TRANSITIONS=35} [2023-08-30 18:12:44,484 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2023-08-30 18:12:44,485 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 35 transitions, 89 flow [2023-08-30 18:12:44,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 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) [2023-08-30 18:12:44,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:12:44,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:12:44,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 18:12:44,489 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:12:44,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:12:44,497 INFO L85 PathProgramCache]: Analyzing trace with hash 66358163, now seen corresponding path program 1 times [2023-08-30 18:12:44,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:12:44,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810628477] [2023-08-30 18:12:44,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:44,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:12:44,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:44,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:12:44,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:12:44,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810628477] [2023-08-30 18:12:44,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810628477] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:12:44,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947099511] [2023-08-30 18:12:44,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:44,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:12:44,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:12:44,657 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) [2023-08-30 18:12:44,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 18:12:44,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:44,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 18:12:44,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:12:44,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:12:44,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:12:44,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:12:44,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947099511] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:12:44,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:12:44,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 18:12:44,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969182252] [2023-08-30 18:12:44,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:12:44,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 18:12:44,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:12:44,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 18:12:44,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 18:12:44,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 377 [2023-08-30 18:12:44,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 35 transitions, 89 flow. Second operand has 7 states, 7 states have (on average 185.14285714285714) internal successors, (1296), 7 states have internal predecessors, (1296), 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) [2023-08-30 18:12:44,950 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:12:44,950 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 377 [2023-08-30 18:12:44,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:12:44,978 INFO L130 PetriNetUnfolder]: 12/37 cut-off events. [2023-08-30 18:12:44,979 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 18:12:44,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 37 events. 12/37 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 64 event pairs, 1 based on Foata normal form. 7/44 useless extension candidates. Maximal degree in co-relation 88. Up to 26 conditions per place. [2023-08-30 18:12:44,979 INFO L137 encePairwiseOnDemand]: 374/377 looper letters, 0 selfloop transitions, 0 changer transitions 19/19 dead transitions. [2023-08-30 18:12:44,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 19 transitions, 80 flow [2023-08-30 18:12:44,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 18:12:44,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 18:12:44,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 746 transitions. [2023-08-30 18:12:44,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4946949602122016 [2023-08-30 18:12:44,982 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 746 transitions. [2023-08-30 18:12:44,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 746 transitions. [2023-08-30 18:12:44,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:12:44,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 746 transitions. [2023-08-30 18:12:44,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 186.5) internal successors, (746), 4 states have internal predecessors, (746), 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) [2023-08-30 18:12:44,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 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) [2023-08-30 18:12:44,988 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 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) [2023-08-30 18:12:44,988 INFO L175 Difference]: Start difference. First operand has 52 places, 35 transitions, 89 flow. Second operand 4 states and 746 transitions. [2023-08-30 18:12:44,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 19 transitions, 80 flow [2023-08-30 18:12:44,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 19 transitions, 74 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 18:12:44,989 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-30 18:12:44,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=18, PETRI_TRANSITIONS=0} [2023-08-30 18:12:44,990 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -32 predicate places. [2023-08-30 18:12:44,990 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-30 18:12:44,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 185.14285714285714) internal successors, (1296), 7 states have internal predecessors, (1296), 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) [2023-08-30 18:12:44,993 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-08-30 18:12:44,993 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-30 18:12:45,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 18:12:45,200 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 [2023-08-30 18:12:45,200 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 18:12:45,206 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE (1/2) [2023-08-30 18:12:45,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 210 transitions, 442 flow [2023-08-30 18:12:45,250 INFO L130 PetriNetUnfolder]: 52/402 cut-off events. [2023-08-30 18:12:45,251 INFO L131 PetriNetUnfolder]: For 8/15 co-relation queries the response was YES. [2023-08-30 18:12:45,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 402 events. 52/402 cut-off events. For 8/15 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1594 event pairs, 0 based on Foata normal form. 0/341 useless extension candidates. Maximal degree in co-relation 206. Up to 8 conditions per place. [2023-08-30 18:12:45,253 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 210 transitions, 442 flow [2023-08-30 18:12:45,256 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 208 transitions, 432 flow [2023-08-30 18:12:45,256 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:12:45,256 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 208 transitions, 432 flow [2023-08-30 18:12:45,256 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 208 transitions, 432 flow [2023-08-30 18:12:45,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 208 transitions, 432 flow [2023-08-30 18:12:45,290 INFO L130 PetriNetUnfolder]: 48/390 cut-off events. [2023-08-30 18:12:45,291 INFO L131 PetriNetUnfolder]: For 4/7 co-relation queries the response was YES. [2023-08-30 18:12:45,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 406 conditions, 390 events. 48/390 cut-off events. For 4/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1511 event pairs, 0 based on Foata normal form. 0/329 useless extension candidates. Maximal degree in co-relation 194. Up to 8 conditions per place. [2023-08-30 18:12:45,301 INFO L119 LiptonReduction]: Number of co-enabled transitions 12936 [2023-08-30 18:12:51,368 INFO L134 LiptonReduction]: Checked pairs total: 23654 [2023-08-30 18:12:51,369 INFO L136 LiptonReduction]: Total number of compositions: 168 [2023-08-30 18:12:51,371 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 18:12:51,371 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;@3e1503b6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:12:51,372 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-30 18:12:51,374 INFO L130 PetriNetUnfolder]: 0/18 cut-off events. [2023-08-30 18:12:51,375 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:12:51,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:12:51,375 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 18:12:51,375 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:12:51,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:12:51,376 INFO L85 PathProgramCache]: Analyzing trace with hash -713333245, now seen corresponding path program 1 times [2023-08-30 18:12:51,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:12:51,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947500601] [2023-08-30 18:12:51,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:51,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:12:51,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 18:12:51,398 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 18:12:51,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 18:12:51,427 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 18:12:51,427 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 18:12:51,427 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-30 18:12:51,428 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-30 18:12:51,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 18:12:51,428 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 18:12:51,429 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-30 18:12:51,429 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 18:12:51,429 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 18:12:51,476 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-30 18:12:51,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 294 places, 327 transitions, 702 flow [2023-08-30 18:12:51,657 INFO L130 PetriNetUnfolder]: 191/1195 cut-off events. [2023-08-30 18:12:51,657 INFO L131 PetriNetUnfolder]: For 72/107 co-relation queries the response was YES. [2023-08-30 18:12:51,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1292 conditions, 1195 events. 191/1195 cut-off events. For 72/107 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 7398 event pairs, 2 based on Foata normal form. 0/1005 useless extension candidates. Maximal degree in co-relation 755. Up to 32 conditions per place. [2023-08-30 18:12:51,675 INFO L82 GeneralOperation]: Start removeDead. Operand has 294 places, 327 transitions, 702 flow [2023-08-30 18:12:51,684 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 293 places, 326 transitions, 696 flow [2023-08-30 18:12:51,685 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:12:51,685 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 293 places, 326 transitions, 696 flow [2023-08-30 18:12:51,685 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 293 places, 326 transitions, 696 flow [2023-08-30 18:12:51,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 293 places, 326 transitions, 696 flow [2023-08-30 18:12:51,864 INFO L130 PetriNetUnfolder]: 191/1194 cut-off events. [2023-08-30 18:12:51,864 INFO L131 PetriNetUnfolder]: For 71/99 co-relation queries the response was YES. [2023-08-30 18:12:51,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1289 conditions, 1194 events. 191/1194 cut-off events. For 71/99 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 7443 event pairs, 2 based on Foata normal form. 0/1004 useless extension candidates. Maximal degree in co-relation 755. Up to 32 conditions per place. [2023-08-30 18:12:51,918 INFO L119 LiptonReduction]: Number of co-enabled transitions 53432 [2023-08-30 18:12:58,601 INFO L134 LiptonReduction]: Checked pairs total: 118012 [2023-08-30 18:12:58,602 INFO L136 LiptonReduction]: Total number of compositions: 246 [2023-08-30 18:12:58,604 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 18:12:58,609 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;@3e1503b6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:12:58,610 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 18:12:58,615 INFO L130 PetriNetUnfolder]: 11/93 cut-off events. [2023-08-30 18:12:58,616 INFO L131 PetriNetUnfolder]: For 8/12 co-relation queries the response was YES. [2023-08-30 18:12:58,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:12:58,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:12:58,616 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:12:58,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:12:58,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1838717057, now seen corresponding path program 1 times [2023-08-30 18:12:58,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:12:58,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646302232] [2023-08-30 18:12:58,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:58,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:12:58,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:58,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:12:58,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:12:58,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646302232] [2023-08-30 18:12:58,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646302232] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:12:58,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:12:58,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 18:12:58,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968332918] [2023-08-30 18:12:58,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:12:58,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:12:58,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:12:58,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:12:58,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 18:12:58,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 573 [2023-08-30 18:12:58,705 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 114 transitions, 272 flow. Second operand has 3 states, 3 states have (on average 284.0) internal successors, (852), 3 states have internal predecessors, (852), 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) [2023-08-30 18:12:58,705 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:12:58,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 573 [2023-08-30 18:12:58,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:14:17,015 INFO L130 PetriNetUnfolder]: 824347/1098855 cut-off events. [2023-08-30 18:14:17,016 INFO L131 PetriNetUnfolder]: For 46792/46792 co-relation queries the response was YES. [2023-08-30 18:14:19,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2158756 conditions, 1098855 events. 824347/1098855 cut-off events. For 46792/46792 co-relation queries the response was YES. Maximal size of possible extension queue 22543. Compared 8486996 event pairs, 576024 based on Foata normal form. 74880/1019483 useless extension candidates. Maximal degree in co-relation 341991. Up to 1038244 conditions per place. [2023-08-30 18:14:22,216 INFO L137 encePairwiseOnDemand]: 548/573 looper letters, 82 selfloop transitions, 2 changer transitions 0/101 dead transitions. [2023-08-30 18:14:22,216 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 101 transitions, 414 flow [2023-08-30 18:14:22,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:14:22,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:14:22,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 950 transitions. [2023-08-30 18:14:22,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5526468877254218 [2023-08-30 18:14:22,220 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 950 transitions. [2023-08-30 18:14:22,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 950 transitions. [2023-08-30 18:14:22,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:14:22,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 950 transitions. [2023-08-30 18:14:22,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 316.6666666666667) internal successors, (950), 3 states have internal predecessors, (950), 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) [2023-08-30 18:14:22,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 573.0) internal successors, (2292), 4 states have internal predecessors, (2292), 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) [2023-08-30 18:14:22,228 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 573.0) internal successors, (2292), 4 states have internal predecessors, (2292), 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) [2023-08-30 18:14:22,228 INFO L175 Difference]: Start difference. First operand has 89 places, 114 transitions, 272 flow. Second operand 3 states and 950 transitions. [2023-08-30 18:14:22,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 101 transitions, 414 flow [2023-08-30 18:14:22,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 101 transitions, 411 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 18:14:22,370 INFO L231 Difference]: Finished difference. Result has 91 places, 93 transitions, 237 flow [2023-08-30 18:14:22,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=573, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=237, PETRI_PLACES=91, PETRI_TRANSITIONS=93} [2023-08-30 18:14:22,372 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, 2 predicate places. [2023-08-30 18:14:22,372 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 93 transitions, 237 flow [2023-08-30 18:14:22,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 284.0) internal successors, (852), 3 states have internal predecessors, (852), 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) [2023-08-30 18:14:22,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:14:22,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:14:22,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 18:14:22,373 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:14:22,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:14:22,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1165120945, now seen corresponding path program 1 times [2023-08-30 18:14:22,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:14:22,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165927202] [2023-08-30 18:14:22,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:14:22,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:14:22,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:14:22,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:14:22,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:14:22,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165927202] [2023-08-30 18:14:22,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165927202] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:14:22,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337084629] [2023-08-30 18:14:22,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:14:22,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:14:22,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:14:22,442 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) [2023-08-30 18:14:22,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 18:14:22,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:14:22,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 18:14:22,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:14:22,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:14:22,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:14:22,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:14:22,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337084629] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:14:22,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:14:22,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 18:14:22,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722287194] [2023-08-30 18:14:22,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:14:22,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 18:14:22,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:14:22,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 18:14:22,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 18:14:22,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 573 [2023-08-30 18:14:22,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 93 transitions, 237 flow. Second operand has 7 states, 7 states have (on average 283.14285714285717) internal successors, (1982), 7 states have internal predecessors, (1982), 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) [2023-08-30 18:14:22,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:14:22,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 573 [2023-08-30 18:14:22,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:14:22,719 INFO L130 PetriNetUnfolder]: 257/477 cut-off events. [2023-08-30 18:14:22,719 INFO L131 PetriNetUnfolder]: For 80/80 co-relation queries the response was YES. [2023-08-30 18:14:22,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1027 conditions, 477 events. 257/477 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1989 event pairs, 8 based on Foata normal form. 64/541 useless extension candidates. Maximal degree in co-relation 1019. Up to 306 conditions per place. [2023-08-30 18:14:22,721 INFO L137 encePairwiseOnDemand]: 570/573 looper letters, 0 selfloop transitions, 0 changer transitions 45/45 dead transitions. [2023-08-30 18:14:22,721 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 45 transitions, 187 flow [2023-08-30 18:14:22,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:14:22,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:14:22,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1443 transitions. [2023-08-30 18:14:22,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5036649214659686 [2023-08-30 18:14:22,725 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1443 transitions. [2023-08-30 18:14:22,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1443 transitions. [2023-08-30 18:14:22,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:14:22,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1443 transitions. [2023-08-30 18:14:22,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 288.6) internal successors, (1443), 5 states have internal predecessors, (1443), 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) [2023-08-30 18:14:22,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 573.0) internal successors, (3438), 6 states have internal predecessors, (3438), 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) [2023-08-30 18:14:22,736 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 573.0) internal successors, (3438), 6 states have internal predecessors, (3438), 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) [2023-08-30 18:14:22,736 INFO L175 Difference]: Start difference. First operand has 91 places, 93 transitions, 237 flow. Second operand 5 states and 1443 transitions. [2023-08-30 18:14:22,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 45 transitions, 187 flow [2023-08-30 18:14:22,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 45 transitions, 185 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 18:14:22,738 INFO L231 Difference]: Finished difference. Result has 34 places, 0 transitions, 0 flow [2023-08-30 18:14:22,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=573, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=34, PETRI_TRANSITIONS=0} [2023-08-30 18:14:22,739 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -55 predicate places. [2023-08-30 18:14:22,739 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 0 transitions, 0 flow [2023-08-30 18:14:22,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 283.14285714285717) internal successors, (1982), 7 states have internal predecessors, (1982), 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) [2023-08-30 18:14:22,740 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-30 18:14:22,740 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-30 18:14:22,741 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-30 18:14:22,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 18:14:22,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:14:22,952 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 18:14:22,953 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-08-30 18:14:22,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 294 places, 327 transitions, 702 flow [2023-08-30 18:14:23,108 INFO L130 PetriNetUnfolder]: 191/1195 cut-off events. [2023-08-30 18:14:23,109 INFO L131 PetriNetUnfolder]: For 72/107 co-relation queries the response was YES. [2023-08-30 18:14:23,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1292 conditions, 1195 events. 191/1195 cut-off events. For 72/107 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 7398 event pairs, 2 based on Foata normal form. 0/1005 useless extension candidates. Maximal degree in co-relation 755. Up to 32 conditions per place. [2023-08-30 18:14:23,128 INFO L82 GeneralOperation]: Start removeDead. Operand has 294 places, 327 transitions, 702 flow [2023-08-30 18:14:23,137 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 294 places, 327 transitions, 702 flow [2023-08-30 18:14:23,138 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:14:23,138 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 294 places, 327 transitions, 702 flow [2023-08-30 18:14:23,138 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 294 places, 327 transitions, 702 flow [2023-08-30 18:14:23,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 294 places, 327 transitions, 702 flow [2023-08-30 18:14:23,252 INFO L130 PetriNetUnfolder]: 191/1195 cut-off events. [2023-08-30 18:14:23,253 INFO L131 PetriNetUnfolder]: For 72/107 co-relation queries the response was YES. [2023-08-30 18:14:23,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1292 conditions, 1195 events. 191/1195 cut-off events. For 72/107 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 7398 event pairs, 2 based on Foata normal form. 0/1005 useless extension candidates. Maximal degree in co-relation 755. Up to 32 conditions per place. [2023-08-30 18:14:23,310 INFO L119 LiptonReduction]: Number of co-enabled transitions 53524 [2023-08-30 18:14:30,458 INFO L134 LiptonReduction]: Checked pairs total: 118052 [2023-08-30 18:14:30,458 INFO L136 LiptonReduction]: Total number of compositions: 247 [2023-08-30 18:14:30,460 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 18:14:30,460 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;@3e1503b6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:14:30,461 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-30 18:14:30,467 INFO L130 PetriNetUnfolder]: 12/85 cut-off events. [2023-08-30 18:14:30,467 INFO L131 PetriNetUnfolder]: For 5/6 co-relation queries the response was YES. [2023-08-30 18:14:30,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:14:30,468 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 18:14:30,468 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:14:30,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:14:30,468 INFO L85 PathProgramCache]: Analyzing trace with hash 628762806, now seen corresponding path program 1 times [2023-08-30 18:14:30,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:14:30,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541229341] [2023-08-30 18:14:30,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:14:30,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:14:30,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 18:14:30,485 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 18:14:30,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 18:14:30,502 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 18:14:30,502 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 18:14:30,502 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-30 18:14:30,502 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-30 18:14:30,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 18:14:30,503 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 18:14:30,503 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-30 18:14:30,503 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 18:14:30,503 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 18:14:30,552 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-08-30 18:14:30,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 396 places, 444 transitions, 966 flow [2023-08-30 18:14:31,182 INFO L130 PetriNetUnfolder]: 664/3318 cut-off events. [2023-08-30 18:14:31,182 INFO L131 PetriNetUnfolder]: For 419/494 co-relation queries the response was YES. [2023-08-30 18:14:31,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3769 conditions, 3318 events. 664/3318 cut-off events. For 419/494 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 25425 event pairs, 32 based on Foata normal form. 0/2817 useless extension candidates. Maximal degree in co-relation 2178. Up to 192 conditions per place. [2023-08-30 18:14:31,237 INFO L82 GeneralOperation]: Start removeDead. Operand has 396 places, 444 transitions, 966 flow [2023-08-30 18:14:31,267 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 395 places, 443 transitions, 958 flow [2023-08-30 18:14:31,267 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:14:31,267 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 395 places, 443 transitions, 958 flow [2023-08-30 18:14:31,268 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 395 places, 443 transitions, 958 flow [2023-08-30 18:14:31,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 395 places, 443 transitions, 958 flow [2023-08-30 18:14:31,738 INFO L130 PetriNetUnfolder]: 664/3317 cut-off events. [2023-08-30 18:14:31,738 INFO L131 PetriNetUnfolder]: For 416/484 co-relation queries the response was YES. [2023-08-30 18:14:31,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3765 conditions, 3317 events. 664/3317 cut-off events. For 416/484 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 25397 event pairs, 32 based on Foata normal form. 0/2816 useless extension candidates. Maximal degree in co-relation 2178. Up to 192 conditions per place. [2023-08-30 18:14:31,983 INFO L119 LiptonReduction]: Number of co-enabled transitions 120246 [2023-08-30 18:14:39,781 INFO L134 LiptonReduction]: Checked pairs total: 273516 [2023-08-30 18:14:39,782 INFO L136 LiptonReduction]: Total number of compositions: 331 [2023-08-30 18:14:39,783 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 18:14:39,783 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;@3e1503b6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:14:39,783 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 18:14:39,789 INFO L130 PetriNetUnfolder]: 11/81 cut-off events. [2023-08-30 18:14:39,789 INFO L131 PetriNetUnfolder]: For 7/8 co-relation queries the response was YES. [2023-08-30 18:14:39,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:14:39,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:14:39,789 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:14:39,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:14:39,790 INFO L85 PathProgramCache]: Analyzing trace with hash 599552984, now seen corresponding path program 1 times [2023-08-30 18:14:39,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:14:39,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379572024] [2023-08-30 18:14:39,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:14:39,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:14:39,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:14:39,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:14:39,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:14:39,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379572024] [2023-08-30 18:14:39,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379572024] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:14:39,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:14:39,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 18:14:39,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560629193] [2023-08-30 18:14:39,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:14:39,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:14:39,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:14:39,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:14:39,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 18:14:39,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 379 out of 775 [2023-08-30 18:14:39,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 160 transitions, 392 flow. Second operand has 3 states, 3 states have (on average 382.0) internal successors, (1146), 3 states have internal predecessors, (1146), 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) [2023-08-30 18:14:39,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:14:39,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 379 of 775 [2023-08-30 18:14:39,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand