./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/parallel-misc-2.wvr.c --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/weaver/parallel-misc-2.wvr.c -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 c245694d80bb36f575f27eb50fa261b26ec38a4ced597397981ad6c6c7486707 --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 19:39:15,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 19:39:15,791 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 19:39:15,833 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 19:39:15,841 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 19:39:15,844 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 19:39:15,846 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 19:39:15,848 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 19:39:15,850 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 19:39:15,854 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 19:39:15,855 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 19:39:15,856 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 19:39:15,857 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 19:39:15,857 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 19:39:15,858 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 19:39:15,861 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 19:39:15,862 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 19:39:15,863 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 19:39:15,866 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 19:39:15,869 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 19:39:15,870 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 19:39:15,872 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 19:39:15,873 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 19:39:15,873 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 19:39:15,881 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 19:39:15,881 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 19:39:15,881 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 19:39:15,882 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 19:39:15,883 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 19:39:15,883 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 19:39:15,884 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 19:39:15,884 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 19:39:15,885 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 19:39:15,885 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 19:39:15,886 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 19:39:15,886 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 19:39:15,887 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 19:39:15,887 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 19:39:15,887 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 19:39:15,888 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 19:39:15,888 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 19:39:15,891 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 19:39:15,923 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 19:39:15,923 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 19:39:15,924 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 19:39:15,924 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 19:39:15,925 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 19:39:15,925 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 19:39:15,925 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 19:39:15,926 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 19:39:15,926 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 19:39:15,926 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 19:39:15,927 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 19:39:15,927 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 19:39:15,927 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 19:39:15,927 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 19:39:15,927 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 19:39:15,927 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 19:39:15,927 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 19:39:15,928 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 19:39:15,928 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 19:39:15,928 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 19:39:15,928 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 19:39:15,928 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 19:39:15,928 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 19:39:15,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 19:39:15,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:39:15,929 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 19:39:15,929 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 19:39:15,929 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 19:39:15,929 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 19:39:15,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 19:39:15,929 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 19:39:15,930 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 19:39:15,930 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 19:39:15,930 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 19:39:15,930 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 19:39:15,930 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c245694d80bb36f575f27eb50fa261b26ec38a4ced597397981ad6c6c7486707 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 19:39:16,205 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 19:39:16,221 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 19:39:16,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 19:39:16,224 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 19:39:16,224 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 19:39:16,226 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-2.wvr.c [2023-08-30 19:39:17,397 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 19:39:17,600 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 19:39:17,600 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-2.wvr.c [2023-08-30 19:39:17,607 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94fd45efd/d260da5020fe4d3ca6cbbd0bc54c0c96/FLAGdaf6f2fae [2023-08-30 19:39:17,618 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94fd45efd/d260da5020fe4d3ca6cbbd0bc54c0c96 [2023-08-30 19:39:17,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 19:39:17,621 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 19:39:17,622 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 19:39:17,622 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 19:39:17,625 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 19:39:17,626 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:39:17" (1/1) ... [2023-08-30 19:39:17,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7352362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:17, skipping insertion in model container [2023-08-30 19:39:17,627 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:39:17" (1/1) ... [2023-08-30 19:39:17,632 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 19:39:17,644 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 19:39:17,764 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-2.wvr.c[2554,2567] [2023-08-30 19:39:17,768 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:39:17,775 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 19:39:17,802 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-2.wvr.c[2554,2567] [2023-08-30 19:39:17,809 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:39:17,815 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 19:39:17,817 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 19:39:17,822 INFO L208 MainTranslator]: Completed translation [2023-08-30 19:39:17,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:17 WrapperNode [2023-08-30 19:39:17,823 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 19:39:17,824 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 19:39:17,824 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 19:39:17,824 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 19:39:17,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:17" (1/1) ... [2023-08-30 19:39:17,848 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:17" (1/1) ... [2023-08-30 19:39:17,872 INFO L138 Inliner]: procedures = 21, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2023-08-30 19:39:17,872 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 19:39:17,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 19:39:17,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 19:39:17,875 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 19:39:17,882 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:17" (1/1) ... [2023-08-30 19:39:17,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:17" (1/1) ... [2023-08-30 19:39:17,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:17" (1/1) ... [2023-08-30 19:39:17,886 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:17" (1/1) ... [2023-08-30 19:39:17,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:17" (1/1) ... [2023-08-30 19:39:17,904 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:17" (1/1) ... [2023-08-30 19:39:17,909 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:17" (1/1) ... [2023-08-30 19:39:17,914 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:17" (1/1) ... [2023-08-30 19:39:17,916 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 19:39:17,918 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 19:39:17,919 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 19:39:17,919 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 19:39:17,920 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:17" (1/1) ... [2023-08-30 19:39:17,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:39:17,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:39:17,954 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 19:39:17,979 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 19:39:17,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 19:39:17,993 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 19:39:17,993 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 19:39:17,994 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 19:39:17,995 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 19:39:17,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 19:39:17,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 19:39:17,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 19:39:17,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 19:39:17,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 19:39:17,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 19:39:17,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 19:39:17,995 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 19:39:17,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 19:39:17,997 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 19:39:18,131 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 19:39:18,133 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 19:39:18,396 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 19:39:18,416 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 19:39:18,416 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 19:39:18,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:39:18 BoogieIcfgContainer [2023-08-30 19:39:18,418 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 19:39:18,420 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 19:39:18,420 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 19:39:18,423 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 19:39:18,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:39:17" (1/3) ... [2023-08-30 19:39:18,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ba53d69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:39:18, skipping insertion in model container [2023-08-30 19:39:18,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:39:17" (2/3) ... [2023-08-30 19:39:18,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ba53d69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:39:18, skipping insertion in model container [2023-08-30 19:39:18,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:39:18" (3/3) ... [2023-08-30 19:39:18,426 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-2.wvr.c [2023-08-30 19:39:18,432 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 19:39:18,440 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 19:39:18,441 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 19:39:18,441 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 19:39:18,513 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 19:39:18,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 103 transitions, 222 flow [2023-08-30 19:39:18,622 INFO L130 PetriNetUnfolder]: 8/101 cut-off events. [2023-08-30 19:39:18,623 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 19:39:18,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 101 events. 8/101 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 67 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 65. Up to 2 conditions per place. [2023-08-30 19:39:18,628 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 103 transitions, 222 flow [2023-08-30 19:39:18,633 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 93 transitions, 198 flow [2023-08-30 19:39:18,636 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 19:39:18,650 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 92 places, 93 transitions, 198 flow [2023-08-30 19:39:18,652 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 92 places, 93 transitions, 198 flow [2023-08-30 19:39:18,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 93 transitions, 198 flow [2023-08-30 19:39:18,675 INFO L130 PetriNetUnfolder]: 8/93 cut-off events. [2023-08-30 19:39:18,675 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 19:39:18,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 93 events. 8/93 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 65. Up to 2 conditions per place. [2023-08-30 19:39:18,677 INFO L119 LiptonReduction]: Number of co-enabled transitions 728 [2023-08-30 19:39:21,085 INFO L134 LiptonReduction]: Checked pairs total: 789 [2023-08-30 19:39:21,086 INFO L136 LiptonReduction]: Total number of compositions: 94 [2023-08-30 19:39:21,097 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 19:39:21,102 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;@1767f7e7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 19:39:21,103 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 19:39:21,107 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2023-08-30 19:39:21,107 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 19:39:21,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:21,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:21,108 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:39:21,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:21,113 INFO L85 PathProgramCache]: Analyzing trace with hash 285965286, now seen corresponding path program 1 times [2023-08-30 19:39:21,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:21,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389198540] [2023-08-30 19:39:21,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:21,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:21,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:21,498 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 19:39:21,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:21,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389198540] [2023-08-30 19:39:21,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389198540] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:39:21,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:39:21,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 19:39:21,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271144307] [2023-08-30 19:39:21,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:39:21,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 19:39:21,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:21,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 19:39:21,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 19:39:21,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 197 [2023-08-30 19:39:21,562 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 13 transitions, 38 flow. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 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 19:39:21,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:21,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 197 [2023-08-30 19:39:21,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:21,628 INFO L130 PetriNetUnfolder]: 41/77 cut-off events. [2023-08-30 19:39:21,629 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 19:39:21,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 77 events. 41/77 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 163 event pairs, 9 based on Foata normal form. 1/54 useless extension candidates. Maximal degree in co-relation 120. Up to 51 conditions per place. [2023-08-30 19:39:21,632 INFO L137 encePairwiseOnDemand]: 193/197 looper letters, 19 selfloop transitions, 3 changer transitions 1/23 dead transitions. [2023-08-30 19:39:21,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 23 transitions, 113 flow [2023-08-30 19:39:21,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 19:39:21,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 19:39:21,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 288 transitions. [2023-08-30 19:39:21,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4873096446700508 [2023-08-30 19:39:21,652 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 288 transitions. [2023-08-30 19:39:21,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 288 transitions. [2023-08-30 19:39:21,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:21,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 288 transitions. [2023-08-30 19:39:21,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 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 19:39:21,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 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 19:39:21,669 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 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 19:39:21,671 INFO L175 Difference]: Start difference. First operand has 18 places, 13 transitions, 38 flow. Second operand 3 states and 288 transitions. [2023-08-30 19:39:21,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 23 transitions, 113 flow [2023-08-30 19:39:21,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 23 transitions, 99 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 19:39:21,675 INFO L231 Difference]: Finished difference. Result has 17 places, 15 transitions, 49 flow [2023-08-30 19:39:21,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=49, PETRI_PLACES=17, PETRI_TRANSITIONS=15} [2023-08-30 19:39:21,681 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, -1 predicate places. [2023-08-30 19:39:21,682 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 15 transitions, 49 flow [2023-08-30 19:39:21,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 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 19:39:21,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:21,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:21,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 19:39:21,686 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:39:21,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:21,688 INFO L85 PathProgramCache]: Analyzing trace with hash 275674925, now seen corresponding path program 1 times [2023-08-30 19:39:21,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:21,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090336206] [2023-08-30 19:39:21,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:21,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:21,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:21,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:39:21,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:21,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090336206] [2023-08-30 19:39:21,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090336206] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:39:21,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:39:21,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 19:39:21,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167219231] [2023-08-30 19:39:21,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:39:21,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:39:21,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:21,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:39:21,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:39:21,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 197 [2023-08-30 19:39:21,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 15 transitions, 49 flow. Second operand has 4 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 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 19:39:21,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:21,979 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 197 [2023-08-30 19:39:21,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:22,069 INFO L130 PetriNetUnfolder]: 49/99 cut-off events. [2023-08-30 19:39:22,069 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-08-30 19:39:22,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 99 events. 49/99 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 273 event pairs, 5 based on Foata normal form. 8/107 useless extension candidates. Maximal degree in co-relation 57. Up to 47 conditions per place. [2023-08-30 19:39:22,070 INFO L137 encePairwiseOnDemand]: 192/197 looper letters, 29 selfloop transitions, 7 changer transitions 2/38 dead transitions. [2023-08-30 19:39:22,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 38 transitions, 189 flow [2023-08-30 19:39:22,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:39:22,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:39:22,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 436 transitions. [2023-08-30 19:39:22,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44263959390862945 [2023-08-30 19:39:22,073 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 436 transitions. [2023-08-30 19:39:22,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 436 transitions. [2023-08-30 19:39:22,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:22,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 436 transitions. [2023-08-30 19:39:22,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 87.2) internal successors, (436), 5 states have internal predecessors, (436), 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 19:39:22,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 197.0) internal successors, (1182), 6 states have internal predecessors, (1182), 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 19:39:22,077 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 197.0) internal successors, (1182), 6 states have internal predecessors, (1182), 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 19:39:22,078 INFO L175 Difference]: Start difference. First operand has 17 places, 15 transitions, 49 flow. Second operand 5 states and 436 transitions. [2023-08-30 19:39:22,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 38 transitions, 189 flow [2023-08-30 19:39:22,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 38 transitions, 185 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 19:39:22,079 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 102 flow [2023-08-30 19:39:22,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=102, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-08-30 19:39:22,080 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 5 predicate places. [2023-08-30 19:39:22,081 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 102 flow [2023-08-30 19:39:22,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 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 19:39:22,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:22,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:22,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 19:39:22,082 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:39:22,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:22,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1439336439, now seen corresponding path program 2 times [2023-08-30 19:39:22,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:22,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424623210] [2023-08-30 19:39:22,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:22,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:22,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:22,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:39:22,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:22,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424623210] [2023-08-30 19:39:22,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424623210] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:39:22,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:39:22,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 19:39:22,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847434467] [2023-08-30 19:39:22,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:39:22,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:39:22,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:22,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:39:22,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:39:22,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 197 [2023-08-30 19:39:22,233 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 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 19:39:22,233 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:22,233 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 197 [2023-08-30 19:39:22,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:22,314 INFO L130 PetriNetUnfolder]: 45/93 cut-off events. [2023-08-30 19:39:22,314 INFO L131 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2023-08-30 19:39:22,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 93 events. 45/93 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 228 event pairs, 11 based on Foata normal form. 4/97 useless extension candidates. Maximal degree in co-relation 216. Up to 59 conditions per place. [2023-08-30 19:39:22,316 INFO L137 encePairwiseOnDemand]: 193/197 looper letters, 20 selfloop transitions, 6 changer transitions 6/32 dead transitions. [2023-08-30 19:39:22,316 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 32 transitions, 207 flow [2023-08-30 19:39:22,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 19:39:22,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 19:39:22,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 348 transitions. [2023-08-30 19:39:22,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4416243654822335 [2023-08-30 19:39:22,318 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 348 transitions. [2023-08-30 19:39:22,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 348 transitions. [2023-08-30 19:39:22,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:22,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 348 transitions. [2023-08-30 19:39:22,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 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 19:39:22,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 197.0) internal successors, (985), 5 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:22,322 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 197.0) internal successors, (985), 5 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:22,322 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 102 flow. Second operand 4 states and 348 transitions. [2023-08-30 19:39:22,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 32 transitions, 207 flow [2023-08-30 19:39:22,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 32 transitions, 207 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 19:39:22,326 INFO L231 Difference]: Finished difference. Result has 27 places, 20 transitions, 119 flow [2023-08-30 19:39:22,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=119, PETRI_PLACES=27, PETRI_TRANSITIONS=20} [2023-08-30 19:39:22,328 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 9 predicate places. [2023-08-30 19:39:22,330 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 20 transitions, 119 flow [2023-08-30 19:39:22,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 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 19:39:22,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:22,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:22,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 19:39:22,332 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:39:22,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:22,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1223174604, now seen corresponding path program 1 times [2023-08-30 19:39:22,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:22,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930542606] [2023-08-30 19:39:22,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:22,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:22,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:22,485 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 19:39:22,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:22,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930542606] [2023-08-30 19:39:22,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930542606] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:39:22,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223628926] [2023-08-30 19:39:22,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:22,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:22,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:39:22,493 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 19:39:22,503 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 19:39:22,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:22,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 19:39:22,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:39:22,882 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 19:39:22,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:39:23,049 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 19:39:23,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223628926] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:39:23,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:39:23,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 19:39:23,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403482500] [2023-08-30 19:39:23,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:39:23,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 19:39:23,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:23,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 19:39:23,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-30 19:39:23,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 197 [2023-08-30 19:39:23,126 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 119 flow. Second operand has 7 states, 7 states have (on average 80.71428571428571) internal successors, (565), 7 states have internal predecessors, (565), 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 19:39:23,127 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:23,127 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 197 [2023-08-30 19:39:23,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:23,264 INFO L130 PetriNetUnfolder]: 67/137 cut-off events. [2023-08-30 19:39:23,264 INFO L131 PetriNetUnfolder]: For 194/194 co-relation queries the response was YES. [2023-08-30 19:39:23,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 137 events. 67/137 cut-off events. For 194/194 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 400 event pairs, 2 based on Foata normal form. 20/157 useless extension candidates. Maximal degree in co-relation 342. Up to 65 conditions per place. [2023-08-30 19:39:23,266 INFO L137 encePairwiseOnDemand]: 192/197 looper letters, 35 selfloop transitions, 10 changer transitions 4/49 dead transitions. [2023-08-30 19:39:23,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 49 transitions, 348 flow [2023-08-30 19:39:23,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 19:39:23,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 19:39:23,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 508 transitions. [2023-08-30 19:39:23,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42978003384094754 [2023-08-30 19:39:23,268 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 508 transitions. [2023-08-30 19:39:23,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 508 transitions. [2023-08-30 19:39:23,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:23,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 508 transitions. [2023-08-30 19:39:23,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 84.66666666666667) internal successors, (508), 6 states have internal predecessors, (508), 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 19:39:23,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 197.0) internal successors, (1379), 7 states have internal predecessors, (1379), 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 19:39:23,272 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 197.0) internal successors, (1379), 7 states have internal predecessors, (1379), 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 19:39:23,272 INFO L175 Difference]: Start difference. First operand has 27 places, 20 transitions, 119 flow. Second operand 6 states and 508 transitions. [2023-08-30 19:39:23,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 49 transitions, 348 flow [2023-08-30 19:39:23,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 49 transitions, 317 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-08-30 19:39:23,275 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 182 flow [2023-08-30 19:39:23,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2023-08-30 19:39:23,276 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 14 predicate places. [2023-08-30 19:39:23,276 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 182 flow [2023-08-30 19:39:23,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 80.71428571428571) internal successors, (565), 7 states have internal predecessors, (565), 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 19:39:23,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:23,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:23,287 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 19:39:23,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:23,487 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:39:23,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:23,488 INFO L85 PathProgramCache]: Analyzing trace with hash 2057316734, now seen corresponding path program 2 times [2023-08-30 19:39:23,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:23,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191659725] [2023-08-30 19:39:23,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:23,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:23,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:23,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:39:23,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:23,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191659725] [2023-08-30 19:39:23,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191659725] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:39:23,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:39:23,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 19:39:23,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670601652] [2023-08-30 19:39:23,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:39:23,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:39:23,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:23,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:39:23,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:39:23,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 197 [2023-08-30 19:39:23,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 182 flow. Second operand has 4 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 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 19:39:23,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:23,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 197 [2023-08-30 19:39:23,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:23,725 INFO L130 PetriNetUnfolder]: 69/141 cut-off events. [2023-08-30 19:39:23,725 INFO L131 PetriNetUnfolder]: For 348/348 co-relation queries the response was YES. [2023-08-30 19:39:23,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 601 conditions, 141 events. 69/141 cut-off events. For 348/348 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 400 event pairs, 9 based on Foata normal form. 2/143 useless extension candidates. Maximal degree in co-relation 400. Up to 62 conditions per place. [2023-08-30 19:39:23,728 INFO L137 encePairwiseOnDemand]: 192/197 looper letters, 35 selfloop transitions, 8 changer transitions 2/45 dead transitions. [2023-08-30 19:39:23,728 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 45 transitions, 377 flow [2023-08-30 19:39:23,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 19:39:23,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 19:39:23,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 432 transitions. [2023-08-30 19:39:23,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4385786802030457 [2023-08-30 19:39:23,730 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 432 transitions. [2023-08-30 19:39:23,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 432 transitions. [2023-08-30 19:39:23,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:23,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 432 transitions. [2023-08-30 19:39:23,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 86.4) internal successors, (432), 5 states have internal predecessors, (432), 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 19:39:23,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 197.0) internal successors, (1182), 6 states have internal predecessors, (1182), 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 19:39:23,734 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 197.0) internal successors, (1182), 6 states have internal predecessors, (1182), 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 19:39:23,734 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 182 flow. Second operand 5 states and 432 transitions. [2023-08-30 19:39:23,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 45 transitions, 377 flow [2023-08-30 19:39:23,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 45 transitions, 356 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-30 19:39:23,740 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 217 flow [2023-08-30 19:39:23,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=217, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2023-08-30 19:39:23,742 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 19 predicate places. [2023-08-30 19:39:23,742 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 217 flow [2023-08-30 19:39:23,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 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 19:39:23,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:23,743 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:23,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 19:39:23,744 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:39:23,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:23,744 INFO L85 PathProgramCache]: Analyzing trace with hash 18175184, now seen corresponding path program 1 times [2023-08-30 19:39:23,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:23,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302363661] [2023-08-30 19:39:23,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:23,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:23,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:24,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:39:24,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:24,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302363661] [2023-08-30 19:39:24,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302363661] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:39:24,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658545360] [2023-08-30 19:39:24,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:24,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:24,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:39:24,071 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 19:39:24,100 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 19:39:24,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:24,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 19:39:24,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:39:24,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:39:24,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:39:24,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:39:24,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658545360] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:39:24,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:39:24,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2023-08-30 19:39:24,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031199852] [2023-08-30 19:39:24,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:39:24,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 19:39:24,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:24,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 19:39:24,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 19:39:24,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 197 [2023-08-30 19:39:24,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 217 flow. Second operand has 8 states, 8 states have (on average 84.125) internal successors, (673), 8 states have internal predecessors, (673), 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 19:39:24,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:24,746 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 197 [2023-08-30 19:39:24,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:24,944 INFO L130 PetriNetUnfolder]: 151/294 cut-off events. [2023-08-30 19:39:24,944 INFO L131 PetriNetUnfolder]: For 923/923 co-relation queries the response was YES. [2023-08-30 19:39:24,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1355 conditions, 294 events. 151/294 cut-off events. For 923/923 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1083 event pairs, 20 based on Foata normal form. 24/318 useless extension candidates. Maximal degree in co-relation 748. Up to 121 conditions per place. [2023-08-30 19:39:24,948 INFO L137 encePairwiseOnDemand]: 193/197 looper letters, 62 selfloop transitions, 15 changer transitions 0/77 dead transitions. [2023-08-30 19:39:24,948 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 77 transitions, 686 flow [2023-08-30 19:39:24,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 19:39:24,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 19:39:24,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 614 transitions. [2023-08-30 19:39:24,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452501812907904 [2023-08-30 19:39:24,950 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 614 transitions. [2023-08-30 19:39:24,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 614 transitions. [2023-08-30 19:39:24,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:24,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 614 transitions. [2023-08-30 19:39:24,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.71428571428571) internal successors, (614), 7 states have internal predecessors, (614), 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 19:39:24,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 197.0) internal successors, (1576), 8 states have internal predecessors, (1576), 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 19:39:24,955 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 197.0) internal successors, (1576), 8 states have internal predecessors, (1576), 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 19:39:24,955 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 217 flow. Second operand 7 states and 614 transitions. [2023-08-30 19:39:24,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 77 transitions, 686 flow [2023-08-30 19:39:24,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 77 transitions, 682 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-30 19:39:24,959 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 363 flow [2023-08-30 19:39:24,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=363, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2023-08-30 19:39:24,960 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 27 predicate places. [2023-08-30 19:39:24,960 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 363 flow [2023-08-30 19:39:24,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 84.125) internal successors, (673), 8 states have internal predecessors, (673), 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 19:39:24,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:24,961 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:24,971 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 19:39:25,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-30 19:39:25,172 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:39:25,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:25,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1308914164, now seen corresponding path program 2 times [2023-08-30 19:39:25,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:25,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35007650] [2023-08-30 19:39:25,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:25,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:25,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:25,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:39:25,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:25,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35007650] [2023-08-30 19:39:25,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35007650] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:39:25,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251725424] [2023-08-30 19:39:25,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:39:25,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:25,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:39:25,921 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 19:39:25,945 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 19:39:26,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:39:26,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:39:26,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 19:39:26,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:39:26,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:39:26,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:39:26,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:39:26,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251725424] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:39:26,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:39:26,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-30 19:39:26,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588703368] [2023-08-30 19:39:26,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:39:26,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 19:39:26,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:26,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 19:39:26,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-08-30 19:39:27,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 197 [2023-08-30 19:39:27,237 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 363 flow. Second operand has 12 states, 12 states have (on average 73.75) internal successors, (885), 12 states have internal predecessors, (885), 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 19:39:27,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:27,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 197 [2023-08-30 19:39:27,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:27,715 INFO L130 PetriNetUnfolder]: 298/596 cut-off events. [2023-08-30 19:39:27,715 INFO L131 PetriNetUnfolder]: For 2519/2519 co-relation queries the response was YES. [2023-08-30 19:39:27,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2935 conditions, 596 events. 298/596 cut-off events. For 2519/2519 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2915 event pairs, 14 based on Foata normal form. 5/601 useless extension candidates. Maximal degree in co-relation 1364. Up to 233 conditions per place. [2023-08-30 19:39:27,720 INFO L137 encePairwiseOnDemand]: 192/197 looper letters, 62 selfloop transitions, 47 changer transitions 2/111 dead transitions. [2023-08-30 19:39:27,721 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 111 transitions, 1116 flow [2023-08-30 19:39:27,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 19:39:27,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 19:39:27,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 777 transitions. [2023-08-30 19:39:27,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39441624365482236 [2023-08-30 19:39:27,724 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 777 transitions. [2023-08-30 19:39:27,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 777 transitions. [2023-08-30 19:39:27,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:27,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 777 transitions. [2023-08-30 19:39:27,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 77.7) internal successors, (777), 10 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:39:27,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 197.0) internal successors, (2167), 11 states have internal predecessors, (2167), 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 19:39:27,729 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 197.0) internal successors, (2167), 11 states have internal predecessors, (2167), 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 19:39:27,729 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 363 flow. Second operand 10 states and 777 transitions. [2023-08-30 19:39:27,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 111 transitions, 1116 flow [2023-08-30 19:39:27,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 111 transitions, 1033 flow, removed 37 selfloop flow, removed 2 redundant places. [2023-08-30 19:39:27,745 INFO L231 Difference]: Finished difference. Result has 57 places, 73 transitions, 841 flow [2023-08-30 19:39:27,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=841, PETRI_PLACES=57, PETRI_TRANSITIONS=73} [2023-08-30 19:39:27,746 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 39 predicate places. [2023-08-30 19:39:27,746 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 73 transitions, 841 flow [2023-08-30 19:39:27,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 73.75) internal successors, (885), 12 states have internal predecessors, (885), 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 19:39:27,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:27,747 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:27,755 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 19:39:27,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:27,953 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:39:27,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:27,953 INFO L85 PathProgramCache]: Analyzing trace with hash -970027468, now seen corresponding path program 3 times [2023-08-30 19:39:27,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:27,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45241078] [2023-08-30 19:39:27,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:27,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:28,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:39:28,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:28,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45241078] [2023-08-30 19:39:28,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45241078] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:39:28,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790072753] [2023-08-30 19:39:28,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:39:28,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:28,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:39:28,817 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 19:39:28,842 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 19:39:28,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 19:39:28,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:39:28,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 19:39:28,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:39:29,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:39:29,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:39:30,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:39:30,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790072753] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:39:30,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:39:30,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 12 [2023-08-30 19:39:30,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456424567] [2023-08-30 19:39:30,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:39:30,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 19:39:30,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:30,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 19:39:30,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-08-30 19:39:30,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 197 [2023-08-30 19:39:30,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 73 transitions, 841 flow. Second operand has 14 states, 14 states have (on average 78.35714285714286) internal successors, (1097), 14 states have internal predecessors, (1097), 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 19:39:30,801 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:30,801 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 197 [2023-08-30 19:39:30,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:32,131 INFO L130 PetriNetUnfolder]: 431/881 cut-off events. [2023-08-30 19:39:32,132 INFO L131 PetriNetUnfolder]: For 4963/4963 co-relation queries the response was YES. [2023-08-30 19:39:32,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4694 conditions, 881 events. 431/881 cut-off events. For 4963/4963 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4918 event pairs, 16 based on Foata normal form. 6/887 useless extension candidates. Maximal degree in co-relation 3804. Up to 339 conditions per place. [2023-08-30 19:39:32,140 INFO L137 encePairwiseOnDemand]: 192/197 looper letters, 57 selfloop transitions, 101 changer transitions 2/160 dead transitions. [2023-08-30 19:39:32,140 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 160 transitions, 1791 flow [2023-08-30 19:39:32,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 19:39:32,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 19:39:32,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1225 transitions. [2023-08-30 19:39:32,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41455160744500846 [2023-08-30 19:39:32,148 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1225 transitions. [2023-08-30 19:39:32,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1225 transitions. [2023-08-30 19:39:32,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:32,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1225 transitions. [2023-08-30 19:39:32,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 81.66666666666667) internal successors, (1225), 15 states have internal predecessors, (1225), 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 19:39:32,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 197.0) internal successors, (3152), 16 states have internal predecessors, (3152), 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 19:39:32,158 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 197.0) internal successors, (3152), 16 states have internal predecessors, (3152), 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 19:39:32,158 INFO L175 Difference]: Start difference. First operand has 57 places, 73 transitions, 841 flow. Second operand 15 states and 1225 transitions. [2023-08-30 19:39:32,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 160 transitions, 1791 flow [2023-08-30 19:39:32,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 160 transitions, 1700 flow, removed 44 selfloop flow, removed 1 redundant places. [2023-08-30 19:39:32,174 INFO L231 Difference]: Finished difference. Result has 71 places, 111 transitions, 1378 flow [2023-08-30 19:39:32,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=750, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1378, PETRI_PLACES=71, PETRI_TRANSITIONS=111} [2023-08-30 19:39:32,176 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 53 predicate places. [2023-08-30 19:39:32,176 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 111 transitions, 1378 flow [2023-08-30 19:39:32,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 78.35714285714286) internal successors, (1097), 14 states have internal predecessors, (1097), 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 19:39:32,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:32,177 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:32,183 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 19:39:32,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:32,383 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:39:32,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:32,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1894613441, now seen corresponding path program 4 times [2023-08-30 19:39:32,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:32,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584268139] [2023-08-30 19:39:32,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:32,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:32,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:32,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:39:32,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:32,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584268139] [2023-08-30 19:39:32,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584268139] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:39:32,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145455714] [2023-08-30 19:39:32,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:39:32,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:32,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:39:32,631 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 19:39:32,633 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 19:39:32,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:39:32,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:39:32,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 19:39:32,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:39:32,836 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:39:32,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:39:33,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:39:33,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145455714] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:39:33,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:39:33,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 15 [2023-08-30 19:39:33,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617344243] [2023-08-30 19:39:33,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:39:33,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 19:39:33,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:39:33,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 19:39:33,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2023-08-30 19:39:33,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 197 [2023-08-30 19:39:33,287 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 111 transitions, 1378 flow. Second operand has 16 states, 16 states have (on average 82.625) internal successors, (1322), 16 states have internal predecessors, (1322), 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 19:39:33,287 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:39:33,288 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 197 [2023-08-30 19:39:33,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:39:42,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 19:39:46,371 INFO L130 PetriNetUnfolder]: 988/2041 cut-off events. [2023-08-30 19:39:46,372 INFO L131 PetriNetUnfolder]: For 15755/15755 co-relation queries the response was YES. [2023-08-30 19:39:46,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11713 conditions, 2041 events. 988/2041 cut-off events. For 15755/15755 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 14051 event pairs, 0 based on Foata normal form. 402/2443 useless extension candidates. Maximal degree in co-relation 10000. Up to 751 conditions per place. [2023-08-30 19:39:46,388 INFO L137 encePairwiseOnDemand]: 192/197 looper letters, 197 selfloop transitions, 244 changer transitions 141/582 dead transitions. [2023-08-30 19:39:46,388 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 582 transitions, 7744 flow [2023-08-30 19:39:46,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-08-30 19:39:46,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-08-30 19:39:46,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 5694 transitions. [2023-08-30 19:39:46,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4313963179028714 [2023-08-30 19:39:46,404 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 5694 transitions. [2023-08-30 19:39:46,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 5694 transitions. [2023-08-30 19:39:46,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:39:46,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 5694 transitions. [2023-08-30 19:39:46,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 84.98507462686567) internal successors, (5694), 67 states have internal predecessors, (5694), 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 19:39:46,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 197.0) internal successors, (13396), 68 states have internal predecessors, (13396), 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 19:39:46,442 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 197.0) internal successors, (13396), 68 states have internal predecessors, (13396), 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 19:39:46,443 INFO L175 Difference]: Start difference. First operand has 71 places, 111 transitions, 1378 flow. Second operand 67 states and 5694 transitions. [2023-08-30 19:39:46,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 582 transitions, 7744 flow [2023-08-30 19:39:46,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 582 transitions, 6062 flow, removed 744 selfloop flow, removed 8 redundant places. [2023-08-30 19:39:46,542 INFO L231 Difference]: Finished difference. Result has 138 places, 302 transitions, 3518 flow [2023-08-30 19:39:46,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=3518, PETRI_PLACES=138, PETRI_TRANSITIONS=302} [2023-08-30 19:39:46,544 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 120 predicate places. [2023-08-30 19:39:46,544 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 302 transitions, 3518 flow [2023-08-30 19:39:46,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 82.625) internal successors, (1322), 16 states have internal predecessors, (1322), 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 19:39:46,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:39:46,545 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:39:46,558 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 19:39:46,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:46,753 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:39:46,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:39:46,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1403469600, now seen corresponding path program 5 times [2023-08-30 19:39:46,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:39:46,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821064109] [2023-08-30 19:39:46,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:39:46,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:39:46,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:39:47,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:39:47,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:39:47,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821064109] [2023-08-30 19:39:47,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821064109] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:39:47,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686504406] [2023-08-30 19:39:47,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:39:47,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:39:47,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:39:47,025 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:39:47,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 19:39:47,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 19:39:47,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:39:47,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 19:39:47,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:39:50,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:39:50,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:40:11,902 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:11,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686504406] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:40:11,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:40:11,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 17 [2023-08-30 19:40:11,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102290483] [2023-08-30 19:40:11,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:40:11,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 19:40:11,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:40:11,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 19:40:11,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=239, Unknown=1, NotChecked=0, Total=306 [2023-08-30 19:40:12,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 197 [2023-08-30 19:40:12,312 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 302 transitions, 3518 flow. Second operand has 18 states, 18 states have (on average 81.44444444444444) internal successors, (1466), 18 states have internal predecessors, (1466), 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 19:40:12,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:40:12,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 197 [2023-08-30 19:40:12,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:40:20,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 19:40:27,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 19:40:33,810 INFO L130 PetriNetUnfolder]: 1011/1870 cut-off events. [2023-08-30 19:40:33,811 INFO L131 PetriNetUnfolder]: For 9484/9484 co-relation queries the response was YES. [2023-08-30 19:40:33,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10487 conditions, 1870 events. 1011/1870 cut-off events. For 9484/9484 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 10765 event pairs, 4 based on Foata normal form. 116/1986 useless extension candidates. Maximal degree in co-relation 10422. Up to 662 conditions per place. [2023-08-30 19:40:33,827 INFO L137 encePairwiseOnDemand]: 192/197 looper letters, 311 selfloop transitions, 307 changer transitions 0/618 dead transitions. [2023-08-30 19:40:33,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 618 transitions, 7552 flow [2023-08-30 19:40:33,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-30 19:40:33,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-30 19:40:33,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 3595 transitions. [2023-08-30 19:40:33,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42438909219690707 [2023-08-30 19:40:33,836 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 3595 transitions. [2023-08-30 19:40:33,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 3595 transitions. [2023-08-30 19:40:33,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:40:33,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 3595 transitions. [2023-08-30 19:40:33,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 83.6046511627907) internal successors, (3595), 43 states have internal predecessors, (3595), 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 19:40:33,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 197.0) internal successors, (8668), 44 states have internal predecessors, (8668), 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 19:40:33,876 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 197.0) internal successors, (8668), 44 states have internal predecessors, (8668), 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 19:40:33,876 INFO L175 Difference]: Start difference. First operand has 138 places, 302 transitions, 3518 flow. Second operand 43 states and 3595 transitions. [2023-08-30 19:40:33,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 618 transitions, 7552 flow [2023-08-30 19:40:33,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 618 transitions, 5921 flow, removed 729 selfloop flow, removed 16 redundant places. [2023-08-30 19:40:33,956 INFO L231 Difference]: Finished difference. Result has 171 places, 480 transitions, 5316 flow [2023-08-30 19:40:33,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=2498, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=5316, PETRI_PLACES=171, PETRI_TRANSITIONS=480} [2023-08-30 19:40:33,958 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 153 predicate places. [2023-08-30 19:40:33,958 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 480 transitions, 5316 flow [2023-08-30 19:40:33,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 81.44444444444444) internal successors, (1466), 18 states have internal predecessors, (1466), 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 19:40:33,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:40:33,959 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:40:33,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 19:40:34,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:40:34,167 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:40:34,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:40:34,168 INFO L85 PathProgramCache]: Analyzing trace with hash -2100218938, now seen corresponding path program 6 times [2023-08-30 19:40:34,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:40:34,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109796009] [2023-08-30 19:40:34,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:40:34,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:40:34,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:40:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:40:34,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:40:34,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109796009] [2023-08-30 19:40:34,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109796009] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:40:34,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371884501] [2023-08-30 19:40:34,597 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:40:34,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:40:34,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:40:34,599 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:40:34,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 19:40:34,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 19:40:34,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:40:34,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 19:40:34,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:40:35,213 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:40:35,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:40:46,088 WARN L222 SmtUtils]: Spent 9.62s on a formula simplification. DAG size of input: 1192 DAG size of output: 1111 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15