./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_12-ptr_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_12-ptr_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 7cd6aaa75855c8ee03a174376352b142cf57dd56532b968b1b6c916585172927 --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 17:49:18,660 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 17:49:18,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 17:49:18,705 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 17:49:18,708 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 17:49:18,711 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 17:49:18,712 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 17:49:18,715 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 17:49:18,716 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 17:49:18,721 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 17:49:18,722 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 17:49:18,724 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 17:49:18,724 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 17:49:18,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 17:49:18,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 17:49:18,730 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 17:49:18,731 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 17:49:18,733 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 17:49:18,734 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 17:49:18,739 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 17:49:18,745 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 17:49:18,746 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 17:49:18,747 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 17:49:18,748 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 17:49:18,754 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 17:49:18,755 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 17:49:18,755 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 17:49:18,757 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 17:49:18,758 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 17:49:18,758 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 17:49:18,759 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 17:49:18,764 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 17:49:18,766 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 17:49:18,767 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 17:49:18,768 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 17:49:18,768 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 17:49:18,769 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 17:49:18,769 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 17:49:18,769 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 17:49:18,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 17:49:18,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 17:49:18,772 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 17:49:18,805 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 17:49:18,805 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 17:49:18,806 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 17:49:18,806 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 17:49:18,807 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 17:49:18,807 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 17:49:18,807 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 17:49:18,807 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 17:49:18,807 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 17:49:18,808 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 17:49:18,808 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 17:49:18,808 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 17:49:18,808 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 17:49:18,808 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 17:49:18,808 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 17:49:18,808 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 17:49:18,809 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 17:49:18,809 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 17:49:18,809 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 17:49:18,809 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 17:49:18,809 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 17:49:18,809 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 17:49:18,809 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 17:49:18,809 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 17:49:18,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 17:49:18,810 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 17:49:18,810 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 17:49:18,810 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 17:49:18,810 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 17:49:18,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 17:49:18,810 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 17:49:18,810 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 17:49:18,810 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 17:49:18,811 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 17:49:18,811 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 17:49:18,811 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7cd6aaa75855c8ee03a174376352b142cf57dd56532b968b1b6c916585172927 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 17:49:19,137 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 17:49:19,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 17:49:19,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 17:49:19,162 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 17:49:19,162 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 17:49:19,163 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_12-ptr_racefree.i [2023-08-30 17:49:20,404 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 17:49:20,687 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 17:49:20,688 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_12-ptr_racefree.i [2023-08-30 17:49:20,703 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/824d9649c/ac3a1312eadc42fa820187abcc3f58f9/FLAG2bb500ee2 [2023-08-30 17:49:20,721 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/824d9649c/ac3a1312eadc42fa820187abcc3f58f9 [2023-08-30 17:49:20,723 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 17:49:20,725 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 17:49:20,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 17:49:20,728 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 17:49:20,730 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 17:49:20,731 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:49:20" (1/1) ... [2023-08-30 17:49:20,732 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20056b40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:49:20, skipping insertion in model container [2023-08-30 17:49:20,732 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:49:20" (1/1) ... [2023-08-30 17:49:20,739 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 17:49:20,788 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 17:49:21,045 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_12-ptr_racefree.i[30176,30189] [2023-08-30 17:49:21,078 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 17:49:21,091 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 17:49:21,125 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_12-ptr_racefree.i[30176,30189] [2023-08-30 17:49:21,132 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 17:49:21,166 INFO L208 MainTranslator]: Completed translation [2023-08-30 17:49:21,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:49:21 WrapperNode [2023-08-30 17:49:21,167 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 17:49:21,168 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 17:49:21,168 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 17:49:21,168 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 17:49:21,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:49:21" (1/1) ... [2023-08-30 17:49:21,192 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:49:21" (1/1) ... [2023-08-30 17:49:21,215 INFO L138 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2023-08-30 17:49:21,215 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 17:49:21,217 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 17:49:21,217 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 17:49:21,217 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 17:49:21,228 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:49:21" (1/1) ... [2023-08-30 17:49:21,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:49:21" (1/1) ... [2023-08-30 17:49:21,231 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:49:21" (1/1) ... [2023-08-30 17:49:21,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:49:21" (1/1) ... [2023-08-30 17:49:21,237 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:49:21" (1/1) ... [2023-08-30 17:49:21,241 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:49:21" (1/1) ... [2023-08-30 17:49:21,242 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:49:21" (1/1) ... [2023-08-30 17:49:21,243 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:49:21" (1/1) ... [2023-08-30 17:49:21,246 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 17:49:21,253 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 17:49:21,254 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 17:49:21,254 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 17:49:21,255 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:49:21" (1/1) ... [2023-08-30 17:49:21,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 17:49:21,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:49:21,279 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 17:49:21,281 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 17:49:21,303 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 17:49:21,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 17:49:21,303 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 17:49:21,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 17:49:21,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 17:49:21,303 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 17:49:21,304 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 17:49:21,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 17:49:21,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 17:49:21,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 17:49:21,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 17:49:21,305 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 17:49:21,456 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 17:49:21,458 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 17:49:21,643 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 17:49:21,652 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 17:49:21,652 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-30 17:49:21,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:49:21 BoogieIcfgContainer [2023-08-30 17:49:21,654 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 17:49:21,656 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 17:49:21,660 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 17:49:21,663 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 17:49:21,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:49:20" (1/3) ... [2023-08-30 17:49:21,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47a749f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:49:21, skipping insertion in model container [2023-08-30 17:49:21,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:49:21" (2/3) ... [2023-08-30 17:49:21,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47a749f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:49:21, skipping insertion in model container [2023-08-30 17:49:21,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:49:21" (3/3) ... [2023-08-30 17:49:21,666 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_12-ptr_racefree.i [2023-08-30 17:49:21,674 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 17:49:21,683 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 17:49:21,683 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 17:49:21,683 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 17:49:21,776 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 17:49:21,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 117 transitions, 242 flow [2023-08-30 17:49:21,912 INFO L130 PetriNetUnfolder]: 17/152 cut-off events. [2023-08-30 17:49:21,912 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:49:21,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 152 events. 17/152 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 349 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 73. Up to 4 conditions per place. [2023-08-30 17:49:21,918 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 117 transitions, 242 flow [2023-08-30 17:49:21,923 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 112 transitions, 229 flow [2023-08-30 17:49:21,927 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:49:21,943 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 112 transitions, 229 flow [2023-08-30 17:49:21,949 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 112 transitions, 229 flow [2023-08-30 17:49:21,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 112 transitions, 229 flow [2023-08-30 17:49:21,998 INFO L130 PetriNetUnfolder]: 16/147 cut-off events. [2023-08-30 17:49:21,999 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:49:22,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 147 events. 16/147 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 333 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 73. Up to 4 conditions per place. [2023-08-30 17:49:22,004 INFO L119 LiptonReduction]: Number of co-enabled transitions 2706 [2023-08-30 17:49:24,965 INFO L134 LiptonReduction]: Checked pairs total: 4811 [2023-08-30 17:49:24,965 INFO L136 LiptonReduction]: Total number of compositions: 95 [2023-08-30 17:49:24,977 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:49:24,989 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;@10a73ba6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:49:24,990 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:49:24,995 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2023-08-30 17:49:24,995 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:49:24,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:49:25,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 17:49:25,001 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:49:25,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:49:25,006 INFO L85 PathProgramCache]: Analyzing trace with hash 13710433, now seen corresponding path program 1 times [2023-08-30 17:49:25,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:49:25,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013280082] [2023-08-30 17:49:25,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:49:25,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:49:25,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:49:25,221 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 17:49:25,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:49:25,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013280082] [2023-08-30 17:49:25,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013280082] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:49:25,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:49:25,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:49:25,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334086536] [2023-08-30 17:49:25,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:49:25,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:49:25,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:49:25,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:49:25,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:49:25,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 212 [2023-08-30 17:49:25,286 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 32 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 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 17:49:25,287 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:49:25,287 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 212 [2023-08-30 17:49:25,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:49:25,377 INFO L130 PetriNetUnfolder]: 80/188 cut-off events. [2023-08-30 17:49:25,378 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:49:25,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376 conditions, 188 events. 80/188 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 634 event pairs, 63 based on Foata normal form. 9/174 useless extension candidates. Maximal degree in co-relation 361. Up to 169 conditions per place. [2023-08-30 17:49:25,380 INFO L137 encePairwiseOnDemand]: 200/212 looper letters, 25 selfloop transitions, 2 changer transitions 6/34 dead transitions. [2023-08-30 17:49:25,380 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 34 transitions, 135 flow [2023-08-30 17:49:25,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:49:25,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:49:25,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 344 transitions. [2023-08-30 17:49:25,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5408805031446541 [2023-08-30 17:49:25,394 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 344 transitions. [2023-08-30 17:49:25,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 344 transitions. [2023-08-30 17:49:25,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:49:25,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 344 transitions. [2023-08-30 17:49:25,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 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 17:49:25,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 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 17:49:25,406 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 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 17:49:25,408 INFO L175 Difference]: Start difference. First operand has 27 places, 32 transitions, 69 flow. Second operand 3 states and 344 transitions. [2023-08-30 17:49:25,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 34 transitions, 135 flow [2023-08-30 17:49:25,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 34 transitions, 135 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:49:25,412 INFO L231 Difference]: Finished difference. Result has 29 places, 18 transitions, 47 flow [2023-08-30 17:49:25,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=29, PETRI_TRANSITIONS=18} [2023-08-30 17:49:25,416 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2023-08-30 17:49:25,417 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 18 transitions, 47 flow [2023-08-30 17:49:25,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 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 17:49:25,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:49:25,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:49:25,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 17:49:25,418 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:49:25,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:49:25,418 INFO L85 PathProgramCache]: Analyzing trace with hash 79779237, now seen corresponding path program 1 times [2023-08-30 17:49:25,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:49:25,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109512519] [2023-08-30 17:49:25,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:49:25,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:49:25,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:49:25,572 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 17:49:25,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:49:25,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109512519] [2023-08-30 17:49:25,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109512519] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:49:25,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760922471] [2023-08-30 17:49:25,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:49:25,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:49:25,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:49:25,577 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 17:49:25,584 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 17:49:25,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:49:25,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:49:25,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:49:25,758 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 17:49:25,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:49:25,778 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 17:49:25,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760922471] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:49:25,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:49:25,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:49:25,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077860235] [2023-08-30 17:49:25,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:49:25,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:49:25,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:49:25,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:49:25,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:49:25,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 212 [2023-08-30 17:49:25,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 18 transitions, 47 flow. Second operand has 7 states, 7 states have (on average 100.28571428571429) internal successors, (702), 7 states have internal predecessors, (702), 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 17:49:25,819 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:49:25,819 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 212 [2023-08-30 17:49:25,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:49:25,867 INFO L130 PetriNetUnfolder]: 20/56 cut-off events. [2023-08-30 17:49:25,868 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 17:49:25,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 56 events. 20/56 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 109 event pairs, 0 based on Foata normal form. 11/67 useless extension candidates. Maximal degree in co-relation 127. Up to 42 conditions per place. [2023-08-30 17:49:25,869 INFO L137 encePairwiseOnDemand]: 209/212 looper letters, 0 selfloop transitions, 0 changer transitions 26/26 dead transitions. [2023-08-30 17:49:25,869 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 26 transitions, 111 flow [2023-08-30 17:49:25,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 17:49:25,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 17:49:25,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 418 transitions. [2023-08-30 17:49:25,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49292452830188677 [2023-08-30 17:49:25,872 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 418 transitions. [2023-08-30 17:49:25,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 418 transitions. [2023-08-30 17:49:25,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:49:25,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 418 transitions. [2023-08-30 17:49:25,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 104.5) internal successors, (418), 4 states have internal predecessors, (418), 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 17:49:25,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 212.0) internal successors, (1060), 5 states have internal predecessors, (1060), 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 17:49:25,877 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 212.0) internal successors, (1060), 5 states have internal predecessors, (1060), 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 17:49:25,877 INFO L175 Difference]: Start difference. First operand has 29 places, 18 transitions, 47 flow. Second operand 4 states and 418 transitions. [2023-08-30 17:49:25,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 26 transitions, 111 flow [2023-08-30 17:49:25,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 26 transitions, 105 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 17:49:25,878 INFO L231 Difference]: Finished difference. Result has 21 places, 0 transitions, 0 flow [2023-08-30 17:49:25,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=33, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=21, PETRI_TRANSITIONS=0} [2023-08-30 17:49:25,879 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -6 predicate places. [2023-08-30 17:49:25,879 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 0 transitions, 0 flow [2023-08-30 17:49:25,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 100.28571428571429) internal successors, (702), 7 states have internal predecessors, (702), 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 17:49:25,884 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-30 17:49:25,893 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 17:49:26,090 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 17:49:26,091 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 17:49:26,093 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-30 17:49:26,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 117 transitions, 242 flow [2023-08-30 17:49:26,109 INFO L130 PetriNetUnfolder]: 17/152 cut-off events. [2023-08-30 17:49:26,109 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:49:26,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 152 events. 17/152 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 349 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 73. Up to 4 conditions per place. [2023-08-30 17:49:26,110 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 117 transitions, 242 flow [2023-08-30 17:49:26,111 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 112 transitions, 229 flow [2023-08-30 17:49:26,112 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:49:26,112 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 112 transitions, 229 flow [2023-08-30 17:49:26,112 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 112 transitions, 229 flow [2023-08-30 17:49:26,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 112 transitions, 229 flow [2023-08-30 17:49:26,123 INFO L130 PetriNetUnfolder]: 16/147 cut-off events. [2023-08-30 17:49:26,124 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:49:26,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 147 events. 16/147 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 333 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 73. Up to 4 conditions per place. [2023-08-30 17:49:26,126 INFO L119 LiptonReduction]: Number of co-enabled transitions 2706 [2023-08-30 17:49:28,666 INFO L134 LiptonReduction]: Checked pairs total: 4759 [2023-08-30 17:49:28,667 INFO L136 LiptonReduction]: Total number of compositions: 95 [2023-08-30 17:49:28,669 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:49:28,670 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;@10a73ba6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:49:28,670 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:49:28,673 INFO L130 PetriNetUnfolder]: 2/23 cut-off events. [2023-08-30 17:49:28,673 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:49:28,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:49:28,673 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 17:49:28,674 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:49:28,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:49:28,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1203083657, now seen corresponding path program 1 times [2023-08-30 17:49:28,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:49:28,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976620479] [2023-08-30 17:49:28,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:49:28,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:49:28,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:49:28,712 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:49:28,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:49:28,755 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:49:28,756 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:49:28,756 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:49:28,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 17:49:28,756 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:49:28,757 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:49:28,758 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:49:28,758 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 17:49:28,794 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 17:49:28,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 152 transitions, 322 flow [2023-08-30 17:49:28,829 INFO L130 PetriNetUnfolder]: 31/246 cut-off events. [2023-08-30 17:49:28,829 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:49:28,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 246 events. 31/246 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 717 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 154. Up to 8 conditions per place. [2023-08-30 17:49:28,831 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 152 transitions, 322 flow [2023-08-30 17:49:28,833 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 138 places, 152 transitions, 322 flow [2023-08-30 17:49:28,833 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:49:28,833 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 138 places, 152 transitions, 322 flow [2023-08-30 17:49:28,833 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 138 places, 152 transitions, 322 flow [2023-08-30 17:49:28,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 152 transitions, 322 flow [2023-08-30 17:49:28,854 INFO L130 PetriNetUnfolder]: 31/246 cut-off events. [2023-08-30 17:49:28,854 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:49:28,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 246 events. 31/246 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 717 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 154. Up to 8 conditions per place. [2023-08-30 17:49:28,861 INFO L119 LiptonReduction]: Number of co-enabled transitions 8316 [2023-08-30 17:49:31,450 INFO L134 LiptonReduction]: Checked pairs total: 16685 [2023-08-30 17:49:31,450 INFO L136 LiptonReduction]: Total number of compositions: 117 [2023-08-30 17:49:31,452 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:49:31,453 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;@10a73ba6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:49:31,453 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:49:31,455 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-30 17:49:31,455 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:49:31,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:49:31,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 17:49:31,456 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:49:31,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:49:31,456 INFO L85 PathProgramCache]: Analyzing trace with hash 25992817, now seen corresponding path program 1 times [2023-08-30 17:49:31,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:49:31,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355499513] [2023-08-30 17:49:31,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:49:31,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:49:31,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:49:31,518 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 17:49:31,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:49:31,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355499513] [2023-08-30 17:49:31,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355499513] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:49:31,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:49:31,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:49:31,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408580638] [2023-08-30 17:49:31,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:49:31,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:49:31,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:49:31,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:49:31,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:49:31,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 269 [2023-08-30 17:49:31,531 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 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 17:49:31,532 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:49:31,532 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 269 [2023-08-30 17:49:31,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:49:31,824 INFO L130 PetriNetUnfolder]: 1642/2949 cut-off events. [2023-08-30 17:49:31,825 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:49:31,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5703 conditions, 2949 events. 1642/2949 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 17525 event pairs, 752 based on Foata normal form. 428/3078 useless extension candidates. Maximal degree in co-relation 589. Up to 2673 conditions per place. [2023-08-30 17:49:31,851 INFO L137 encePairwiseOnDemand]: 252/269 looper letters, 32 selfloop transitions, 2 changer transitions 10/51 dead transitions. [2023-08-30 17:49:31,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 51 transitions, 204 flow [2023-08-30 17:49:31,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:49:31,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:49:31,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 441 transitions. [2023-08-30 17:49:31,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5464684014869888 [2023-08-30 17:49:31,855 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 441 transitions. [2023-08-30 17:49:31,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 441 transitions. [2023-08-30 17:49:31,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:49:31,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 441 transitions. [2023-08-30 17:49:31,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 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 17:49:31,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 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 17:49:31,860 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 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 17:49:31,861 INFO L175 Difference]: Start difference. First operand has 44 places, 55 transitions, 128 flow. Second operand 3 states and 441 transitions. [2023-08-30 17:49:31,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 51 transitions, 204 flow [2023-08-30 17:49:31,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 204 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:49:31,863 INFO L231 Difference]: Finished difference. Result has 47 places, 32 transitions, 82 flow [2023-08-30 17:49:31,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=47, PETRI_TRANSITIONS=32} [2023-08-30 17:49:31,864 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-30 17:49:31,864 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 32 transitions, 82 flow [2023-08-30 17:49:31,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 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 17:49:31,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:49:31,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:49:31,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 17:49:31,865 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:49:31,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:49:31,866 INFO L85 PathProgramCache]: Analyzing trace with hash -643138890, now seen corresponding path program 1 times [2023-08-30 17:49:31,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:49:31,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163301433] [2023-08-30 17:49:31,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:49:31,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:49:31,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:49:31,908 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 17:49:31,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:49:31,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163301433] [2023-08-30 17:49:31,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163301433] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:49:31,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639510581] [2023-08-30 17:49:31,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:49:31,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:49:31,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:49:31,911 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 17:49:31,965 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 17:49:32,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:49:32,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:49:32,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:49:32,038 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 17:49:32,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:49:32,060 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 17:49:32,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639510581] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:49:32,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:49:32,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:49:32,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500088846] [2023-08-30 17:49:32,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:49:32,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:49:32,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:49:32,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:49:32,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:49:32,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 269 [2023-08-30 17:49:32,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 32 transitions, 82 flow. Second operand has 7 states, 7 states have (on average 127.28571428571429) internal successors, (891), 7 states have internal predecessors, (891), 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 17:49:32,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:49:32,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 269 [2023-08-30 17:49:32,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:49:32,202 INFO L130 PetriNetUnfolder]: 376/688 cut-off events. [2023-08-30 17:49:32,203 INFO L131 PetriNetUnfolder]: For 99/99 co-relation queries the response was YES. [2023-08-30 17:49:32,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1471 conditions, 688 events. 376/688 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 3188 event pairs, 0 based on Foata normal form. 90/777 useless extension candidates. Maximal degree in co-relation 163. Up to 450 conditions per place. [2023-08-30 17:49:32,205 INFO L137 encePairwiseOnDemand]: 266/269 looper letters, 0 selfloop transitions, 0 changer transitions 55/55 dead transitions. [2023-08-30 17:49:32,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 55 transitions, 222 flow [2023-08-30 17:49:32,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 17:49:32,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 17:49:32,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 675 transitions. [2023-08-30 17:49:32,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5018587360594795 [2023-08-30 17:49:32,207 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 675 transitions. [2023-08-30 17:49:32,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 675 transitions. [2023-08-30 17:49:32,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:49:32,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 675 transitions. [2023-08-30 17:49:32,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 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 17:49:32,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 269.0) internal successors, (1614), 6 states have internal predecessors, (1614), 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 17:49:32,213 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 269.0) internal successors, (1614), 6 states have internal predecessors, (1614), 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 17:49:32,213 INFO L175 Difference]: Start difference. First operand has 47 places, 32 transitions, 82 flow. Second operand 5 states and 675 transitions. [2023-08-30 17:49:32,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 55 transitions, 222 flow [2023-08-30 17:49:32,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 55 transitions, 220 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 17:49:32,215 INFO L231 Difference]: Finished difference. Result has 39 places, 0 transitions, 0 flow [2023-08-30 17:49:32,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=39, PETRI_TRANSITIONS=0} [2023-08-30 17:49:32,219 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -5 predicate places. [2023-08-30 17:49:32,219 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 0 transitions, 0 flow [2023-08-30 17:49:32,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 127.28571428571429) internal successors, (891), 7 states have internal predecessors, (891), 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 17:49:32,220 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-30 17:49:32,232 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 17:49:32,425 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 17:49:32,426 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 17:49:32,426 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-30 17:49:32,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 152 transitions, 322 flow [2023-08-30 17:49:32,456 INFO L130 PetriNetUnfolder]: 31/246 cut-off events. [2023-08-30 17:49:32,456 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:49:32,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 246 events. 31/246 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 717 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 154. Up to 8 conditions per place. [2023-08-30 17:49:32,458 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 152 transitions, 322 flow [2023-08-30 17:49:32,459 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 138 places, 152 transitions, 322 flow [2023-08-30 17:49:32,459 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:49:32,459 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 138 places, 152 transitions, 322 flow [2023-08-30 17:49:32,460 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 138 places, 152 transitions, 322 flow [2023-08-30 17:49:32,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 152 transitions, 322 flow [2023-08-30 17:49:32,481 INFO L130 PetriNetUnfolder]: 31/246 cut-off events. [2023-08-30 17:49:32,482 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:49:32,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 246 events. 31/246 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 717 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 154. Up to 8 conditions per place. [2023-08-30 17:49:32,488 INFO L119 LiptonReduction]: Number of co-enabled transitions 8316 [2023-08-30 17:49:35,203 INFO L134 LiptonReduction]: Checked pairs total: 18331 [2023-08-30 17:49:35,203 INFO L136 LiptonReduction]: Total number of compositions: 117 [2023-08-30 17:49:35,205 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:49:35,206 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;@10a73ba6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:49:35,206 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:49:35,210 INFO L130 PetriNetUnfolder]: 10/54 cut-off events. [2023-08-30 17:49:35,210 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 17:49:35,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:49:35,211 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 17:49:35,211 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:49:35,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:49:35,212 INFO L85 PathProgramCache]: Analyzing trace with hash 174623039, now seen corresponding path program 1 times [2023-08-30 17:49:35,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:49:35,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788325569] [2023-08-30 17:49:35,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:49:35,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:49:35,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:49:35,236 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:49:35,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:49:35,258 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:49:35,258 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:49:35,258 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:49:35,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 17:49:35,259 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:49:35,259 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:49:35,259 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:49:35,260 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 17:49:35,278 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 17:49:35,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 187 transitions, 404 flow [2023-08-30 17:49:35,310 INFO L130 PetriNetUnfolder]: 50/371 cut-off events. [2023-08-30 17:49:35,311 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:49:35,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 399 conditions, 371 events. 50/371 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1228 event pairs, 1 based on Foata normal form. 0/313 useless extension candidates. Maximal degree in co-relation 254. Up to 16 conditions per place. [2023-08-30 17:49:35,314 INFO L82 GeneralOperation]: Start removeDead. Operand has 168 places, 187 transitions, 404 flow [2023-08-30 17:49:35,316 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 168 places, 187 transitions, 404 flow [2023-08-30 17:49:35,316 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:49:35,316 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 168 places, 187 transitions, 404 flow [2023-08-30 17:49:35,317 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 168 places, 187 transitions, 404 flow [2023-08-30 17:49:35,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 187 transitions, 404 flow [2023-08-30 17:49:35,360 INFO L130 PetriNetUnfolder]: 50/371 cut-off events. [2023-08-30 17:49:35,360 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:49:35,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 399 conditions, 371 events. 50/371 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1228 event pairs, 1 based on Foata normal form. 0/313 useless extension candidates. Maximal degree in co-relation 254. Up to 16 conditions per place. [2023-08-30 17:49:35,373 INFO L119 LiptonReduction]: Number of co-enabled transitions 16038 [2023-08-30 17:49:38,189 INFO L134 LiptonReduction]: Checked pairs total: 34965 [2023-08-30 17:49:38,190 INFO L136 LiptonReduction]: Total number of compositions: 137 [2023-08-30 17:49:38,191 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:49:38,192 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;@10a73ba6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:49:38,192 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:49:38,193 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-30 17:49:38,194 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:49:38,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:49:38,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 17:49:38,194 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:49:38,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:49:38,194 INFO L85 PathProgramCache]: Analyzing trace with hash 40643584, now seen corresponding path program 1 times [2023-08-30 17:49:38,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:49:38,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507620562] [2023-08-30 17:49:38,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:49:38,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:49:38,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:49:38,255 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 17:49:38,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:49:38,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507620562] [2023-08-30 17:49:38,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507620562] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:49:38,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:49:38,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:49:38,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693780240] [2023-08-30 17:49:38,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:49:38,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:49:38,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:49:38,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:49:38,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:49:38,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 324 [2023-08-30 17:49:38,270 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 74 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 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 17:49:38,270 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:49:38,270 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 324 [2023-08-30 17:49:38,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:49:42,094 INFO L130 PetriNetUnfolder]: 32280/46590 cut-off events. [2023-08-30 17:49:42,094 INFO L131 PetriNetUnfolder]: For 1317/1317 co-relation queries the response was YES. [2023-08-30 17:49:42,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92819 conditions, 46590 events. 32280/46590 cut-off events. For 1317/1317 co-relation queries the response was YES. Maximal size of possible extension queue 1077. Compared 303111 event pairs, 21006 based on Foata normal form. 5103/47960 useless extension candidates. Maximal degree in co-relation 7949. Up to 45346 conditions per place. [2023-08-30 17:49:42,297 INFO L137 encePairwiseOnDemand]: 301/324 looper letters, 44 selfloop transitions, 2 changer transitions 11/64 dead transitions. [2023-08-30 17:49:42,297 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 64 transitions, 268 flow [2023-08-30 17:49:42,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:49:42,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:49:42,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 541 transitions. [2023-08-30 17:49:42,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565843621399177 [2023-08-30 17:49:42,300 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 541 transitions. [2023-08-30 17:49:42,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 541 transitions. [2023-08-30 17:49:42,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:49:42,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 541 transitions. [2023-08-30 17:49:42,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 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 17:49:42,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 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 17:49:42,305 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 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 17:49:42,305 INFO L175 Difference]: Start difference. First operand has 58 places, 74 transitions, 178 flow. Second operand 3 states and 541 transitions. [2023-08-30 17:49:42,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 64 transitions, 268 flow [2023-08-30 17:49:42,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 64 transitions, 268 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:49:42,311 INFO L231 Difference]: Finished difference. Result has 61 places, 44 transitions, 113 flow [2023-08-30 17:49:42,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=61, PETRI_TRANSITIONS=44} [2023-08-30 17:49:42,313 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-08-30 17:49:42,313 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 44 transitions, 113 flow [2023-08-30 17:49:42,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 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 17:49:42,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:49:42,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:49:42,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 17:49:42,314 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:49:42,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:49:42,315 INFO L85 PathProgramCache]: Analyzing trace with hash 291879047, now seen corresponding path program 1 times [2023-08-30 17:49:42,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:49:42,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234861651] [2023-08-30 17:49:42,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:49:42,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:49:42,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:49:42,376 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 17:49:42,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:49:42,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234861651] [2023-08-30 17:49:42,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234861651] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:49:42,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449296234] [2023-08-30 17:49:42,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:49:42,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:49:42,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:49:42,378 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 17:49:42,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 17:49:42,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:49:42,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:49:42,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:49:42,467 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 17:49:42,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:49:42,485 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 17:49:42,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449296234] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:49:42,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:49:42,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:49:42,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36797008] [2023-08-30 17:49:42,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:49:42,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:49:42,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:49:42,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:49:42,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:49:42,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 324 [2023-08-30 17:49:42,512 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 44 transitions, 113 flow. Second operand has 7 states, 7 states have (on average 154.28571428571428) internal successors, (1080), 7 states have internal predecessors, (1080), 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 17:49:42,512 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:49:42,512 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 324 [2023-08-30 17:49:42,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:49:43,245 INFO L130 PetriNetUnfolder]: 7582/11197 cut-off events. [2023-08-30 17:49:43,245 INFO L131 PetriNetUnfolder]: For 1404/1404 co-relation queries the response was YES. [2023-08-30 17:49:43,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23615 conditions, 11197 events. 7582/11197 cut-off events. For 1404/1404 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 65263 event pairs, 0 based on Foata normal form. 1098/12294 useless extension candidates. Maximal degree in co-relation 2698. Up to 7322 conditions per place. [2023-08-30 17:49:43,265 INFO L137 encePairwiseOnDemand]: 321/324 looper letters, 0 selfloop transitions, 0 changer transitions 98/98 dead transitions. [2023-08-30 17:49:43,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 98 transitions, 403 flow [2023-08-30 17:49:43,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 17:49:43,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 17:49:43,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1006 transitions. [2023-08-30 17:49:43,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5174897119341564 [2023-08-30 17:49:43,268 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1006 transitions. [2023-08-30 17:49:43,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1006 transitions. [2023-08-30 17:49:43,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:49:43,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1006 transitions. [2023-08-30 17:49:43,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 167.66666666666666) internal successors, (1006), 6 states have internal predecessors, (1006), 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 17:49:43,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 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 17:49:43,275 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 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 17:49:43,275 INFO L175 Difference]: Start difference. First operand has 61 places, 44 transitions, 113 flow. Second operand 6 states and 1006 transitions. [2023-08-30 17:49:43,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 98 transitions, 403 flow [2023-08-30 17:49:43,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 98 transitions, 399 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 17:49:43,277 INFO L231 Difference]: Finished difference. Result has 54 places, 0 transitions, 0 flow [2023-08-30 17:49:43,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=54, PETRI_TRANSITIONS=0} [2023-08-30 17:49:43,278 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -4 predicate places. [2023-08-30 17:49:43,278 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 0 transitions, 0 flow [2023-08-30 17:49:43,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 154.28571428571428) internal successors, (1080), 7 states have internal predecessors, (1080), 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 17:49:43,279 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-30 17:49:43,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-30 17:49:43,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:49:43,484 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 17:49:43,484 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-30 17:49:43,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 187 transitions, 404 flow [2023-08-30 17:49:43,523 INFO L130 PetriNetUnfolder]: 50/371 cut-off events. [2023-08-30 17:49:43,523 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:49:43,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 399 conditions, 371 events. 50/371 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1228 event pairs, 1 based on Foata normal form. 0/313 useless extension candidates. Maximal degree in co-relation 254. Up to 16 conditions per place. [2023-08-30 17:49:43,526 INFO L82 GeneralOperation]: Start removeDead. Operand has 168 places, 187 transitions, 404 flow [2023-08-30 17:49:43,527 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 168 places, 187 transitions, 404 flow [2023-08-30 17:49:43,527 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:49:43,528 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 168 places, 187 transitions, 404 flow [2023-08-30 17:49:43,528 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 168 places, 187 transitions, 404 flow [2023-08-30 17:49:43,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 187 transitions, 404 flow [2023-08-30 17:49:43,557 INFO L130 PetriNetUnfolder]: 50/371 cut-off events. [2023-08-30 17:49:43,557 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 17:49:43,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 399 conditions, 371 events. 50/371 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1228 event pairs, 1 based on Foata normal form. 0/313 useless extension candidates. Maximal degree in co-relation 254. Up to 16 conditions per place. [2023-08-30 17:49:43,566 INFO L119 LiptonReduction]: Number of co-enabled transitions 16038 [2023-08-30 17:49:46,484 INFO L134 LiptonReduction]: Checked pairs total: 38583 [2023-08-30 17:49:46,485 INFO L136 LiptonReduction]: Total number of compositions: 137 [2023-08-30 17:49:46,486 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:49:46,486 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;@10a73ba6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:49:46,486 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:49:46,491 INFO L130 PetriNetUnfolder]: 19/91 cut-off events. [2023-08-30 17:49:46,491 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 17:49:46,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:49:46,492 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 17:49:46,492 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:49:46,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:49:46,492 INFO L85 PathProgramCache]: Analyzing trace with hash -617834522, now seen corresponding path program 1 times [2023-08-30 17:49:46,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:49:46,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18300129] [2023-08-30 17:49:46,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:49:46,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:49:46,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:49:46,521 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:49:46,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:49:46,534 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:49:46,534 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:49:46,534 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:49:46,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 17:49:46,535 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:49:46,535 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:49:46,535 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:49:46,535 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 17:49:46,555 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 17:49:46,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 222 transitions, 488 flow [2023-08-30 17:49:46,612 INFO L130 PetriNetUnfolder]: 81/560 cut-off events. [2023-08-30 17:49:46,613 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:49:46,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 615 conditions, 560 events. 81/560 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2118 event pairs, 6 based on Foata normal form. 0/474 useless extension candidates. Maximal degree in co-relation 391. Up to 32 conditions per place. [2023-08-30 17:49:46,619 INFO L82 GeneralOperation]: Start removeDead. Operand has 198 places, 222 transitions, 488 flow [2023-08-30 17:49:46,623 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 198 places, 222 transitions, 488 flow [2023-08-30 17:49:46,623 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:49:46,623 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 198 places, 222 transitions, 488 flow [2023-08-30 17:49:46,623 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 198 places, 222 transitions, 488 flow [2023-08-30 17:49:46,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 222 transitions, 488 flow [2023-08-30 17:49:46,678 INFO L130 PetriNetUnfolder]: 81/560 cut-off events. [2023-08-30 17:49:46,678 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:49:46,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 615 conditions, 560 events. 81/560 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2118 event pairs, 6 based on Foata normal form. 0/474 useless extension candidates. Maximal degree in co-relation 391. Up to 32 conditions per place. [2023-08-30 17:49:46,698 INFO L119 LiptonReduction]: Number of co-enabled transitions 26136 [2023-08-30 17:49:49,690 INFO L134 LiptonReduction]: Checked pairs total: 66328 [2023-08-30 17:49:49,690 INFO L136 LiptonReduction]: Total number of compositions: 159 [2023-08-30 17:49:49,691 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:49:49,692 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;@10a73ba6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:49:49,692 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:49:49,693 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-08-30 17:49:49,693 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:49:49,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:49:49,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 17:49:49,693 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:49:49,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:49:49,694 INFO L85 PathProgramCache]: Analyzing trace with hash 57667694, now seen corresponding path program 1 times [2023-08-30 17:49:49,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:49:49,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039328972] [2023-08-30 17:49:49,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:49:49,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:49:49,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:49:49,734 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 17:49:49,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:49:49,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039328972] [2023-08-30 17:49:49,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039328972] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:49:49,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:49:49,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:49:49,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470330649] [2023-08-30 17:49:49,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:49:49,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:49:49,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:49:49,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:49:49,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:49:49,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 381 [2023-08-30 17:49:49,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 93 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 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 17:49:49,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:49:49,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 381 [2023-08-30 17:49:49,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:50:26,679 INFO L130 PetriNetUnfolder]: 411276/560855 cut-off events. [2023-08-30 17:50:26,679 INFO L131 PetriNetUnfolder]: For 20805/20805 co-relation queries the response was YES. [2023-08-30 17:50:27,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1107559 conditions, 560855 events. 411276/560855 cut-off events. For 20805/20805 co-relation queries the response was YES. Maximal size of possible extension queue 10500. Compared 4246023 event pairs, 397881 based on Foata normal form. 85320/609167 useless extension candidates. Maximal degree in co-relation 94004. Up to 535317 conditions per place. [2023-08-30 17:50:28,917 INFO L137 encePairwiseOnDemand]: 352/381 looper letters, 54 selfloop transitions, 2 changer transitions 12/78 dead transitions. [2023-08-30 17:50:28,918 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 78 transitions, 332 flow [2023-08-30 17:50:28,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:50:28,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:50:28,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 639 transitions. [2023-08-30 17:50:28,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5590551181102362 [2023-08-30 17:50:28,920 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 639 transitions. [2023-08-30 17:50:28,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 639 transitions. [2023-08-30 17:50:28,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:50:28,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 639 transitions. [2023-08-30 17:50:28,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 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 17:50:28,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 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 17:50:28,924 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 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 17:50:28,925 INFO L175 Difference]: Start difference. First operand has 72 places, 93 transitions, 230 flow. Second operand 3 states and 639 transitions. [2023-08-30 17:50:28,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 78 transitions, 332 flow [2023-08-30 17:50:28,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 78 transitions, 332 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:50:28,934 INFO L231 Difference]: Finished difference. Result has 75 places, 56 transitions, 146 flow [2023-08-30 17:50:28,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=75, PETRI_TRANSITIONS=56} [2023-08-30 17:50:28,935 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2023-08-30 17:50:28,935 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 56 transitions, 146 flow [2023-08-30 17:50:28,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 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 17:50:28,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:50:28,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:50:28,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 17:50:28,936 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:50:28,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:50:28,936 INFO L85 PathProgramCache]: Analyzing trace with hash -320991985, now seen corresponding path program 1 times [2023-08-30 17:50:28,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:50:28,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164269949] [2023-08-30 17:50:28,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:50:28,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:50:28,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:50:28,973 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 17:50:28,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:50:28,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164269949] [2023-08-30 17:50:28,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164269949] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:50:28,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586292860] [2023-08-30 17:50:28,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:50:28,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:50:28,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:50:28,976 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 17:50:28,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 17:50:29,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:50:29,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:50:29,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:50:29,084 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 17:50:29,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:50:29,101 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 17:50:29,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586292860] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:50:29,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:50:29,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:50:29,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999421691] [2023-08-30 17:50:29,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:50:29,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:50:29,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:50:29,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:50:29,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:50:29,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 381 [2023-08-30 17:50:29,122 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 56 transitions, 146 flow. Second operand has 7 states, 7 states have (on average 181.28571428571428) internal successors, (1269), 7 states have internal predecessors, (1269), 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 17:50:29,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:50:29,122 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 381 [2023-08-30 17:50:29,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:50:43,323 INFO L130 PetriNetUnfolder]: 191482/255667 cut-off events. [2023-08-30 17:50:43,323 INFO L131 PetriNetUnfolder]: For 16300/16300 co-relation queries the response was YES. [2023-08-30 17:50:43,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528312 conditions, 255667 events. 191482/255667 cut-off events. For 16300/16300 co-relation queries the response was YES. Maximal size of possible extension queue 5403. Compared 1771844 event pairs, 7920 based on Foata normal form. 1110/256776 useless extension candidates. Maximal degree in co-relation 53961. Up to 163477 conditions per place. [2023-08-30 17:50:44,453 INFO L137 encePairwiseOnDemand]: 377/381 looper letters, 136 selfloop transitions, 5 changer transitions 1/152 dead transitions. [2023-08-30 17:50:44,453 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 152 transitions, 626 flow [2023-08-30 17:50:44,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 17:50:44,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 17:50:44,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1219 transitions. [2023-08-30 17:50:44,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5332458442694663 [2023-08-30 17:50:44,456 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1219 transitions. [2023-08-30 17:50:44,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1219 transitions. [2023-08-30 17:50:44,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:50:44,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1219 transitions. [2023-08-30 17:50:44,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 203.16666666666666) internal successors, (1219), 6 states have internal predecessors, (1219), 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 17:50:44,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 381.0) internal successors, (2667), 7 states have internal predecessors, (2667), 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 17:50:44,463 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 381.0) internal successors, (2667), 7 states have internal predecessors, (2667), 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 17:50:44,463 INFO L175 Difference]: Start difference. First operand has 75 places, 56 transitions, 146 flow. Second operand 6 states and 1219 transitions. [2023-08-30 17:50:44,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 152 transitions, 626 flow [2023-08-30 17:50:44,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 152 transitions, 618 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 17:50:44,472 INFO L231 Difference]: Finished difference. Result has 75 places, 58 transitions, 172 flow [2023-08-30 17:50:44,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=172, PETRI_PLACES=75, PETRI_TRANSITIONS=58} [2023-08-30 17:50:44,472 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2023-08-30 17:50:44,472 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 58 transitions, 172 flow [2023-08-30 17:50:44,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 181.28571428571428) internal successors, (1269), 7 states have internal predecessors, (1269), 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 17:50:44,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:50:44,473 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:50:44,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 17:50:44,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:50:44,685 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:50:44,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:50:44,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1301199444, now seen corresponding path program 1 times [2023-08-30 17:50:44,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:50:44,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496057936] [2023-08-30 17:50:44,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:50:44,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:50:44,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:50:44,770 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:50:44,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:50:44,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496057936] [2023-08-30 17:50:44,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496057936] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:50:44,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567402990] [2023-08-30 17:50:44,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:50:44,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:50:44,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:50:44,772 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 17:50:44,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 17:50:44,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:50:44,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 17:50:44,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:50:44,879 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:50:44,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:50:44,938 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:50:44,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567402990] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:50:44,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:50:44,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 17:50:44,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952357483] [2023-08-30 17:50:44,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:50:44,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 17:50:44,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:50:44,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 17:50:44,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 17:50:44,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 381 [2023-08-30 17:50:44,975 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 58 transitions, 172 flow. Second operand has 13 states, 13 states have (on average 181.6153846153846) internal successors, (2361), 13 states have internal predecessors, (2361), 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 17:50:44,975 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:50:44,975 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 381 [2023-08-30 17:50:44,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:50:50,383 INFO L130 PetriNetUnfolder]: 63646/89221 cut-off events. [2023-08-30 17:50:50,383 INFO L131 PetriNetUnfolder]: For 70140/70140 co-relation queries the response was YES. [2023-08-30 17:50:50,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208526 conditions, 89221 events. 63646/89221 cut-off events. For 70140/70140 co-relation queries the response was YES. Maximal size of possible extension queue 2076. Compared 602332 event pairs, 0 based on Foata normal form. 8910/98130 useless extension candidates. Maximal degree in co-relation 27219. Up to 40869 conditions per place. [2023-08-30 17:50:50,638 INFO L137 encePairwiseOnDemand]: 378/381 looper letters, 0 selfloop transitions, 0 changer transitions 148/148 dead transitions. [2023-08-30 17:50:50,638 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 148 transitions, 626 flow [2023-08-30 17:50:50,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 17:50:50,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 17:50:50,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1392 transitions. [2023-08-30 17:50:50,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5219347581552306 [2023-08-30 17:50:50,642 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1392 transitions. [2023-08-30 17:50:50,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1392 transitions. [2023-08-30 17:50:50,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:50:50,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1392 transitions. [2023-08-30 17:50:50,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 198.85714285714286) internal successors, (1392), 7 states have internal predecessors, (1392), 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 17:50:50,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 381.0) internal successors, (3048), 8 states have internal predecessors, (3048), 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 17:50:50,649 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 381.0) internal successors, (3048), 8 states have internal predecessors, (3048), 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 17:50:50,649 INFO L175 Difference]: Start difference. First operand has 75 places, 58 transitions, 172 flow. Second operand 7 states and 1392 transitions. [2023-08-30 17:50:50,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 148 transitions, 626 flow [2023-08-30 17:50:50,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 148 transitions, 607 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-08-30 17:50:50,838 INFO L231 Difference]: Finished difference. Result has 71 places, 0 transitions, 0 flow [2023-08-30 17:50:50,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=71, PETRI_TRANSITIONS=0} [2023-08-30 17:50:50,839 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -1 predicate places. [2023-08-30 17:50:50,839 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 0 transitions, 0 flow [2023-08-30 17:50:50,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 181.6153846153846) internal successors, (2361), 13 states have internal predecessors, (2361), 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 17:50:50,841 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-30 17:50:50,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 17:50:51,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-30 17:50:51,046 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 17:50:51,046 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-30 17:50:51,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 222 transitions, 488 flow [2023-08-30 17:50:51,081 INFO L130 PetriNetUnfolder]: 81/560 cut-off events. [2023-08-30 17:50:51,081 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:50:51,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 615 conditions, 560 events. 81/560 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2118 event pairs, 6 based on Foata normal form. 0/474 useless extension candidates. Maximal degree in co-relation 391. Up to 32 conditions per place. [2023-08-30 17:50:51,085 INFO L82 GeneralOperation]: Start removeDead. Operand has 198 places, 222 transitions, 488 flow [2023-08-30 17:50:51,087 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 198 places, 222 transitions, 488 flow [2023-08-30 17:50:51,087 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:50:51,087 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 198 places, 222 transitions, 488 flow [2023-08-30 17:50:51,088 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 198 places, 222 transitions, 488 flow [2023-08-30 17:50:51,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 222 transitions, 488 flow [2023-08-30 17:50:51,121 INFO L130 PetriNetUnfolder]: 81/560 cut-off events. [2023-08-30 17:50:51,121 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 17:50:51,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 615 conditions, 560 events. 81/560 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2118 event pairs, 6 based on Foata normal form. 0/474 useless extension candidates. Maximal degree in co-relation 391. Up to 32 conditions per place. [2023-08-30 17:50:51,136 INFO L119 LiptonReduction]: Number of co-enabled transitions 26136 [2023-08-30 17:50:54,034 INFO L134 LiptonReduction]: Checked pairs total: 66132 [2023-08-30 17:50:54,034 INFO L136 LiptonReduction]: Total number of compositions: 158 [2023-08-30 17:50:54,035 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:50:54,037 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;@10a73ba6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:50:54,037 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:50:54,043 INFO L130 PetriNetUnfolder]: 29/130 cut-off events. [2023-08-30 17:50:54,043 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-30 17:50:54,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:50:54,043 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 17:50:54,043 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:50:54,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:50:54,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1883842841, now seen corresponding path program 1 times [2023-08-30 17:50:54,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:50:54,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087765522] [2023-08-30 17:50:54,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:50:54,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:50:54,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:50:54,065 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:50:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:50:54,080 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:50:54,080 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:50:54,081 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:50:54,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 17:50:54,081 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 17:50:54,081 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:50:54,081 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:50:54,081 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-30 17:50:54,119 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-30 17:50:54,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 228 places, 257 transitions, 574 flow [2023-08-30 17:50:54,369 INFO L130 PetriNetUnfolder]: 140/881 cut-off events. [2023-08-30 17:50:54,369 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 17:50:54,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 992 conditions, 881 events. 140/881 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3972 event pairs, 23 based on Foata normal form. 0/751 useless extension candidates. Maximal degree in co-relation 605. Up to 80 conditions per place. [2023-08-30 17:50:54,377 INFO L82 GeneralOperation]: Start removeDead. Operand has 228 places, 257 transitions, 574 flow [2023-08-30 17:50:54,381 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 228 places, 257 transitions, 574 flow [2023-08-30 17:50:54,381 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:50:54,381 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 228 places, 257 transitions, 574 flow [2023-08-30 17:50:54,381 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 228 places, 257 transitions, 574 flow [2023-08-30 17:50:54,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 228 places, 257 transitions, 574 flow [2023-08-30 17:50:54,453 INFO L130 PetriNetUnfolder]: 140/881 cut-off events. [2023-08-30 17:50:54,453 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 17:50:54,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 992 conditions, 881 events. 140/881 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3972 event pairs, 23 based on Foata normal form. 0/751 useless extension candidates. Maximal degree in co-relation 605. Up to 80 conditions per place. [2023-08-30 17:50:54,488 INFO L119 LiptonReduction]: Number of co-enabled transitions 38610 [2023-08-30 17:50:57,256 INFO L134 LiptonReduction]: Checked pairs total: 102120 [2023-08-30 17:50:57,256 INFO L136 LiptonReduction]: Total number of compositions: 179 [2023-08-30 17:50:57,257 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:50:57,258 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;@10a73ba6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:50:57,258 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:50:57,259 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2023-08-30 17:50:57,259 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:50:57,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:50:57,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 17:50:57,260 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 17:50:57,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:50:57,260 INFO L85 PathProgramCache]: Analyzing trace with hash 77028284, now seen corresponding path program 1 times [2023-08-30 17:50:57,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:50:57,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989602301] [2023-08-30 17:50:57,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:50:57,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:50:57,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:50:57,291 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 17:50:57,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:50:57,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989602301] [2023-08-30 17:50:57,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989602301] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:50:57,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:50:57,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:50:57,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218194376] [2023-08-30 17:50:57,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:50:57,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:50:57,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:50:57,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:50:57,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:50:57,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 436 [2023-08-30 17:50:57,302 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 112 transitions, 284 flow. Second operand has 3 states, 3 states have (on average 208.33333333333334) internal successors, (625), 3 states have internal predecessors, (625), 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 17:50:57,302 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:50:57,302 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 436 [2023-08-30 17:50:57,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand