./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/parallel-lamport.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --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-lamport.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 dda4e60b50ccb96ce521fa11aa956967863397082d82b1fb589f74967fe28a7c --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 01:53:54,974 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 01:53:54,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 01:53:55,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 01:53:55,008 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 01:53:55,010 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 01:53:55,010 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 01:53:55,011 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 01:53:55,013 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 01:53:55,016 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 01:53:55,017 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 01:53:55,018 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 01:53:55,018 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 01:53:55,019 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 01:53:55,019 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 01:53:55,020 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 01:53:55,021 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 01:53:55,022 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 01:53:55,023 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 01:53:55,025 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 01:53:55,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 01:53:55,031 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 01:53:55,031 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 01:53:55,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 01:53:55,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 01:53:55,042 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 01:53:55,042 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 01:53:55,042 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 01:53:55,043 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 01:53:55,043 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 01:53:55,043 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 01:53:55,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 01:53:55,044 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 01:53:55,045 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 01:53:55,046 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 01:53:55,046 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 01:53:55,046 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 01:53:55,046 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 01:53:55,047 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 01:53:55,047 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 01:53:55,048 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 01:53:55,049 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 01:53:55,070 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 01:53:55,071 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 01:53:55,072 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 01:53:55,072 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 01:53:55,073 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 01:53:55,073 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 01:53:55,073 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 01:53:55,074 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 01:53:55,074 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 01:53:55,074 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 01:53:55,074 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 01:53:55,075 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 01:53:55,075 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 01:53:55,075 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 01:53:55,075 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 01:53:55,075 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 01:53:55,075 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 01:53:55,076 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 01:53:55,076 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 01:53:55,076 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 01:53:55,076 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 01:53:55,076 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 01:53:55,076 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 01:53:55,076 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 01:53:55,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 01:53:55,077 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 01:53:55,077 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 01:53:55,077 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 01:53:55,077 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 01:53:55,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 01:53:55,078 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 01:53:55,078 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 01:53:55,078 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 01:53:55,078 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 01:53:55,078 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 01:53:55,078 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda4e60b50ccb96ce521fa11aa956967863397082d82b1fb589f74967fe28a7c Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 01:53:55,278 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 01:53:55,298 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 01:53:55,299 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 01:53:55,300 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 01:53:55,301 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 01:53:55,301 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-lamport.wvr.c [2023-08-31 01:53:56,358 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 01:53:56,556 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 01:53:56,556 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-lamport.wvr.c [2023-08-31 01:53:56,567 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cb867f59/39b1b9042b0549559f438f81b03a30c1/FLAG36b194e9f [2023-08-31 01:53:56,575 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cb867f59/39b1b9042b0549559f438f81b03a30c1 [2023-08-31 01:53:56,577 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 01:53:56,578 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 01:53:56,579 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 01:53:56,579 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 01:53:56,581 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 01:53:56,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 01:53:56" (1/1) ... [2023-08-31 01:53:56,582 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13bb001a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:53:56, skipping insertion in model container [2023-08-31 01:53:56,582 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 01:53:56" (1/1) ... [2023-08-31 01:53:56,588 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 01:53:56,599 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 01:53:56,711 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-lamport.wvr.c[4210,4223] [2023-08-31 01:53:56,722 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 01:53:56,730 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 01:53:56,757 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-lamport.wvr.c[4210,4223] [2023-08-31 01:53:56,765 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 01:53:56,771 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 01:53:56,772 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 01:53:56,776 INFO L208 MainTranslator]: Completed translation [2023-08-31 01:53:56,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:53:56 WrapperNode [2023-08-31 01:53:56,776 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 01:53:56,778 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 01:53:56,778 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 01:53:56,778 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 01:53:56,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:53:56" (1/1) ... [2023-08-31 01:53:56,796 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:53:56" (1/1) ... [2023-08-31 01:53:56,821 INFO L138 Inliner]: procedures = 25, calls = 89, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 243 [2023-08-31 01:53:56,822 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 01:53:56,823 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 01:53:56,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 01:53:56,824 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 01:53:56,829 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:53:56" (1/1) ... [2023-08-31 01:53:56,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:53:56" (1/1) ... [2023-08-31 01:53:56,840 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:53:56" (1/1) ... [2023-08-31 01:53:56,840 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:53:56" (1/1) ... [2023-08-31 01:53:56,848 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:53:56" (1/1) ... [2023-08-31 01:53:56,856 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:53:56" (1/1) ... [2023-08-31 01:53:56,858 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:53:56" (1/1) ... [2023-08-31 01:53:56,860 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:53:56" (1/1) ... [2023-08-31 01:53:56,862 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 01:53:56,864 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 01:53:56,864 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 01:53:56,865 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 01:53:56,865 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:53:56" (1/1) ... [2023-08-31 01:53:56,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 01:53:56,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:53:56,884 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) [2023-08-31 01:53:56,916 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 [2023-08-31 01:53:56,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 01:53:56,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 01:53:56,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 01:53:56,928 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 01:53:56,930 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 01:53:56,931 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 01:53:56,931 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 01:53:56,931 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 01:53:56,931 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-31 01:53:56,931 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-31 01:53:56,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 01:53:56,931 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 01:53:56,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 01:53:56,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 01:53:56,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 01:53:56,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 01:53:56,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 01:53:56,933 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 01:53:57,020 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 01:53:57,022 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 01:53:57,344 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 01:53:57,438 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 01:53:57,439 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-31 01:53:57,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 01:53:57 BoogieIcfgContainer [2023-08-31 01:53:57,441 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 01:53:57,444 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 01:53:57,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 01:53:57,448 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 01:53:57,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 01:53:56" (1/3) ... [2023-08-31 01:53:57,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b94d51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 01:53:57, skipping insertion in model container [2023-08-31 01:53:57,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:53:56" (2/3) ... [2023-08-31 01:53:57,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b94d51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 01:53:57, skipping insertion in model container [2023-08-31 01:53:57,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 01:53:57" (3/3) ... [2023-08-31 01:53:57,451 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-lamport.wvr.c [2023-08-31 01:53:57,456 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 01:53:57,462 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 01:53:57,462 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 01:53:57,462 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 01:53:57,515 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 01:53:57,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 180 transitions, 384 flow [2023-08-31 01:53:57,624 INFO L130 PetriNetUnfolder]: 7/177 cut-off events. [2023-08-31 01:53:57,624 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 01:53:57,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 177 events. 7/177 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 103 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 146. Up to 2 conditions per place. [2023-08-31 01:53:57,629 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 180 transitions, 384 flow [2023-08-31 01:53:57,634 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 167 transitions, 352 flow [2023-08-31 01:53:57,636 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 01:53:57,652 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 170 places, 167 transitions, 352 flow [2023-08-31 01:53:57,654 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 170 places, 167 transitions, 352 flow [2023-08-31 01:53:57,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 167 transitions, 352 flow [2023-08-31 01:53:57,703 INFO L130 PetriNetUnfolder]: 7/167 cut-off events. [2023-08-31 01:53:57,704 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 01:53:57,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 167 events. 7/167 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 101 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 146. Up to 2 conditions per place. [2023-08-31 01:53:57,707 INFO L119 LiptonReduction]: Number of co-enabled transitions 1266 [2023-08-31 01:54:02,206 INFO L134 LiptonReduction]: Checked pairs total: 7223 [2023-08-31 01:54:02,206 INFO L136 LiptonReduction]: Total number of compositions: 147 [2023-08-31 01:54:02,215 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 01:54:02,219 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;@39f3c156, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 01:54:02,219 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-31 01:54:02,223 INFO L130 PetriNetUnfolder]: 1/35 cut-off events. [2023-08-31 01:54:02,224 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 01:54:02,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:54:02,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:54:02,224 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:54:02,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:54:02,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1679152980, now seen corresponding path program 1 times [2023-08-31 01:54:02,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:54:02,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751836613] [2023-08-31 01:54:02,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:54:02,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:54:02,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:54:02,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:54:02,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:54:02,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751836613] [2023-08-31 01:54:02,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751836613] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:54:02,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:54:02,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 01:54:02,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954772374] [2023-08-31 01:54:02,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:54:02,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 01:54:02,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:54:02,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 01:54:02,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 01:54:02,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 327 [2023-08-31 01:54:02,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 36 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 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) [2023-08-31 01:54:02,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:54:02,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 327 [2023-08-31 01:54:02,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:54:02,825 INFO L130 PetriNetUnfolder]: 406/717 cut-off events. [2023-08-31 01:54:02,825 INFO L131 PetriNetUnfolder]: For 59/59 co-relation queries the response was YES. [2023-08-31 01:54:02,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1490 conditions, 717 events. 406/717 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3277 event pairs, 405 based on Foata normal form. 0/690 useless extension candidates. Maximal degree in co-relation 1330. Up to 667 conditions per place. [2023-08-31 01:54:02,838 INFO L137 encePairwiseOnDemand]: 324/327 looper letters, 25 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2023-08-31 01:54:02,838 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 37 transitions, 146 flow [2023-08-31 01:54:02,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 01:54:02,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 01:54:02,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 481 transitions. [2023-08-31 01:54:02,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49031600407747195 [2023-08-31 01:54:02,856 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 481 transitions. [2023-08-31 01:54:02,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 481 transitions. [2023-08-31 01:54:02,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:54:02,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 481 transitions. [2023-08-31 01:54:02,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 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) [2023-08-31 01:54:02,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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) [2023-08-31 01:54:02,868 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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) [2023-08-31 01:54:02,869 INFO L175 Difference]: Start difference. First operand has 45 places, 36 transitions, 90 flow. Second operand 3 states and 481 transitions. [2023-08-31 01:54:02,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 37 transitions, 146 flow [2023-08-31 01:54:02,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 37 transitions, 134 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-31 01:54:02,873 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 90 flow [2023-08-31 01:54:02,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2023-08-31 01:54:02,877 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -3 predicate places. [2023-08-31 01:54:02,877 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 90 flow [2023-08-31 01:54:02,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 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) [2023-08-31 01:54:02,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:54:02,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:54:02,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 01:54:02,878 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:54:02,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:54:02,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1807884856, now seen corresponding path program 1 times [2023-08-31 01:54:02,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:54:02,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215807336] [2023-08-31 01:54:02,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:54:02,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:54:02,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:54:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:54:03,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:54:03,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215807336] [2023-08-31 01:54:03,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215807336] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:54:03,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:54:03,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-31 01:54:03,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210734087] [2023-08-31 01:54:03,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:54:03,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 01:54:03,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:54:03,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 01:54:03,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-31 01:54:03,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 327 [2023-08-31 01:54:03,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 90 flow. Second operand has 7 states, 7 states have (on average 146.28571428571428) internal successors, (1024), 7 states have internal predecessors, (1024), 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) [2023-08-31 01:54:03,057 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:54:03,057 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 327 [2023-08-31 01:54:03,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:54:03,376 INFO L130 PetriNetUnfolder]: 1344/2387 cut-off events. [2023-08-31 01:54:03,376 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-31 01:54:03,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4683 conditions, 2387 events. 1344/2387 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13533 event pairs, 243 based on Foata normal form. 30/2415 useless extension candidates. Maximal degree in co-relation 4672. Up to 695 conditions per place. [2023-08-31 01:54:03,405 INFO L137 encePairwiseOnDemand]: 319/327 looper letters, 102 selfloop transitions, 16 changer transitions 0/124 dead transitions. [2023-08-31 01:54:03,405 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 124 transitions, 514 flow [2023-08-31 01:54:03,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:54:03,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:54:03,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1396 transitions. [2023-08-31 01:54:03,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4743459055385661 [2023-08-31 01:54:03,409 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1396 transitions. [2023-08-31 01:54:03,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1396 transitions. [2023-08-31 01:54:03,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:54:03,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1396 transitions. [2023-08-31 01:54:03,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 155.11111111111111) internal successors, (1396), 9 states have internal predecessors, (1396), 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) [2023-08-31 01:54:03,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 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) [2023-08-31 01:54:03,418 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 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) [2023-08-31 01:54:03,418 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 90 flow. Second operand 9 states and 1396 transitions. [2023-08-31 01:54:03,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 124 transitions, 514 flow [2023-08-31 01:54:03,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 124 transitions, 510 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 01:54:03,421 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 182 flow [2023-08-31 01:54:03,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=182, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2023-08-31 01:54:03,422 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2023-08-31 01:54:03,422 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 182 flow [2023-08-31 01:54:03,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.28571428571428) internal successors, (1024), 7 states have internal predecessors, (1024), 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) [2023-08-31 01:54:03,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:54:03,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:54:03,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 01:54:03,423 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:54:03,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:54:03,424 INFO L85 PathProgramCache]: Analyzing trace with hash -2091808474, now seen corresponding path program 2 times [2023-08-31 01:54:03,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:54:03,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924475581] [2023-08-31 01:54:03,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:54:03,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:54:03,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:54:03,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:54:03,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:54:03,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924475581] [2023-08-31 01:54:03,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924475581] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:54:03,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:54:03,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 01:54:03,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591863725] [2023-08-31 01:54:03,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:54:03,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 01:54:03,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:54:03,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 01:54:03,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 01:54:03,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 327 [2023-08-31 01:54:03,514 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 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) [2023-08-31 01:54:03,514 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:54:03,514 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 327 [2023-08-31 01:54:03,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:54:03,676 INFO L130 PetriNetUnfolder]: 1068/1983 cut-off events. [2023-08-31 01:54:03,676 INFO L131 PetriNetUnfolder]: For 375/375 co-relation queries the response was YES. [2023-08-31 01:54:03,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4383 conditions, 1983 events. 1068/1983 cut-off events. For 375/375 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11762 event pairs, 893 based on Foata normal form. 20/1959 useless extension candidates. Maximal degree in co-relation 4362. Up to 1600 conditions per place. [2023-08-31 01:54:03,684 INFO L137 encePairwiseOnDemand]: 324/327 looper letters, 44 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-08-31 01:54:03,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 61 transitions, 301 flow [2023-08-31 01:54:03,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 01:54:03,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 01:54:03,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 495 transitions. [2023-08-31 01:54:03,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5045871559633027 [2023-08-31 01:54:03,686 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 495 transitions. [2023-08-31 01:54:03,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 495 transitions. [2023-08-31 01:54:03,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:54:03,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 495 transitions. [2023-08-31 01:54:03,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 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) [2023-08-31 01:54:03,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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) [2023-08-31 01:54:03,689 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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) [2023-08-31 01:54:03,689 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 182 flow. Second operand 3 states and 495 transitions. [2023-08-31 01:54:03,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 61 transitions, 301 flow [2023-08-31 01:54:03,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 61 transitions, 301 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 01:54:03,694 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 190 flow [2023-08-31 01:54:03,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2023-08-31 01:54:03,694 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 12 predicate places. [2023-08-31 01:54:03,695 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 190 flow [2023-08-31 01:54:03,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 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) [2023-08-31 01:54:03,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:54:03,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:54:03,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 01:54:03,696 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:54:03,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:54:03,696 INFO L85 PathProgramCache]: Analyzing trace with hash 124098926, now seen corresponding path program 3 times [2023-08-31 01:54:03,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:54:03,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368464536] [2023-08-31 01:54:03,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:54:03,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:54:03,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:54:04,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:54:04,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:54:04,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368464536] [2023-08-31 01:54:04,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368464536] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:54:04,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385808864] [2023-08-31 01:54:04,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:54:04,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:54:04,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:54:04,240 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) [2023-08-31 01:54:04,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 01:54:04,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-31 01:54:04,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:54:04,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-31 01:54:04,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:54:04,680 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:54:04,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-31 01:54:04,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:54:04,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 01:54:04,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385808864] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:54:04,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 01:54:04,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2023-08-31 01:54:04,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731738139] [2023-08-31 01:54:04,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:54:04,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 01:54:04,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:54:04,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 01:54:04,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2023-08-31 01:54:04,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 327 [2023-08-31 01:54:04,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 190 flow. Second operand has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 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) [2023-08-31 01:54:04,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:54:04,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 327 [2023-08-31 01:54:04,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:54:05,282 INFO L130 PetriNetUnfolder]: 1534/2633 cut-off events. [2023-08-31 01:54:05,283 INFO L131 PetriNetUnfolder]: For 639/639 co-relation queries the response was YES. [2023-08-31 01:54:05,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6057 conditions, 2633 events. 1534/2633 cut-off events. For 639/639 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 14935 event pairs, 307 based on Foata normal form. 2/2573 useless extension candidates. Maximal degree in co-relation 6034. Up to 1421 conditions per place. [2023-08-31 01:54:05,294 INFO L137 encePairwiseOnDemand]: 320/327 looper letters, 88 selfloop transitions, 11 changer transitions 23/137 dead transitions. [2023-08-31 01:54:05,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 137 transitions, 694 flow [2023-08-31 01:54:05,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:54:05,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:54:05,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1359 transitions. [2023-08-31 01:54:05,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4617737003058104 [2023-08-31 01:54:05,298 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1359 transitions. [2023-08-31 01:54:05,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1359 transitions. [2023-08-31 01:54:05,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:54:05,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1359 transitions. [2023-08-31 01:54:05,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 151.0) internal successors, (1359), 9 states have internal predecessors, (1359), 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) [2023-08-31 01:54:05,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 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) [2023-08-31 01:54:05,305 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 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) [2023-08-31 01:54:05,305 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 190 flow. Second operand 9 states and 1359 transitions. [2023-08-31 01:54:05,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 137 transitions, 694 flow [2023-08-31 01:54:05,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 137 transitions, 690 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 01:54:05,313 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 251 flow [2023-08-31 01:54:05,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=251, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2023-08-31 01:54:05,315 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 22 predicate places. [2023-08-31 01:54:05,315 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 251 flow [2023-08-31 01:54:05,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 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) [2023-08-31 01:54:05,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:54:05,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:54:05,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-31 01:54:05,520 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 [2023-08-31 01:54:05,521 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:54:05,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:54:05,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1110793696, now seen corresponding path program 4 times [2023-08-31 01:54:05,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:54:05,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525124955] [2023-08-31 01:54:05,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:54:05,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:54:05,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:54:06,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:54:06,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:54:06,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525124955] [2023-08-31 01:54:06,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525124955] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:54:06,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055046998] [2023-08-31 01:54:06,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:54:06,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:54:06,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:54:06,201 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) [2023-08-31 01:54:06,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 01:54:06,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:54:06,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:54:06,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-31 01:54:06,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:54:06,435 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:54:06,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-31 01:54:06,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:54:06,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 01:54:06,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055046998] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:54:06,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 01:54:06,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 16 [2023-08-31 01:54:06,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739046932] [2023-08-31 01:54:06,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:54:06,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 01:54:06,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:54:06,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 01:54:06,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2023-08-31 01:54:06,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 327 [2023-08-31 01:54:06,594 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 251 flow. Second operand has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 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) [2023-08-31 01:54:06,594 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:54:06,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 327 [2023-08-31 01:54:06,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:54:07,110 INFO L130 PetriNetUnfolder]: 2114/3781 cut-off events. [2023-08-31 01:54:07,110 INFO L131 PetriNetUnfolder]: For 1863/1863 co-relation queries the response was YES. [2023-08-31 01:54:07,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9967 conditions, 3781 events. 2114/3781 cut-off events. For 1863/1863 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 24184 event pairs, 457 based on Foata normal form. 2/3712 useless extension candidates. Maximal degree in co-relation 9939. Up to 1577 conditions per place. [2023-08-31 01:54:07,125 INFO L137 encePairwiseOnDemand]: 320/327 looper letters, 124 selfloop transitions, 14 changer transitions 27/180 dead transitions. [2023-08-31 01:54:07,125 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 180 transitions, 1023 flow [2023-08-31 01:54:07,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:54:07,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:54:07,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1377 transitions. [2023-08-31 01:54:07,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46788990825688076 [2023-08-31 01:54:07,131 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1377 transitions. [2023-08-31 01:54:07,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1377 transitions. [2023-08-31 01:54:07,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:54:07,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1377 transitions. [2023-08-31 01:54:07,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 153.0) internal successors, (1377), 9 states have internal predecessors, (1377), 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) [2023-08-31 01:54:07,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 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) [2023-08-31 01:54:07,138 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 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) [2023-08-31 01:54:07,138 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 251 flow. Second operand 9 states and 1377 transitions. [2023-08-31 01:54:07,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 180 transitions, 1023 flow [2023-08-31 01:54:07,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 180 transitions, 1017 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-31 01:54:07,147 INFO L231 Difference]: Finished difference. Result has 78 places, 71 transitions, 366 flow [2023-08-31 01:54:07,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=366, PETRI_PLACES=78, PETRI_TRANSITIONS=71} [2023-08-31 01:54:07,149 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 33 predicate places. [2023-08-31 01:54:07,150 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 71 transitions, 366 flow [2023-08-31 01:54:07,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 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) [2023-08-31 01:54:07,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:54:07,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:54:07,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-31 01:54:07,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:54:07,356 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:54:07,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:54:07,356 INFO L85 PathProgramCache]: Analyzing trace with hash 2111945012, now seen corresponding path program 5 times [2023-08-31 01:54:07,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:54:07,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20572349] [2023-08-31 01:54:07,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:54:07,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:54:07,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:54:07,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:54:07,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:54:07,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20572349] [2023-08-31 01:54:07,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20572349] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:54:07,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338526995] [2023-08-31 01:54:07,871 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:54:07,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:54:07,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:54:07,872 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) [2023-08-31 01:54:07,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 01:54:07,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:54:07,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:54:07,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-31 01:54:07,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:54:08,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-31 01:54:08,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 01:54:08,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 01:54:08,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 01:54:08,255 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:54:08,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 26 [2023-08-31 01:54:08,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:54:08,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:54:08,683 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~f~0.offset (* c_~j~0 4))) (.cse3 (+ c_~f~0.offset (* c_~i~0 4)))) (and (forall ((v_ArrVal_201 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_201) c_~f~0.base))) (let ((.cse0 (select .cse1 .cse3))) (or (< .cse0 0) (<= c_~n~0 .cse0) (< c_~n~0 (+ 2 (select .cse1 (+ (* (select .cse1 .cse2) 4) c_~f~0.offset)))))))) (forall ((v_ArrVal_201 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_201) c_~f~0.base))) (let ((.cse4 (select .cse5 .cse3))) (or (< .cse4 0) (<= c_~n~0 .cse4) (< (select .cse5 (+ (* (select .cse5 .cse2) 4) c_~f~0.offset)) 1))))))) is different from false [2023-08-31 01:54:08,719 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~f~0.offset (* c_~j~0 4))) (.cse3 (+ c_~f~0.offset (* c_~i~0 4)))) (and (forall ((v_ArrVal_201 (Array Int Int)) (v_ArrVal_200 (Array Int Int))) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_201) c_~f~0.base))) (let ((.cse0 (select .cse1 .cse3))) (or (<= c_~n~0 .cse0) (< (select .cse1 (+ c_~f~0.offset (* (select .cse1 .cse2) 4))) 1) (< .cse0 0))))) (forall ((v_ArrVal_201 (Array Int Int)) (v_ArrVal_200 (Array Int Int))) (let ((.cse4 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_201) c_~f~0.base))) (let ((.cse5 (select .cse4 .cse3))) (or (< c_~n~0 (+ (select .cse4 (+ c_~f~0.offset (* (select .cse4 .cse2) 4))) 2)) (<= c_~n~0 .cse5) (< .cse5 0))))))) is different from false [2023-08-31 01:54:09,437 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:54:09,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 92 [2023-08-31 01:54:09,448 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:54:09,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 1024 treesize of output 980 [2023-08-31 01:54:09,484 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:54:09,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 548 treesize of output 432 [2023-08-31 01:54:09,510 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:54:09,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 186 treesize of output 178 [2023-08-31 01:54:09,539 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:54:09,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 219 treesize of output 175 [2023-08-31 01:54:10,211 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-31 01:54:10,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 1 [2023-08-31 01:54:10,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:54:10,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338526995] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:54:10,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:54:10,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 29 [2023-08-31 01:54:10,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155329103] [2023-08-31 01:54:10,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:54:10,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-31 01:54:10,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:54:10,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-31 01:54:10,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=643, Unknown=2, NotChecked=110, Total=930 [2023-08-31 01:54:10,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 327 [2023-08-31 01:54:10,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 71 transitions, 366 flow. Second operand has 31 states, 31 states have (on average 111.54838709677419) internal successors, (3458), 31 states have internal predecessors, (3458), 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) [2023-08-31 01:54:10,505 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:54:10,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 327 [2023-08-31 01:54:10,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:54:11,932 INFO L130 PetriNetUnfolder]: 4532/8165 cut-off events. [2023-08-31 01:54:11,933 INFO L131 PetriNetUnfolder]: For 8540/8541 co-relation queries the response was YES. [2023-08-31 01:54:11,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23985 conditions, 8165 events. 4532/8165 cut-off events. For 8540/8541 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 60776 event pairs, 1160 based on Foata normal form. 20/8042 useless extension candidates. Maximal degree in co-relation 23922. Up to 3163 conditions per place. [2023-08-31 01:54:11,962 INFO L137 encePairwiseOnDemand]: 317/327 looper letters, 58 selfloop transitions, 9 changer transitions 182/264 dead transitions. [2023-08-31 01:54:11,962 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 264 transitions, 1725 flow [2023-08-31 01:54:11,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 01:54:11,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 01:54:11,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1707 transitions. [2023-08-31 01:54:11,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.372870249017038 [2023-08-31 01:54:11,966 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1707 transitions. [2023-08-31 01:54:11,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1707 transitions. [2023-08-31 01:54:11,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:54:11,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1707 transitions. [2023-08-31 01:54:11,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 121.92857142857143) internal successors, (1707), 14 states have internal predecessors, (1707), 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) [2023-08-31 01:54:11,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 327.0) internal successors, (4905), 15 states have internal predecessors, (4905), 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) [2023-08-31 01:54:11,974 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 327.0) internal successors, (4905), 15 states have internal predecessors, (4905), 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) [2023-08-31 01:54:11,974 INFO L175 Difference]: Start difference. First operand has 78 places, 71 transitions, 366 flow. Second operand 14 states and 1707 transitions. [2023-08-31 01:54:11,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 264 transitions, 1725 flow [2023-08-31 01:54:12,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 264 transitions, 1681 flow, removed 13 selfloop flow, removed 4 redundant places. [2023-08-31 01:54:12,004 INFO L231 Difference]: Finished difference. Result has 94 places, 72 transitions, 459 flow [2023-08-31 01:54:12,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=459, PETRI_PLACES=94, PETRI_TRANSITIONS=72} [2023-08-31 01:54:12,006 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 49 predicate places. [2023-08-31 01:54:12,006 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 72 transitions, 459 flow [2023-08-31 01:54:12,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 111.54838709677419) internal successors, (3458), 31 states have internal predecessors, (3458), 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) [2023-08-31 01:54:12,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:54:12,008 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:54:12,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 01:54:12,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:54:12,213 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:54:12,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:54:12,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1199619666, now seen corresponding path program 6 times [2023-08-31 01:54:12,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:54:12,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579416864] [2023-08-31 01:54:12,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:54:12,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:54:12,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:54:12,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 01:54:12,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:54:12,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579416864] [2023-08-31 01:54:12,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579416864] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:54:12,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:54:12,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-31 01:54:12,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137563614] [2023-08-31 01:54:12,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:54:12,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 01:54:12,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:54:12,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 01:54:12,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-31 01:54:12,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 327 [2023-08-31 01:54:12,553 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 72 transitions, 459 flow. Second operand has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 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) [2023-08-31 01:54:12,554 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:54:12,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 327 [2023-08-31 01:54:12,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:54:13,085 INFO L130 PetriNetUnfolder]: 2557/4655 cut-off events. [2023-08-31 01:54:13,085 INFO L131 PetriNetUnfolder]: For 11697/11697 co-relation queries the response was YES. [2023-08-31 01:54:13,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17569 conditions, 4655 events. 2557/4655 cut-off events. For 11697/11697 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 31664 event pairs, 664 based on Foata normal form. 2/4587 useless extension candidates. Maximal degree in co-relation 17524. Up to 2174 conditions per place. [2023-08-31 01:54:13,111 INFO L137 encePairwiseOnDemand]: 320/327 looper letters, 120 selfloop transitions, 17 changer transitions 24/176 dead transitions. [2023-08-31 01:54:13,112 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 176 transitions, 1313 flow [2023-08-31 01:54:13,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:54:13,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:54:13,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1373 transitions. [2023-08-31 01:54:13,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46653075093442065 [2023-08-31 01:54:13,115 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1373 transitions. [2023-08-31 01:54:13,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1373 transitions. [2023-08-31 01:54:13,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:54:13,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1373 transitions. [2023-08-31 01:54:13,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 152.55555555555554) internal successors, (1373), 9 states have internal predecessors, (1373), 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) [2023-08-31 01:54:13,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 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) [2023-08-31 01:54:13,121 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 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) [2023-08-31 01:54:13,121 INFO L175 Difference]: Start difference. First operand has 94 places, 72 transitions, 459 flow. Second operand 9 states and 1373 transitions. [2023-08-31 01:54:13,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 176 transitions, 1313 flow [2023-08-31 01:54:13,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 176 transitions, 1210 flow, removed 46 selfloop flow, removed 5 redundant places. [2023-08-31 01:54:13,155 INFO L231 Difference]: Finished difference. Result has 94 places, 80 transitions, 564 flow [2023-08-31 01:54:13,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=564, PETRI_PLACES=94, PETRI_TRANSITIONS=80} [2023-08-31 01:54:13,155 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 49 predicate places. [2023-08-31 01:54:13,155 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 80 transitions, 564 flow [2023-08-31 01:54:13,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 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) [2023-08-31 01:54:13,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:54:13,156 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:54:13,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 01:54:13,156 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:54:13,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:54:13,157 INFO L85 PathProgramCache]: Analyzing trace with hash -675219394, now seen corresponding path program 7 times [2023-08-31 01:54:13,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:54:13,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86206242] [2023-08-31 01:54:13,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:54:13,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:54:13,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:54:13,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:54:13,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:54:13,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86206242] [2023-08-31 01:54:13,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86206242] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:54:13,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258079778] [2023-08-31 01:54:13,868 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:54:13,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:54:13,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:54:13,869 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) [2023-08-31 01:54:13,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 01:54:13,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:54:13,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-31 01:54:13,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:54:14,116 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:54:14,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-31 01:54:14,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:54:14,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:54:14,216 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-31 01:54:14,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-31 01:54:14,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 01:54:14,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258079778] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 01:54:14,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 01:54:14,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11, 7] total 19 [2023-08-31 01:54:14,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609721810] [2023-08-31 01:54:14,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:54:14,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 01:54:14,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:54:14,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 01:54:14,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2023-08-31 01:54:14,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 327 [2023-08-31 01:54:14,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 80 transitions, 564 flow. Second operand has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 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) [2023-08-31 01:54:14,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:54:14,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 327 [2023-08-31 01:54:14,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:54:15,019 INFO L130 PetriNetUnfolder]: 2528/4620 cut-off events. [2023-08-31 01:54:15,019 INFO L131 PetriNetUnfolder]: For 12525/12525 co-relation queries the response was YES. [2023-08-31 01:54:15,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17498 conditions, 4620 events. 2528/4620 cut-off events. For 12525/12525 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 31252 event pairs, 893 based on Foata normal form. 2/4546 useless extension candidates. Maximal degree in co-relation 17452. Up to 3072 conditions per place. [2023-08-31 01:54:15,046 INFO L137 encePairwiseOnDemand]: 320/327 looper letters, 97 selfloop transitions, 22 changer transitions 27/161 dead transitions. [2023-08-31 01:54:15,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 161 transitions, 1210 flow [2023-08-31 01:54:15,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:54:15,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:54:15,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1361 transitions. [2023-08-31 01:54:15,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4624532789670404 [2023-08-31 01:54:15,049 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1361 transitions. [2023-08-31 01:54:15,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1361 transitions. [2023-08-31 01:54:15,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:54:15,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1361 transitions. [2023-08-31 01:54:15,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 151.22222222222223) internal successors, (1361), 9 states have internal predecessors, (1361), 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) [2023-08-31 01:54:15,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 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) [2023-08-31 01:54:15,055 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 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) [2023-08-31 01:54:15,055 INFO L175 Difference]: Start difference. First operand has 94 places, 80 transitions, 564 flow. Second operand 9 states and 1361 transitions. [2023-08-31 01:54:15,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 161 transitions, 1210 flow [2023-08-31 01:54:15,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 161 transitions, 1161 flow, removed 18 selfloop flow, removed 5 redundant places. [2023-08-31 01:54:15,090 INFO L231 Difference]: Finished difference. Result has 99 places, 84 transitions, 634 flow [2023-08-31 01:54:15,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=634, PETRI_PLACES=99, PETRI_TRANSITIONS=84} [2023-08-31 01:54:15,090 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 54 predicate places. [2023-08-31 01:54:15,090 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 84 transitions, 634 flow [2023-08-31 01:54:15,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 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) [2023-08-31 01:54:15,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:54:15,091 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:54:15,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 01:54:15,296 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 [2023-08-31 01:54:15,297 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:54:15,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:54:15,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1951083324, now seen corresponding path program 8 times [2023-08-31 01:54:15,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:54:15,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447072569] [2023-08-31 01:54:15,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:54:15,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:54:15,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:54:15,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 01:54:15,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:54:15,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447072569] [2023-08-31 01:54:15,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447072569] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:54:15,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:54:15,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-31 01:54:15,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129289179] [2023-08-31 01:54:15,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:54:15,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 01:54:15,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:54:15,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 01:54:15,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-31 01:54:15,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 327 [2023-08-31 01:54:15,475 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 84 transitions, 634 flow. Second operand has 7 states, 7 states have (on average 146.28571428571428) internal successors, (1024), 7 states have internal predecessors, (1024), 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) [2023-08-31 01:54:15,476 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:54:15,476 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 327 [2023-08-31 01:54:15,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:54:16,310 INFO L130 PetriNetUnfolder]: 3793/7238 cut-off events. [2023-08-31 01:54:16,310 INFO L131 PetriNetUnfolder]: For 22384/22543 co-relation queries the response was YES. [2023-08-31 01:54:16,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26982 conditions, 7238 events. 3793/7238 cut-off events. For 22384/22543 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 53663 event pairs, 1423 based on Foata normal form. 42/7238 useless extension candidates. Maximal degree in co-relation 26936. Up to 4461 conditions per place. [2023-08-31 01:54:16,350 INFO L137 encePairwiseOnDemand]: 319/327 looper letters, 203 selfloop transitions, 18 changer transitions 10/241 dead transitions. [2023-08-31 01:54:16,351 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 241 transitions, 2321 flow [2023-08-31 01:54:16,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 01:54:16,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 01:54:16,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1689 transitions. [2023-08-31 01:54:16,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.469557964970809 [2023-08-31 01:54:16,354 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1689 transitions. [2023-08-31 01:54:16,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1689 transitions. [2023-08-31 01:54:16,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:54:16,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1689 transitions. [2023-08-31 01:54:16,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 153.54545454545453) internal successors, (1689), 11 states have internal predecessors, (1689), 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) [2023-08-31 01:54:16,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 327.0) internal successors, (3924), 12 states have internal predecessors, (3924), 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) [2023-08-31 01:54:16,361 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 327.0) internal successors, (3924), 12 states have internal predecessors, (3924), 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) [2023-08-31 01:54:16,361 INFO L175 Difference]: Start difference. First operand has 99 places, 84 transitions, 634 flow. Second operand 11 states and 1689 transitions. [2023-08-31 01:54:16,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 241 transitions, 2321 flow [2023-08-31 01:54:16,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 241 transitions, 2174 flow, removed 47 selfloop flow, removed 4 redundant places. [2023-08-31 01:54:16,429 INFO L231 Difference]: Finished difference. Result has 108 places, 99 transitions, 736 flow [2023-08-31 01:54:16,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=736, PETRI_PLACES=108, PETRI_TRANSITIONS=99} [2023-08-31 01:54:16,430 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 63 predicate places. [2023-08-31 01:54:16,430 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 99 transitions, 736 flow [2023-08-31 01:54:16,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.28571428571428) internal successors, (1024), 7 states have internal predecessors, (1024), 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) [2023-08-31 01:54:16,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:54:16,440 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:54:16,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 01:54:16,441 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:54:16,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:54:16,441 INFO L85 PathProgramCache]: Analyzing trace with hash 174753486, now seen corresponding path program 9 times [2023-08-31 01:54:16,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:54:16,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007990584] [2023-08-31 01:54:16,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:54:16,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:54:16,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:54:17,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:54:17,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:54:17,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007990584] [2023-08-31 01:54:17,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007990584] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:54:17,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763907655] [2023-08-31 01:54:17,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:54:17,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:54:17,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:54:17,042 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) [2023-08-31 01:54:17,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 01:54:17,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-31 01:54:17,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:54:17,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-31 01:54:17,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:54:17,262 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:54:17,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-31 01:54:17,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 01:54:17,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 01:54:17,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763907655] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:54:17,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 01:54:17,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 17 [2023-08-31 01:54:17,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104988865] [2023-08-31 01:54:17,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:54:17,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 01:54:17,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:54:17,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 01:54:17,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2023-08-31 01:54:19,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-31 01:54:21,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-31 01:54:23,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-31 01:54:25,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-31 01:54:25,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 327 [2023-08-31 01:54:25,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 99 transitions, 736 flow. Second operand has 8 states, 8 states have (on average 141.5) internal successors, (1132), 8 states have internal predecessors, (1132), 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) [2023-08-31 01:54:25,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:54:25,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 327 [2023-08-31 01:54:25,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:54:26,541 INFO L130 PetriNetUnfolder]: 4648/8535 cut-off events. [2023-08-31 01:54:26,541 INFO L131 PetriNetUnfolder]: For 27575/27591 co-relation queries the response was YES. [2023-08-31 01:54:26,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33519 conditions, 8535 events. 4648/8535 cut-off events. For 27575/27591 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 64893 event pairs, 1031 based on Foata normal form. 20/8468 useless extension candidates. Maximal degree in co-relation 33469. Up to 4923 conditions per place. [2023-08-31 01:54:26,588 INFO L137 encePairwiseOnDemand]: 318/327 looper letters, 156 selfloop transitions, 20 changer transitions 32/232 dead transitions. [2023-08-31 01:54:26,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 232 transitions, 1912 flow [2023-08-31 01:54:26,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:54:26,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:54:26,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1360 transitions. [2023-08-31 01:54:26,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621134896364254 [2023-08-31 01:54:26,592 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1360 transitions. [2023-08-31 01:54:26,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1360 transitions. [2023-08-31 01:54:26,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:54:26,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1360 transitions. [2023-08-31 01:54:26,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 151.11111111111111) internal successors, (1360), 9 states have internal predecessors, (1360), 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) [2023-08-31 01:54:26,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 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) [2023-08-31 01:54:26,597 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 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) [2023-08-31 01:54:26,597 INFO L175 Difference]: Start difference. First operand has 108 places, 99 transitions, 736 flow. Second operand 9 states and 1360 transitions. [2023-08-31 01:54:26,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 232 transitions, 1912 flow [2023-08-31 01:54:26,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 232 transitions, 1908 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-31 01:54:26,697 INFO L231 Difference]: Finished difference. Result has 120 places, 107 transitions, 891 flow [2023-08-31 01:54:26,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=891, PETRI_PLACES=120, PETRI_TRANSITIONS=107} [2023-08-31 01:54:26,698 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 75 predicate places. [2023-08-31 01:54:26,699 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 107 transitions, 891 flow [2023-08-31 01:54:26,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 141.5) internal successors, (1132), 8 states have internal predecessors, (1132), 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) [2023-08-31 01:54:26,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:54:26,699 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:54:26,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-31 01:54:26,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-31 01:54:26,905 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:54:26,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:54:26,905 INFO L85 PathProgramCache]: Analyzing trace with hash 951031568, now seen corresponding path program 10 times [2023-08-31 01:54:26,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:54:26,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566096558] [2023-08-31 01:54:26,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:54:26,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:54:26,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:54:27,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:54:27,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:54:27,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566096558] [2023-08-31 01:54:27,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566096558] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:54:27,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735744422] [2023-08-31 01:54:27,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:54:27,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:54:27,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:54:27,431 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) [2023-08-31 01:54:27,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 01:54:27,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:54:27,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:54:27,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-31 01:54:27,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:54:27,583 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:54:27,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-31 01:54:27,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 01:54:27,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 01:54:27,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735744422] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:54:27,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 01:54:27,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2023-08-31 01:54:27,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400769124] [2023-08-31 01:54:27,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:54:27,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 01:54:27,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:54:27,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 01:54:27,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2023-08-31 01:54:27,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 327 [2023-08-31 01:54:27,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 107 transitions, 891 flow. Second operand has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 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) [2023-08-31 01:54:27,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:54:27,668 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 327 [2023-08-31 01:54:27,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:54:28,571 INFO L130 PetriNetUnfolder]: 4831/8901 cut-off events. [2023-08-31 01:54:28,571 INFO L131 PetriNetUnfolder]: For 37081/37097 co-relation queries the response was YES. [2023-08-31 01:54:28,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37681 conditions, 8901 events. 4831/8901 cut-off events. For 37081/37097 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 68199 event pairs, 1153 based on Foata normal form. 20/8834 useless extension candidates. Maximal degree in co-relation 37626. Up to 5467 conditions per place. [2023-08-31 01:54:28,625 INFO L137 encePairwiseOnDemand]: 318/327 looper letters, 181 selfloop transitions, 23 changer transitions 21/249 dead transitions. [2023-08-31 01:54:28,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 249 transitions, 2142 flow [2023-08-31 01:54:28,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 01:54:28,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 01:54:28,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1530 transitions. [2023-08-31 01:54:28,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46788990825688076 [2023-08-31 01:54:28,628 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1530 transitions. [2023-08-31 01:54:28,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1530 transitions. [2023-08-31 01:54:28,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:54:28,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1530 transitions. [2023-08-31 01:54:28,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 153.0) internal successors, (1530), 10 states have internal predecessors, (1530), 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) [2023-08-31 01:54:28,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 327.0) internal successors, (3597), 11 states have internal predecessors, (3597), 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) [2023-08-31 01:54:28,633 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 327.0) internal successors, (3597), 11 states have internal predecessors, (3597), 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) [2023-08-31 01:54:28,634 INFO L175 Difference]: Start difference. First operand has 120 places, 107 transitions, 891 flow. Second operand 10 states and 1530 transitions. [2023-08-31 01:54:28,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 249 transitions, 2142 flow [2023-08-31 01:54:28,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 249 transitions, 2067 flow, removed 22 selfloop flow, removed 6 redundant places. [2023-08-31 01:54:28,789 INFO L231 Difference]: Finished difference. Result has 124 places, 111 transitions, 932 flow [2023-08-31 01:54:28,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=932, PETRI_PLACES=124, PETRI_TRANSITIONS=111} [2023-08-31 01:54:28,790 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 79 predicate places. [2023-08-31 01:54:28,790 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 111 transitions, 932 flow [2023-08-31 01:54:28,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 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) [2023-08-31 01:54:28,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:54:28,791 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:54:28,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 01:54:28,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:54:28,995 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:54:28,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:54:28,995 INFO L85 PathProgramCache]: Analyzing trace with hash 714877538, now seen corresponding path program 11 times [2023-08-31 01:54:28,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:54:28,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018243696] [2023-08-31 01:54:28,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:54:28,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:54:29,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:54:29,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:54:29,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:54:29,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018243696] [2023-08-31 01:54:29,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018243696] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:54:29,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616182932] [2023-08-31 01:54:29,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:54:29,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:54:29,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:54:29,598 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) [2023-08-31 01:54:29,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 01:54:29,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:54:29,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:54:29,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-31 01:54:29,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:54:29,773 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:54:29,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-31 01:54:29,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:54:29,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:54:29,855 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-31 01:54:29,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-31 01:54:29,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 01:54:29,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616182932] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 01:54:29,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 01:54:29,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11, 7] total 19 [2023-08-31 01:54:29,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801438022] [2023-08-31 01:54:29,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:54:29,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 01:54:29,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:54:29,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 01:54:29,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2023-08-31 01:54:29,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 327 [2023-08-31 01:54:29,976 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 111 transitions, 932 flow. Second operand has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 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) [2023-08-31 01:54:29,976 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:54:29,976 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 327 [2023-08-31 01:54:29,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:54:30,878 INFO L130 PetriNetUnfolder]: 4724/8678 cut-off events. [2023-08-31 01:54:30,878 INFO L131 PetriNetUnfolder]: For 34386/34402 co-relation queries the response was YES. [2023-08-31 01:54:30,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37150 conditions, 8678 events. 4724/8678 cut-off events. For 34386/34402 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 66062 event pairs, 1181 based on Foata normal form. 20/8611 useless extension candidates. Maximal degree in co-relation 37094. Up to 5467 conditions per place. [2023-08-31 01:54:30,949 INFO L137 encePairwiseOnDemand]: 318/327 looper letters, 151 selfloop transitions, 21 changer transitions 30/226 dead transitions. [2023-08-31 01:54:30,950 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 226 transitions, 1964 flow [2023-08-31 01:54:30,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 01:54:30,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 01:54:30,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1236 transitions. [2023-08-31 01:54:30,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4724770642201835 [2023-08-31 01:54:30,952 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1236 transitions. [2023-08-31 01:54:30,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1236 transitions. [2023-08-31 01:54:30,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:54:30,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1236 transitions. [2023-08-31 01:54:30,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 154.5) internal successors, (1236), 8 states have internal predecessors, (1236), 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) [2023-08-31 01:54:30,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 327.0) internal successors, (2943), 9 states have internal predecessors, (2943), 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) [2023-08-31 01:54:30,957 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 327.0) internal successors, (2943), 9 states have internal predecessors, (2943), 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) [2023-08-31 01:54:30,957 INFO L175 Difference]: Start difference. First operand has 124 places, 111 transitions, 932 flow. Second operand 8 states and 1236 transitions. [2023-08-31 01:54:30,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 226 transitions, 1964 flow [2023-08-31 01:54:31,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 226 transitions, 1901 flow, removed 11 selfloop flow, removed 6 redundant places. [2023-08-31 01:54:31,119 INFO L231 Difference]: Finished difference. Result has 125 places, 109 transitions, 893 flow [2023-08-31 01:54:31,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=893, PETRI_PLACES=125, PETRI_TRANSITIONS=109} [2023-08-31 01:54:31,119 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 80 predicate places. [2023-08-31 01:54:31,120 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 109 transitions, 893 flow [2023-08-31 01:54:31,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 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) [2023-08-31 01:54:31,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:54:31,120 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:54:31,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 01:54:31,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:54:31,325 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:54:31,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:54:31,326 INFO L85 PathProgramCache]: Analyzing trace with hash 681336652, now seen corresponding path program 12 times [2023-08-31 01:54:31,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:54:31,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642141796] [2023-08-31 01:54:31,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:54:31,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:54:31,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:54:31,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:54:31,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:54:31,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642141796] [2023-08-31 01:54:31,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642141796] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:54:31,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841330356] [2023-08-31 01:54:31,895 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:54:31,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:54:31,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:54:31,909 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:54:31,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 01:54:31,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-31 01:54:32,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:54:32,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-31 01:54:32,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:54:32,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:54:32,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 01:54:32,189 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:54:32,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-31 01:54:32,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 01:54:32,196 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 01:54:32,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841330356] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:54:32,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 01:54:32,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2023-08-31 01:54:32,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398575398] [2023-08-31 01:54:32,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:54:32,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 01:54:32,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:54:32,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 01:54:32,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2023-08-31 01:54:32,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 327 [2023-08-31 01:54:32,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 109 transitions, 893 flow. Second operand has 10 states, 10 states have (on average 137.8) internal successors, (1378), 10 states have internal predecessors, (1378), 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) [2023-08-31 01:54:32,405 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:54:32,405 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 327 [2023-08-31 01:54:32,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:54:33,493 INFO L130 PetriNetUnfolder]: 4803/8956 cut-off events. [2023-08-31 01:54:33,494 INFO L131 PetriNetUnfolder]: For 34519/34533 co-relation queries the response was YES. [2023-08-31 01:54:33,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37726 conditions, 8956 events. 4803/8956 cut-off events. For 34519/34533 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 69574 event pairs, 1251 based on Foata normal form. 18/8877 useless extension candidates. Maximal degree in co-relation 37670. Up to 4569 conditions per place. [2023-08-31 01:54:33,568 INFO L137 encePairwiseOnDemand]: 318/327 looper letters, 154 selfloop transitions, 24 changer transitions 34/236 dead transitions. [2023-08-31 01:54:33,568 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 236 transitions, 2077 flow [2023-08-31 01:54:33,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 01:54:33,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 01:54:33,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1468 transitions. [2023-08-31 01:54:33,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489296636085627 [2023-08-31 01:54:33,570 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1468 transitions. [2023-08-31 01:54:33,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1468 transitions. [2023-08-31 01:54:33,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:54:33,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1468 transitions. [2023-08-31 01:54:33,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 146.8) internal successors, (1468), 10 states have internal predecessors, (1468), 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) [2023-08-31 01:54:33,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 327.0) internal successors, (3597), 11 states have internal predecessors, (3597), 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) [2023-08-31 01:54:33,575 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 327.0) internal successors, (3597), 11 states have internal predecessors, (3597), 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) [2023-08-31 01:54:33,575 INFO L175 Difference]: Start difference. First operand has 125 places, 109 transitions, 893 flow. Second operand 10 states and 1468 transitions. [2023-08-31 01:54:33,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 236 transitions, 2077 flow [2023-08-31 01:54:33,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 236 transitions, 2014 flow, removed 6 selfloop flow, removed 8 redundant places. [2023-08-31 01:54:33,777 INFO L231 Difference]: Finished difference. Result has 129 places, 113 transitions, 976 flow [2023-08-31 01:54:33,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=842, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=976, PETRI_PLACES=129, PETRI_TRANSITIONS=113} [2023-08-31 01:54:33,778 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 84 predicate places. [2023-08-31 01:54:33,783 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 113 transitions, 976 flow [2023-08-31 01:54:33,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 137.8) internal successors, (1378), 10 states have internal predecessors, (1378), 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) [2023-08-31 01:54:33,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:54:33,784 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:54:33,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-31 01:54:33,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-31 01:54:33,988 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:54:33,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:54:33,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1805207680, now seen corresponding path program 13 times [2023-08-31 01:54:33,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:54:33,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564101014] [2023-08-31 01:54:33,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:54:33,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:54:34,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:54:34,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:54:34,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:54:34,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564101014] [2023-08-31 01:54:34,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564101014] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:54:34,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913805883] [2023-08-31 01:54:34,673 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:54:34,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:54:34,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:54:34,674 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:54:34,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 01:54:34,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:54:34,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-31 01:54:34,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:54:34,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:54:34,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-31 01:54:35,111 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:54:35,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 28 [2023-08-31 01:54:35,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:54:35,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:54:35,313 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:54:35,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 154 treesize of output 162 [2023-08-31 01:54:35,331 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:54:35,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 62 [2023-08-31 01:54:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:54:36,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913805883] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:54:36,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:54:36,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-08-31 01:54:36,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897440883] [2023-08-31 01:54:36,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:54:36,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-31 01:54:36,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:54:36,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-31 01:54:36,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=935, Unknown=1, NotChecked=0, Total=1056 [2023-08-31 01:54:38,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:54:40,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:54:42,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:54:42,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 327 [2023-08-31 01:54:42,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 113 transitions, 976 flow. Second operand has 33 states, 33 states have (on average 115.0909090909091) internal successors, (3798), 33 states have internal predecessors, (3798), 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) [2023-08-31 01:54:42,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:54:42,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 327 [2023-08-31 01:54:42,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:54:53,908 WARN L222 SmtUtils]: Spent 10.27s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 01:55:03,233 WARN L222 SmtUtils]: Spent 8.16s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 01:55:06,474 INFO L130 PetriNetUnfolder]: 15545/28943 cut-off events. [2023-08-31 01:55:06,474 INFO L131 PetriNetUnfolder]: For 131042/131099 co-relation queries the response was YES. [2023-08-31 01:55:06,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124873 conditions, 28943 events. 15545/28943 cut-off events. For 131042/131099 co-relation queries the response was YES. Maximal size of possible extension queue 1325. Compared 266867 event pairs, 4624 based on Foata normal form. 57/28724 useless extension candidates. Maximal degree in co-relation 124334. Up to 8007 conditions per place. [2023-08-31 01:55:06,650 INFO L137 encePairwiseOnDemand]: 314/327 looper letters, 534 selfloop transitions, 103 changer transitions 65/726 dead transitions. [2023-08-31 01:55:06,650 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 726 transitions, 6762 flow [2023-08-31 01:55:06,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-31 01:55:06,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-31 01:55:06,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 4237 transitions. [2023-08-31 01:55:06,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3810937218924267 [2023-08-31 01:55:06,655 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 4237 transitions. [2023-08-31 01:55:06,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 4237 transitions. [2023-08-31 01:55:06,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:55:06,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 4237 transitions. [2023-08-31 01:55:06,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 124.61764705882354) internal successors, (4237), 34 states have internal predecessors, (4237), 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) [2023-08-31 01:55:06,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 327.0) internal successors, (11445), 35 states have internal predecessors, (11445), 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) [2023-08-31 01:55:06,706 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 327.0) internal successors, (11445), 35 states have internal predecessors, (11445), 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) [2023-08-31 01:55:06,706 INFO L175 Difference]: Start difference. First operand has 129 places, 113 transitions, 976 flow. Second operand 34 states and 4237 transitions. [2023-08-31 01:55:06,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 726 transitions, 6762 flow [2023-08-31 01:55:08,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 726 transitions, 6457 flow, removed 114 selfloop flow, removed 6 redundant places. [2023-08-31 01:55:08,394 INFO L231 Difference]: Finished difference. Result has 168 places, 205 transitions, 2321 flow [2023-08-31 01:55:08,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2321, PETRI_PLACES=168, PETRI_TRANSITIONS=205} [2023-08-31 01:55:08,394 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 123 predicate places. [2023-08-31 01:55:08,395 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 205 transitions, 2321 flow [2023-08-31 01:55:08,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 115.0909090909091) internal successors, (3798), 33 states have internal predecessors, (3798), 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) [2023-08-31 01:55:08,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:55:08,409 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:55:08,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-31 01:55:08,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-31 01:55:08,613 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:55:08,614 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:55:08,614 INFO L85 PathProgramCache]: Analyzing trace with hash -758409070, now seen corresponding path program 14 times [2023-08-31 01:55:08,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:55:08,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477290157] [2023-08-31 01:55:08,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:55:08,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:55:08,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:55:09,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:55:09,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:55:09,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477290157] [2023-08-31 01:55:09,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477290157] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:55:09,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315886927] [2023-08-31 01:55:09,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:55:09,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:55:09,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:55:09,144 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:55:09,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 01:55:09,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-31 01:55:09,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:55:09,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-31 01:55:09,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:55:09,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:55:09,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 01:55:09,412 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:55:09,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-31 01:55:09,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 01:55:09,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 01:55:09,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315886927] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:55:09,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 01:55:09,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2023-08-31 01:55:09,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982393313] [2023-08-31 01:55:09,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:55:09,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 01:55:09,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:55:09,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 01:55:09,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2023-08-31 01:55:09,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 327 [2023-08-31 01:55:09,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 205 transitions, 2321 flow. Second operand has 10 states, 10 states have (on average 137.8) internal successors, (1378), 10 states have internal predecessors, (1378), 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) [2023-08-31 01:55:09,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:55:09,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 327 [2023-08-31 01:55:09,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:55:13,678 INFO L130 PetriNetUnfolder]: 15417/28740 cut-off events. [2023-08-31 01:55:13,678 INFO L131 PetriNetUnfolder]: For 178692/178737 co-relation queries the response was YES. [2023-08-31 01:55:14,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140701 conditions, 28740 events. 15417/28740 cut-off events. For 178692/178737 co-relation queries the response was YES. Maximal size of possible extension queue 1324. Compared 265198 event pairs, 4092 based on Foata normal form. 65/28510 useless extension candidates. Maximal degree in co-relation 139880. Up to 16233 conditions per place. [2023-08-31 01:55:14,119 INFO L137 encePairwiseOnDemand]: 318/327 looper letters, 155 selfloop transitions, 79 changer transitions 72/330 dead transitions. [2023-08-31 01:55:14,120 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 330 transitions, 3807 flow [2023-08-31 01:55:14,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:55:14,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:55:14,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1332 transitions. [2023-08-31 01:55:14,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4525993883792049 [2023-08-31 01:55:14,122 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1332 transitions. [2023-08-31 01:55:14,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1332 transitions. [2023-08-31 01:55:14,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:55:14,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1332 transitions. [2023-08-31 01:55:14,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 148.0) internal successors, (1332), 9 states have internal predecessors, (1332), 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) [2023-08-31 01:55:14,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 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) [2023-08-31 01:55:14,126 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 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) [2023-08-31 01:55:14,127 INFO L175 Difference]: Start difference. First operand has 168 places, 205 transitions, 2321 flow. Second operand 9 states and 1332 transitions. [2023-08-31 01:55:14,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 330 transitions, 3807 flow [2023-08-31 01:55:16,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 330 transitions, 3551 flow, removed 107 selfloop flow, removed 11 redundant places. [2023-08-31 01:55:16,321 INFO L231 Difference]: Finished difference. Result has 164 places, 182 transitions, 2083 flow [2023-08-31 01:55:16,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=2083, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2083, PETRI_PLACES=164, PETRI_TRANSITIONS=182} [2023-08-31 01:55:16,322 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 119 predicate places. [2023-08-31 01:55:16,322 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 182 transitions, 2083 flow [2023-08-31 01:55:16,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 137.8) internal successors, (1378), 10 states have internal predecessors, (1378), 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) [2023-08-31 01:55:16,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:55:16,323 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:55:16,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-31 01:55:16,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-31 01:55:16,527 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:55:16,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:55:16,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1341670056, now seen corresponding path program 15 times [2023-08-31 01:55:16,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:55:16,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124899851] [2023-08-31 01:55:16,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:55:16,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:55:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:55:16,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 01:55:16,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:55:16,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124899851] [2023-08-31 01:55:16,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124899851] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:55:16,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:55:16,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-31 01:55:16,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374979389] [2023-08-31 01:55:16,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:55:16,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 01:55:16,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:55:16,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 01:55:16,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-31 01:55:16,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 327 [2023-08-31 01:55:16,679 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 182 transitions, 2083 flow. Second operand has 7 states, 7 states have (on average 146.28571428571428) internal successors, (1024), 7 states have internal predecessors, (1024), 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) [2023-08-31 01:55:16,679 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:55:16,679 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 327 [2023-08-31 01:55:16,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:55:19,966 INFO L130 PetriNetUnfolder]: 14278/27888 cut-off events. [2023-08-31 01:55:19,966 INFO L131 PetriNetUnfolder]: For 191083/191504 co-relation queries the response was YES. [2023-08-31 01:55:20,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133526 conditions, 27888 events. 14278/27888 cut-off events. For 191083/191504 co-relation queries the response was YES. Maximal size of possible extension queue 1172. Compared 262721 event pairs, 6690 based on Foata normal form. 170/27921 useless extension candidates. Maximal degree in co-relation 133476. Up to 18583 conditions per place. [2023-08-31 01:55:20,154 INFO L137 encePairwiseOnDemand]: 319/327 looper letters, 356 selfloop transitions, 18 changer transitions 21/411 dead transitions. [2023-08-31 01:55:20,154 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 411 transitions, 5793 flow [2023-08-31 01:55:20,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:55:20,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:55:20,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1386 transitions. [2023-08-31 01:55:20,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4709480122324159 [2023-08-31 01:55:20,156 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1386 transitions. [2023-08-31 01:55:20,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1386 transitions. [2023-08-31 01:55:20,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:55:20,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1386 transitions. [2023-08-31 01:55:20,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 154.0) internal successors, (1386), 9 states have internal predecessors, (1386), 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) [2023-08-31 01:55:20,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 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) [2023-08-31 01:55:20,160 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 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) [2023-08-31 01:55:20,160 INFO L175 Difference]: Start difference. First operand has 164 places, 182 transitions, 2083 flow. Second operand 9 states and 1386 transitions. [2023-08-31 01:55:20,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 411 transitions, 5793 flow [2023-08-31 01:55:22,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 411 transitions, 5293 flow, removed 37 selfloop flow, removed 9 redundant places. [2023-08-31 01:55:22,037 INFO L231 Difference]: Finished difference. Result has 157 places, 187 transitions, 1983 flow [2023-08-31 01:55:22,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1884, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1983, PETRI_PLACES=157, PETRI_TRANSITIONS=187} [2023-08-31 01:55:22,038 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 112 predicate places. [2023-08-31 01:55:22,038 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 187 transitions, 1983 flow [2023-08-31 01:55:22,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.28571428571428) internal successors, (1024), 7 states have internal predecessors, (1024), 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) [2023-08-31 01:55:22,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:55:22,038 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:55:22,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-31 01:55:22,039 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:55:22,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:55:22,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1576014398, now seen corresponding path program 16 times [2023-08-31 01:55:22,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:55:22,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537778923] [2023-08-31 01:55:22,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:55:22,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:55:22,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:55:22,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 01:55:22,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:55:22,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537778923] [2023-08-31 01:55:22,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537778923] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:55:22,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:55:22,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 01:55:22,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304707904] [2023-08-31 01:55:22,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:55:22,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 01:55:22,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:55:22,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 01:55:22,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 01:55:22,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 327 [2023-08-31 01:55:22,124 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 187 transitions, 1983 flow. Second operand has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 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) [2023-08-31 01:55:22,124 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:55:22,124 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 327 [2023-08-31 01:55:22,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:55:25,175 INFO L130 PetriNetUnfolder]: 12896/25846 cut-off events. [2023-08-31 01:55:25,175 INFO L131 PetriNetUnfolder]: For 151367/151849 co-relation queries the response was YES. [2023-08-31 01:55:25,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118725 conditions, 25846 events. 12896/25846 cut-off events. For 151367/151849 co-relation queries the response was YES. Maximal size of possible extension queue 1126. Compared 246245 event pairs, 10771 based on Foata normal form. 176/25737 useless extension candidates. Maximal degree in co-relation 118672. Up to 23501 conditions per place. [2023-08-31 01:55:25,353 INFO L137 encePairwiseOnDemand]: 324/327 looper letters, 166 selfloop transitions, 2 changer transitions 7/211 dead transitions. [2023-08-31 01:55:25,353 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 211 transitions, 2563 flow [2023-08-31 01:55:25,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 01:55:25,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 01:55:25,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 495 transitions. [2023-08-31 01:55:25,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5045871559633027 [2023-08-31 01:55:25,354 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 495 transitions. [2023-08-31 01:55:25,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 495 transitions. [2023-08-31 01:55:25,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:55:25,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 495 transitions. [2023-08-31 01:55:25,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 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) [2023-08-31 01:55:25,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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) [2023-08-31 01:55:25,356 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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) [2023-08-31 01:55:25,357 INFO L175 Difference]: Start difference. First operand has 157 places, 187 transitions, 1983 flow. Second operand 3 states and 495 transitions. [2023-08-31 01:55:25,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 211 transitions, 2563 flow [2023-08-31 01:55:26,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 211 transitions, 2546 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-31 01:55:26,866 INFO L231 Difference]: Finished difference. Result has 158 places, 184 transitions, 1939 flow [2023-08-31 01:55:26,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1931, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1939, PETRI_PLACES=158, PETRI_TRANSITIONS=184} [2023-08-31 01:55:26,866 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 113 predicate places. [2023-08-31 01:55:26,866 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 184 transitions, 1939 flow [2023-08-31 01:55:26,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 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) [2023-08-31 01:55:26,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:55:26,867 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:55:26,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-31 01:55:26,867 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:55:26,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:55:26,868 INFO L85 PathProgramCache]: Analyzing trace with hash -88521762, now seen corresponding path program 17 times [2023-08-31 01:55:26,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:55:26,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801952880] [2023-08-31 01:55:26,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:55:26,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:55:26,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:55:27,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 01:55:27,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:55:27,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801952880] [2023-08-31 01:55:27,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801952880] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:55:27,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:55:27,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-31 01:55:27,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732231535] [2023-08-31 01:55:27,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:55:27,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 01:55:27,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:55:27,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 01:55:27,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-31 01:55:27,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 327 [2023-08-31 01:55:27,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 184 transitions, 1939 flow. Second operand has 7 states, 7 states have (on average 146.28571428571428) internal successors, (1024), 7 states have internal predecessors, (1024), 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) [2023-08-31 01:55:27,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:55:27,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 327 [2023-08-31 01:55:27,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:55:29,271 INFO L130 PetriNetUnfolder]: 10344/20384 cut-off events. [2023-08-31 01:55:29,271 INFO L131 PetriNetUnfolder]: For 111205/111449 co-relation queries the response was YES. [2023-08-31 01:55:29,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92303 conditions, 20384 events. 10344/20384 cut-off events. For 111205/111449 co-relation queries the response was YES. Maximal size of possible extension queue 837. Compared 183955 event pairs, 5404 based on Foata normal form. 158/20423 useless extension candidates. Maximal degree in co-relation 92250. Up to 17628 conditions per place. [2023-08-31 01:55:29,391 INFO L137 encePairwiseOnDemand]: 319/327 looper letters, 212 selfloop transitions, 16 changer transitions 40/284 dead transitions. [2023-08-31 01:55:29,391 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 284 transitions, 3269 flow [2023-08-31 01:55:29,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 01:55:29,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 01:55:29,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1523 transitions. [2023-08-31 01:55:29,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4657492354740061 [2023-08-31 01:55:29,393 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1523 transitions. [2023-08-31 01:55:29,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1523 transitions. [2023-08-31 01:55:29,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:55:29,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1523 transitions. [2023-08-31 01:55:29,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 152.3) internal successors, (1523), 10 states have internal predecessors, (1523), 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) [2023-08-31 01:55:29,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 327.0) internal successors, (3597), 11 states have internal predecessors, (3597), 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) [2023-08-31 01:55:29,397 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 327.0) internal successors, (3597), 11 states have internal predecessors, (3597), 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) [2023-08-31 01:55:29,397 INFO L175 Difference]: Start difference. First operand has 158 places, 184 transitions, 1939 flow. Second operand 10 states and 1523 transitions. [2023-08-31 01:55:29,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 284 transitions, 3269 flow [2023-08-31 01:55:30,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 284 transitions, 3262 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-31 01:55:30,329 INFO L231 Difference]: Finished difference. Result has 165 places, 182 transitions, 1949 flow [2023-08-31 01:55:30,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1913, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1949, PETRI_PLACES=165, PETRI_TRANSITIONS=182} [2023-08-31 01:55:30,329 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 120 predicate places. [2023-08-31 01:55:30,330 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 182 transitions, 1949 flow [2023-08-31 01:55:30,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.28571428571428) internal successors, (1024), 7 states have internal predecessors, (1024), 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) [2023-08-31 01:55:30,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:55:30,330 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:55:30,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-31 01:55:30,330 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:55:30,331 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:55:30,331 INFO L85 PathProgramCache]: Analyzing trace with hash 2056628482, now seen corresponding path program 18 times [2023-08-31 01:55:30,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:55:30,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046531283] [2023-08-31 01:55:30,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:55:30,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:55:30,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:55:30,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 01:55:30,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:55:30,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046531283] [2023-08-31 01:55:30,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046531283] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:55:30,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:55:30,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-31 01:55:30,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285428309] [2023-08-31 01:55:30,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:55:30,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 01:55:30,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:55:30,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 01:55:30,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-31 01:55:30,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 327 [2023-08-31 01:55:30,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 182 transitions, 1949 flow. Second operand has 7 states, 7 states have (on average 146.28571428571428) internal successors, (1024), 7 states have internal predecessors, (1024), 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) [2023-08-31 01:55:30,434 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:55:30,434 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 327 [2023-08-31 01:55:30,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:55:32,458 INFO L130 PetriNetUnfolder]: 7798/15997 cut-off events. [2023-08-31 01:55:32,459 INFO L131 PetriNetUnfolder]: For 87923/88078 co-relation queries the response was YES. [2023-08-31 01:55:32,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71014 conditions, 15997 events. 7798/15997 cut-off events. For 87923/88078 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 144512 event pairs, 2279 based on Foata normal form. 150/16099 useless extension candidates. Maximal degree in co-relation 70961. Up to 4514 conditions per place. [2023-08-31 01:55:32,541 INFO L137 encePairwiseOnDemand]: 319/327 looper letters, 305 selfloop transitions, 36 changer transitions 35/392 dead transitions. [2023-08-31 01:55:32,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 392 transitions, 5125 flow [2023-08-31 01:55:32,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:55:32,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:55:32,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1387 transitions. [2023-08-31 01:55:32,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4712878015630309 [2023-08-31 01:55:32,543 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1387 transitions. [2023-08-31 01:55:32,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1387 transitions. [2023-08-31 01:55:32,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:55:32,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1387 transitions. [2023-08-31 01:55:32,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 154.11111111111111) internal successors, (1387), 9 states have internal predecessors, (1387), 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) [2023-08-31 01:55:32,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 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) [2023-08-31 01:55:32,546 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 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) [2023-08-31 01:55:32,546 INFO L175 Difference]: Start difference. First operand has 165 places, 182 transitions, 1949 flow. Second operand 9 states and 1387 transitions. [2023-08-31 01:55:32,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 392 transitions, 5125 flow [2023-08-31 01:55:32,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 392 transitions, 5080 flow, removed 1 selfloop flow, removed 10 redundant places. [2023-08-31 01:55:32,955 INFO L231 Difference]: Finished difference. Result has 166 places, 187 transitions, 2058 flow [2023-08-31 01:55:32,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1900, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2058, PETRI_PLACES=166, PETRI_TRANSITIONS=187} [2023-08-31 01:55:32,955 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 121 predicate places. [2023-08-31 01:55:32,956 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 187 transitions, 2058 flow [2023-08-31 01:55:32,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.28571428571428) internal successors, (1024), 7 states have internal predecessors, (1024), 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) [2023-08-31 01:55:32,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:55:32,956 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:55:32,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-31 01:55:32,956 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:55:32,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:55:32,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1221748060, now seen corresponding path program 19 times [2023-08-31 01:55:32,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:55:32,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914646887] [2023-08-31 01:55:32,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:55:32,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:55:32,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:55:33,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 01:55:33,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:55:33,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914646887] [2023-08-31 01:55:33,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914646887] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:55:33,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:55:33,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-31 01:55:33,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975256751] [2023-08-31 01:55:33,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:55:33,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 01:55:33,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:55:33,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 01:55:33,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-31 01:55:33,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 327 [2023-08-31 01:55:33,079 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 187 transitions, 2058 flow. Second operand has 7 states, 7 states have (on average 146.28571428571428) internal successors, (1024), 7 states have internal predecessors, (1024), 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) [2023-08-31 01:55:33,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:55:33,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 327 [2023-08-31 01:55:33,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:55:34,278 INFO L130 PetriNetUnfolder]: 4860/10018 cut-off events. [2023-08-31 01:55:34,279 INFO L131 PetriNetUnfolder]: For 51346/51418 co-relation queries the response was YES. [2023-08-31 01:55:34,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43048 conditions, 10018 events. 4860/10018 cut-off events. For 51346/51418 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 86564 event pairs, 2484 based on Foata normal form. 160/10106 useless extension candidates. Maximal degree in co-relation 42992. Up to 7349 conditions per place. [2023-08-31 01:55:34,338 INFO L137 encePairwiseOnDemand]: 319/327 looper letters, 125 selfloop transitions, 15 changer transitions 63/216 dead transitions. [2023-08-31 01:55:34,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 216 transitions, 2327 flow [2023-08-31 01:55:34,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:55:34,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:55:34,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1374 transitions. [2023-08-31 01:55:34,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46687054026503566 [2023-08-31 01:55:34,340 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1374 transitions. [2023-08-31 01:55:34,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1374 transitions. [2023-08-31 01:55:34,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:55:34,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1374 transitions. [2023-08-31 01:55:34,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 152.66666666666666) internal successors, (1374), 9 states have internal predecessors, (1374), 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) [2023-08-31 01:55:34,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 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) [2023-08-31 01:55:34,344 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 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) [2023-08-31 01:55:34,344 INFO L175 Difference]: Start difference. First operand has 166 places, 187 transitions, 2058 flow. Second operand 9 states and 1374 transitions. [2023-08-31 01:55:34,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 216 transitions, 2327 flow [2023-08-31 01:55:34,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 216 transitions, 2161 flow, removed 42 selfloop flow, removed 8 redundant places. [2023-08-31 01:55:34,689 INFO L231 Difference]: Finished difference. Result has 164 places, 109 transitions, 919 flow [2023-08-31 01:55:34,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1056, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=919, PETRI_PLACES=164, PETRI_TRANSITIONS=109} [2023-08-31 01:55:34,690 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 119 predicate places. [2023-08-31 01:55:34,690 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 109 transitions, 919 flow [2023-08-31 01:55:34,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.28571428571428) internal successors, (1024), 7 states have internal predecessors, (1024), 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) [2023-08-31 01:55:34,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:55:34,691 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:55:34,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-31 01:55:34,691 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:55:34,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:55:34,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1101595256, now seen corresponding path program 20 times [2023-08-31 01:55:34,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:55:34,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78706183] [2023-08-31 01:55:34,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:55:34,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:55:34,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:55:35,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:55:35,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:55:35,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78706183] [2023-08-31 01:55:35,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78706183] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:55:35,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658195607] [2023-08-31 01:55:35,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:55:35,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:55:35,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:55:35,430 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:55:35,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-31 01:55:35,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-31 01:55:35,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:55:35,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-31 01:55:35,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:55:35,622 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:55:35,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-31 01:55:35,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 01:55:35,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 01:55:35,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658195607] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:55:35,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 01:55:35,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2023-08-31 01:55:35,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742751941] [2023-08-31 01:55:35,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:55:35,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 01:55:35,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:55:35,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 01:55:35,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2023-08-31 01:55:35,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 327 [2023-08-31 01:55:35,741 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 109 transitions, 919 flow. Second operand has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 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) [2023-08-31 01:55:35,741 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:55:35,741 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 327 [2023-08-31 01:55:35,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:55:36,518 INFO L130 PetriNetUnfolder]: 3132/6328 cut-off events. [2023-08-31 01:55:36,518 INFO L131 PetriNetUnfolder]: For 21561/21586 co-relation queries the response was YES. [2023-08-31 01:55:36,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24528 conditions, 6328 events. 3132/6328 cut-off events. For 21561/21586 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 51103 event pairs, 1560 based on Foata normal form. 9/6097 useless extension candidates. Maximal degree in co-relation 24477. Up to 3667 conditions per place. [2023-08-31 01:55:36,547 INFO L137 encePairwiseOnDemand]: 319/327 looper letters, 110 selfloop transitions, 17 changer transitions 16/171 dead transitions. [2023-08-31 01:55:36,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 171 transitions, 1528 flow [2023-08-31 01:55:36,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:55:36,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:55:36,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1349 transitions. [2023-08-31 01:55:36,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583758069996602 [2023-08-31 01:55:36,549 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1349 transitions. [2023-08-31 01:55:36,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1349 transitions. [2023-08-31 01:55:36,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:55:36,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1349 transitions. [2023-08-31 01:55:36,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 149.88888888888889) internal successors, (1349), 9 states have internal predecessors, (1349), 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) [2023-08-31 01:55:36,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 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) [2023-08-31 01:55:36,552 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 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) [2023-08-31 01:55:36,552 INFO L175 Difference]: Start difference. First operand has 164 places, 109 transitions, 919 flow. Second operand 9 states and 1349 transitions. [2023-08-31 01:55:36,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 171 transitions, 1528 flow [2023-08-31 01:55:36,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 171 transitions, 1441 flow, removed 24 selfloop flow, removed 17 redundant places. [2023-08-31 01:55:36,621 INFO L231 Difference]: Finished difference. Result has 151 places, 113 transitions, 937 flow [2023-08-31 01:55:36,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=859, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=937, PETRI_PLACES=151, PETRI_TRANSITIONS=113} [2023-08-31 01:55:36,622 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 106 predicate places. [2023-08-31 01:55:36,622 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 113 transitions, 937 flow [2023-08-31 01:55:36,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 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) [2023-08-31 01:55:36,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:55:36,622 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:55:36,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-31 01:55:36,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-08-31 01:55:36,828 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:55:36,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:55:36,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1727604590, now seen corresponding path program 21 times [2023-08-31 01:55:36,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:55:36,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325647504] [2023-08-31 01:55:36,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:55:36,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:55:36,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:55:36,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 01:55:36,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:55:36,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325647504] [2023-08-31 01:55:36,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325647504] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:55:36,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:55:36,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-31 01:55:36,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768190281] [2023-08-31 01:55:36,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:55:36,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 01:55:36,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:55:36,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 01:55:36,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-31 01:55:37,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 327 [2023-08-31 01:55:37,051 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 113 transitions, 937 flow. Second operand has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 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) [2023-08-31 01:55:37,051 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:55:37,051 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 327 [2023-08-31 01:55:37,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:55:37,737 INFO L130 PetriNetUnfolder]: 3198/6532 cut-off events. [2023-08-31 01:55:37,737 INFO L131 PetriNetUnfolder]: For 20622/20647 co-relation queries the response was YES. [2023-08-31 01:55:37,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25630 conditions, 6532 events. 3198/6532 cut-off events. For 20622/20647 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 53054 event pairs, 1620 based on Foata normal form. 9/6301 useless extension candidates. Maximal degree in co-relation 25584. Up to 3883 conditions per place. [2023-08-31 01:55:37,772 INFO L137 encePairwiseOnDemand]: 319/327 looper letters, 126 selfloop transitions, 20 changer transitions 11/185 dead transitions. [2023-08-31 01:55:37,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 185 transitions, 1613 flow [2023-08-31 01:55:37,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 01:55:37,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 01:55:37,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1503 transitions. [2023-08-31 01:55:37,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4596330275229358 [2023-08-31 01:55:37,774 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1503 transitions. [2023-08-31 01:55:37,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1503 transitions. [2023-08-31 01:55:37,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:55:37,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1503 transitions. [2023-08-31 01:55:37,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 150.3) internal successors, (1503), 10 states have internal predecessors, (1503), 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) [2023-08-31 01:55:37,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 327.0) internal successors, (3597), 11 states have internal predecessors, (3597), 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) [2023-08-31 01:55:37,777 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 327.0) internal successors, (3597), 11 states have internal predecessors, (3597), 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) [2023-08-31 01:55:37,777 INFO L175 Difference]: Start difference. First operand has 151 places, 113 transitions, 937 flow. Second operand 10 states and 1503 transitions. [2023-08-31 01:55:37,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 185 transitions, 1613 flow [2023-08-31 01:55:37,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 185 transitions, 1558 flow, removed 12 selfloop flow, removed 6 redundant places. [2023-08-31 01:55:37,832 INFO L231 Difference]: Finished difference. Result has 155 places, 116 transitions, 969 flow [2023-08-31 01:55:37,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=893, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=969, PETRI_PLACES=155, PETRI_TRANSITIONS=116} [2023-08-31 01:55:37,833 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 110 predicate places. [2023-08-31 01:55:37,833 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 116 transitions, 969 flow [2023-08-31 01:55:37,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 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) [2023-08-31 01:55:37,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:55:37,833 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:55:37,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-31 01:55:37,834 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:55:37,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:55:37,834 INFO L85 PathProgramCache]: Analyzing trace with hash -261863682, now seen corresponding path program 22 times [2023-08-31 01:55:37,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:55:37,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246523325] [2023-08-31 01:55:37,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:55:37,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:55:37,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:55:38,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:55:38,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:55:38,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246523325] [2023-08-31 01:55:38,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246523325] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:55:38,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544990553] [2023-08-31 01:55:38,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:55:38,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:55:38,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:55:38,493 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:55:38,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-31 01:55:38,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:55:38,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:55:38,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-31 01:55:38,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:55:38,672 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:55:38,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-31 01:55:38,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 01:55:38,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 01:55:38,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544990553] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:55:38,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 01:55:38,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2023-08-31 01:55:38,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842251069] [2023-08-31 01:55:38,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:55:38,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 01:55:38,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:55:38,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 01:55:38,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2023-08-31 01:55:38,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 327 [2023-08-31 01:55:38,759 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 116 transitions, 969 flow. Second operand has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 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) [2023-08-31 01:55:38,759 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:55:38,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 327 [2023-08-31 01:55:38,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:55:39,424 INFO L130 PetriNetUnfolder]: 3174/6424 cut-off events. [2023-08-31 01:55:39,424 INFO L131 PetriNetUnfolder]: For 20602/20627 co-relation queries the response was YES. [2023-08-31 01:55:39,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25652 conditions, 6424 events. 3174/6424 cut-off events. For 20602/20627 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 51848 event pairs, 1638 based on Foata normal form. 9/6193 useless extension candidates. Maximal degree in co-relation 25605. Up to 3883 conditions per place. [2023-08-31 01:55:39,458 INFO L137 encePairwiseOnDemand]: 319/327 looper letters, 100 selfloop transitions, 18 changer transitions 26/172 dead transitions. [2023-08-31 01:55:39,458 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 172 transitions, 1534 flow [2023-08-31 01:55:39,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 01:55:39,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 01:55:39,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1211 transitions. [2023-08-31 01:55:39,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4629204892966361 [2023-08-31 01:55:39,460 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1211 transitions. [2023-08-31 01:55:39,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1211 transitions. [2023-08-31 01:55:39,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:55:39,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1211 transitions. [2023-08-31 01:55:39,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 151.375) internal successors, (1211), 8 states have internal predecessors, (1211), 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) [2023-08-31 01:55:39,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 327.0) internal successors, (2943), 9 states have internal predecessors, (2943), 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) [2023-08-31 01:55:39,462 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 327.0) internal successors, (2943), 9 states have internal predecessors, (2943), 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) [2023-08-31 01:55:39,463 INFO L175 Difference]: Start difference. First operand has 155 places, 116 transitions, 969 flow. Second operand 8 states and 1211 transitions. [2023-08-31 01:55:39,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 172 transitions, 1534 flow [2023-08-31 01:55:39,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 172 transitions, 1483 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-08-31 01:55:39,517 INFO L231 Difference]: Finished difference. Result has 156 places, 114 transitions, 949 flow [2023-08-31 01:55:39,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=920, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=949, PETRI_PLACES=156, PETRI_TRANSITIONS=114} [2023-08-31 01:55:39,518 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 111 predicate places. [2023-08-31 01:55:39,519 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 114 transitions, 949 flow [2023-08-31 01:55:39,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 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) [2023-08-31 01:55:39,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:55:39,519 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:55:39,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-31 01:55:39,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-31 01:55:39,722 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:55:39,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:55:39,723 INFO L85 PathProgramCache]: Analyzing trace with hash -537786768, now seen corresponding path program 23 times [2023-08-31 01:55:39,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:55:39,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013258283] [2023-08-31 01:55:39,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:55:39,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:55:39,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:55:40,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:55:40,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:55:40,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013258283] [2023-08-31 01:55:40,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013258283] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:55:40,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055754051] [2023-08-31 01:55:40,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:55:40,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:55:40,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:55:40,277 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:55:40,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-31 01:55:40,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:55:40,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:55:40,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-31 01:55:40,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:55:40,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:55:40,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 01:55:40,560 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:55:40,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-31 01:55:40,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 01:55:40,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 01:55:40,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055754051] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:55:40,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 01:55:40,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 18 [2023-08-31 01:55:40,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430087237] [2023-08-31 01:55:40,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:55:40,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 01:55:40,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:55:40,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 01:55:40,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2023-08-31 01:55:40,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 327 [2023-08-31 01:55:40,744 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 114 transitions, 949 flow. Second operand has 10 states, 10 states have (on average 137.8) internal successors, (1378), 10 states have internal predecessors, (1378), 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) [2023-08-31 01:55:40,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:55:40,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 327 [2023-08-31 01:55:40,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:55:41,476 INFO L130 PetriNetUnfolder]: 2976/6160 cut-off events. [2023-08-31 01:55:41,476 INFO L131 PetriNetUnfolder]: For 19170/19195 co-relation queries the response was YES. [2023-08-31 01:55:41,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24308 conditions, 6160 events. 2976/6160 cut-off events. For 19170/19195 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 50059 event pairs, 1665 based on Foata normal form. 9/5929 useless extension candidates. Maximal degree in co-relation 24261. Up to 3594 conditions per place. [2023-08-31 01:55:41,513 INFO L137 encePairwiseOnDemand]: 319/327 looper letters, 85 selfloop transitions, 17 changer transitions 27/157 dead transitions. [2023-08-31 01:55:41,513 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 157 transitions, 1426 flow [2023-08-31 01:55:41,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 01:55:41,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 01:55:41,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1157 transitions. [2023-08-31 01:55:41,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4422782874617737 [2023-08-31 01:55:41,516 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1157 transitions. [2023-08-31 01:55:41,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1157 transitions. [2023-08-31 01:55:41,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:55:41,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1157 transitions. [2023-08-31 01:55:41,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 144.625) internal successors, (1157), 8 states have internal predecessors, (1157), 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) [2023-08-31 01:55:41,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 327.0) internal successors, (2943), 9 states have internal predecessors, (2943), 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) [2023-08-31 01:55:41,519 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 327.0) internal successors, (2943), 9 states have internal predecessors, (2943), 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) [2023-08-31 01:55:41,519 INFO L175 Difference]: Start difference. First operand has 156 places, 114 transitions, 949 flow. Second operand 8 states and 1157 transitions. [2023-08-31 01:55:41,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 157 transitions, 1426 flow [2023-08-31 01:55:41,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 157 transitions, 1371 flow, removed 3 selfloop flow, removed 9 redundant places. [2023-08-31 01:55:41,561 INFO L231 Difference]: Finished difference. Result has 155 places, 114 transitions, 961 flow [2023-08-31 01:55:41,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=900, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=961, PETRI_PLACES=155, PETRI_TRANSITIONS=114} [2023-08-31 01:55:41,562 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 110 predicate places. [2023-08-31 01:55:41,562 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 114 transitions, 961 flow [2023-08-31 01:55:41,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 137.8) internal successors, (1378), 10 states have internal predecessors, (1378), 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) [2023-08-31 01:55:41,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:55:41,562 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:55:41,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-31 01:55:41,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-31 01:55:41,768 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:55:41,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:55:41,768 INFO L85 PathProgramCache]: Analyzing trace with hash -709821156, now seen corresponding path program 24 times [2023-08-31 01:55:41,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:55:41,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032923471] [2023-08-31 01:55:41,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:55:41,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:55:41,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:55:42,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:55:42,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:55:42,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032923471] [2023-08-31 01:55:42,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032923471] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:55:42,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968196968] [2023-08-31 01:55:42,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:55:42,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:55:42,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:55:42,401 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:55:42,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-31 01:55:42,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-31 01:55:42,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:55:42,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-31 01:55:42,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:55:42,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:55:42,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 01:55:42,703 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:55:42,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-31 01:55:42,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 01:55:42,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 01:55:42,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968196968] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:55:42,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 01:55:42,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2023-08-31 01:55:42,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958812341] [2023-08-31 01:55:42,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:55:42,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 01:55:42,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:55:42,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 01:55:42,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2023-08-31 01:55:42,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 327 [2023-08-31 01:55:42,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 114 transitions, 961 flow. Second operand has 10 states, 10 states have (on average 137.8) internal successors, (1378), 10 states have internal predecessors, (1378), 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) [2023-08-31 01:55:42,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:55:42,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 327 [2023-08-31 01:55:42,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:55:43,761 INFO L130 PetriNetUnfolder]: 2832/5854 cut-off events. [2023-08-31 01:55:43,761 INFO L131 PetriNetUnfolder]: For 18207/18232 co-relation queries the response was YES. [2023-08-31 01:55:43,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23131 conditions, 5854 events. 2832/5854 cut-off events. For 18207/18232 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 47264 event pairs, 1665 based on Foata normal form. 9/5623 useless extension candidates. Maximal degree in co-relation 23083. Up to 3393 conditions per place. [2023-08-31 01:55:43,794 INFO L137 encePairwiseOnDemand]: 319/327 looper letters, 81 selfloop transitions, 16 changer transitions 22/147 dead transitions. [2023-08-31 01:55:43,794 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 147 transitions, 1355 flow [2023-08-31 01:55:43,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:55:43,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:55:43,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1283 transitions. [2023-08-31 01:55:43,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435949711179069 [2023-08-31 01:55:43,797 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1283 transitions. [2023-08-31 01:55:43,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1283 transitions. [2023-08-31 01:55:43,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:55:43,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1283 transitions. [2023-08-31 01:55:43,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 142.55555555555554) internal successors, (1283), 9 states have internal predecessors, (1283), 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) [2023-08-31 01:55:43,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 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) [2023-08-31 01:55:43,800 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 327.0) internal successors, (3270), 10 states have internal predecessors, (3270), 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) [2023-08-31 01:55:43,800 INFO L175 Difference]: Start difference. First operand has 155 places, 114 transitions, 961 flow. Second operand 9 states and 1283 transitions. [2023-08-31 01:55:43,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 147 transitions, 1355 flow [2023-08-31 01:55:43,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 147 transitions, 1303 flow, removed 9 selfloop flow, removed 6 redundant places. [2023-08-31 01:55:43,858 INFO L231 Difference]: Finished difference. Result has 156 places, 113 transitions, 941 flow [2023-08-31 01:55:43,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=913, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=941, PETRI_PLACES=156, PETRI_TRANSITIONS=113} [2023-08-31 01:55:43,858 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 111 predicate places. [2023-08-31 01:55:43,858 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 113 transitions, 941 flow [2023-08-31 01:55:43,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 137.8) internal successors, (1378), 10 states have internal predecessors, (1378), 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) [2023-08-31 01:55:43,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:55:43,859 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:55:43,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-31 01:55:44,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:55:44,064 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:55:44,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:55:44,065 INFO L85 PathProgramCache]: Analyzing trace with hash -355322796, now seen corresponding path program 25 times [2023-08-31 01:55:44,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:55:44,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959686493] [2023-08-31 01:55:44,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:55:44,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:55:44,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:55:44,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:55:44,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:55:44,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959686493] [2023-08-31 01:55:44,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959686493] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:55:44,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801013227] [2023-08-31 01:55:44,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:55:44,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:55:44,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:55:44,806 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:55:44,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-31 01:55:44,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:55:44,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-31 01:55:44,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:55:45,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:55:45,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 01:55:45,124 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:55:45,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-31 01:55:45,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:55:45,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:55:47,321 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:55:47,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 114 [2023-08-31 01:55:47,337 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:55:47,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 52 [2023-08-31 01:55:47,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 01:55:47,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801013227] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 01:55:47,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 01:55:47,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11, 9] total 26 [2023-08-31 01:55:47,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337562047] [2023-08-31 01:55:47,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:55:47,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 01:55:47,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:55:47,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 01:55:47,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=676, Unknown=6, NotChecked=0, Total=756 [2023-08-31 01:55:49,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:55:51,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:55:53,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:55:55,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 01:55:55,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 327 [2023-08-31 01:55:55,746 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 113 transitions, 941 flow. Second operand has 10 states, 10 states have (on average 127.8) internal successors, (1278), 10 states have internal predecessors, (1278), 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) [2023-08-31 01:55:55,746 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:55:55,746 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 327 [2023-08-31 01:55:55,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:55:56,820 INFO L130 PetriNetUnfolder]: 2841/5800 cut-off events. [2023-08-31 01:55:56,821 INFO L131 PetriNetUnfolder]: For 17292/17317 co-relation queries the response was YES. [2023-08-31 01:55:56,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22518 conditions, 5800 events. 2841/5800 cut-off events. For 17292/17317 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 46811 event pairs, 1590 based on Foata normal form. 9/5566 useless extension candidates. Maximal degree in co-relation 22471. Up to 3474 conditions per place. [2023-08-31 01:55:56,855 INFO L137 encePairwiseOnDemand]: 313/327 looper letters, 62 selfloop transitions, 9 changer transitions 58/151 dead transitions. [2023-08-31 01:55:56,855 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 151 transitions, 1354 flow [2023-08-31 01:55:56,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 01:55:56,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 01:55:56,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1323 transitions. [2023-08-31 01:55:56,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40458715596330275 [2023-08-31 01:55:56,857 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1323 transitions. [2023-08-31 01:55:56,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1323 transitions. [2023-08-31 01:55:56,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:55:56,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1323 transitions. [2023-08-31 01:55:56,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 132.3) internal successors, (1323), 10 states have internal predecessors, (1323), 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) [2023-08-31 01:55:56,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 327.0) internal successors, (3597), 11 states have internal predecessors, (3597), 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) [2023-08-31 01:55:56,861 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 327.0) internal successors, (3597), 11 states have internal predecessors, (3597), 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) [2023-08-31 01:55:56,861 INFO L175 Difference]: Start difference. First operand has 156 places, 113 transitions, 941 flow. Second operand 10 states and 1323 transitions. [2023-08-31 01:55:56,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 151 transitions, 1354 flow [2023-08-31 01:55:56,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 151 transitions, 1293 flow, removed 5 selfloop flow, removed 9 redundant places. [2023-08-31 01:55:56,915 INFO L231 Difference]: Finished difference. Result has 156 places, 91 transitions, 741 flow [2023-08-31 01:55:56,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=882, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=741, PETRI_PLACES=156, PETRI_TRANSITIONS=91} [2023-08-31 01:55:56,916 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 111 predicate places. [2023-08-31 01:55:56,916 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 91 transitions, 741 flow [2023-08-31 01:55:56,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 127.8) internal successors, (1278), 10 states have internal predecessors, (1278), 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) [2023-08-31 01:55:56,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:55:56,916 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:55:56,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-31 01:55:57,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-31 01:55:57,122 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:55:57,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:55:57,122 INFO L85 PathProgramCache]: Analyzing trace with hash -751429968, now seen corresponding path program 26 times [2023-08-31 01:55:57,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:55:57,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907893215] [2023-08-31 01:55:57,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:55:57,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:55:57,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:55:57,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:55:57,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:55:57,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907893215] [2023-08-31 01:55:57,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907893215] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:55:57,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297766918] [2023-08-31 01:55:57,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:55:57,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:55:57,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:55:57,780 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:55:57,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-31 01:55:57,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-31 01:55:57,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:55:57,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-31 01:55:57,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:55:58,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:55:58,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 01:55:58,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:55:58,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 01:55:58,138 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:55:58,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-31 01:55:58,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 01:55:58,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 01:55:58,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297766918] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:55:58,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 01:55:58,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 19 [2023-08-31 01:55:58,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878577613] [2023-08-31 01:55:58,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:55:58,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 01:55:58,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:55:58,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 01:55:58,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2023-08-31 01:55:58,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 327 [2023-08-31 01:55:58,429 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 91 transitions, 741 flow. Second operand has 11 states, 11 states have (on average 135.54545454545453) internal successors, (1491), 11 states have internal predecessors, (1491), 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) [2023-08-31 01:55:58,429 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:55:58,429 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 327 [2023-08-31 01:55:58,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:55:59,107 INFO L130 PetriNetUnfolder]: 2277/4693 cut-off events. [2023-08-31 01:55:59,107 INFO L131 PetriNetUnfolder]: For 15511/15596 co-relation queries the response was YES. [2023-08-31 01:55:59,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18927 conditions, 4693 events. 2277/4693 cut-off events. For 15511/15596 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 35800 event pairs, 860 based on Foata normal form. 9/4526 useless extension candidates. Maximal degree in co-relation 18882. Up to 2334 conditions per place. [2023-08-31 01:55:59,131 INFO L137 encePairwiseOnDemand]: 319/327 looper letters, 73 selfloop transitions, 23 changer transitions 24/142 dead transitions. [2023-08-31 01:55:59,132 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 142 transitions, 1244 flow [2023-08-31 01:55:59,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 01:55:59,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 01:55:59,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1405 transitions. [2023-08-31 01:55:59,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42966360856269115 [2023-08-31 01:55:59,134 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1405 transitions. [2023-08-31 01:55:59,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1405 transitions. [2023-08-31 01:55:59,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:55:59,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1405 transitions. [2023-08-31 01:55:59,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 140.5) internal successors, (1405), 10 states have internal predecessors, (1405), 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) [2023-08-31 01:55:59,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 327.0) internal successors, (3597), 11 states have internal predecessors, (3597), 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) [2023-08-31 01:55:59,138 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 327.0) internal successors, (3597), 11 states have internal predecessors, (3597), 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) [2023-08-31 01:55:59,138 INFO L175 Difference]: Start difference. First operand has 156 places, 91 transitions, 741 flow. Second operand 10 states and 1405 transitions. [2023-08-31 01:55:59,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 142 transitions, 1244 flow [2023-08-31 01:55:59,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 142 transitions, 1107 flow, removed 11 selfloop flow, removed 19 redundant places. [2023-08-31 01:55:59,176 INFO L231 Difference]: Finished difference. Result has 132 places, 95 transitions, 727 flow [2023-08-31 01:55:59,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=627, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=727, PETRI_PLACES=132, PETRI_TRANSITIONS=95} [2023-08-31 01:55:59,177 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 87 predicate places. [2023-08-31 01:55:59,177 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 95 transitions, 727 flow [2023-08-31 01:55:59,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 135.54545454545453) internal successors, (1491), 11 states have internal predecessors, (1491), 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) [2023-08-31 01:55:59,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:55:59,177 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:55:59,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-31 01:55:59,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-31 01:55:59,382 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:55:59,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:55:59,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1758720650, now seen corresponding path program 27 times [2023-08-31 01:55:59,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:55:59,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770047047] [2023-08-31 01:55:59,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:55:59,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:55:59,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:56:00,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:00,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:56:00,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770047047] [2023-08-31 01:56:00,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770047047] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:56:00,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631671844] [2023-08-31 01:56:00,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:56:00,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:56:00,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:56:00,154 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:56:00,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-31 01:56:00,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-31 01:56:00,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:56:00,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-31 01:56:00,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:56:00,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:56:00,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 01:56:00,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:56:00,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 01:56:00,535 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:56:00,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-31 01:56:00,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 01:56:00,544 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 01:56:00,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631671844] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:56:00,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 01:56:00,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 19 [2023-08-31 01:56:00,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750418386] [2023-08-31 01:56:00,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:56:00,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 01:56:00,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:56:00,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 01:56:00,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2023-08-31 01:56:00,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 327 [2023-08-31 01:56:00,781 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 95 transitions, 727 flow. Second operand has 11 states, 11 states have (on average 135.54545454545453) internal successors, (1491), 11 states have internal predecessors, (1491), 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) [2023-08-31 01:56:00,781 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:56:00,781 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 327 [2023-08-31 01:56:00,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:56:01,517 INFO L130 PetriNetUnfolder]: 2235/4623 cut-off events. [2023-08-31 01:56:01,517 INFO L131 PetriNetUnfolder]: For 14471/14556 co-relation queries the response was YES. [2023-08-31 01:56:01,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17955 conditions, 4623 events. 2235/4623 cut-off events. For 14471/14556 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 35402 event pairs, 798 based on Foata normal form. 13/4460 useless extension candidates. Maximal degree in co-relation 17917. Up to 2128 conditions per place. [2023-08-31 01:56:01,538 INFO L137 encePairwiseOnDemand]: 319/327 looper letters, 59 selfloop transitions, 20 changer transitions 55/145 dead transitions. [2023-08-31 01:56:01,538 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 145 transitions, 1207 flow [2023-08-31 01:56:01,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 01:56:01,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 01:56:01,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1406 transitions. [2023-08-31 01:56:01,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42996941896024465 [2023-08-31 01:56:01,541 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1406 transitions. [2023-08-31 01:56:01,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1406 transitions. [2023-08-31 01:56:01,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:56:01,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1406 transitions. [2023-08-31 01:56:01,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 140.6) internal successors, (1406), 10 states have internal predecessors, (1406), 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) [2023-08-31 01:56:01,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 327.0) internal successors, (3597), 11 states have internal predecessors, (3597), 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) [2023-08-31 01:56:01,544 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 327.0) internal successors, (3597), 11 states have internal predecessors, (3597), 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) [2023-08-31 01:56:01,545 INFO L175 Difference]: Start difference. First operand has 132 places, 95 transitions, 727 flow. Second operand 10 states and 1406 transitions. [2023-08-31 01:56:01,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 145 transitions, 1207 flow [2023-08-31 01:56:01,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 145 transitions, 1151 flow, removed 15 selfloop flow, removed 6 redundant places. [2023-08-31 01:56:01,590 INFO L231 Difference]: Finished difference. Result has 134 places, 67 transitions, 462 flow [2023-08-31 01:56:01,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=677, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=462, PETRI_PLACES=134, PETRI_TRANSITIONS=67} [2023-08-31 01:56:01,590 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 89 predicate places. [2023-08-31 01:56:01,590 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 67 transitions, 462 flow [2023-08-31 01:56:01,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 135.54545454545453) internal successors, (1491), 11 states have internal predecessors, (1491), 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) [2023-08-31 01:56:01,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:56:01,591 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:56:01,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-31 01:56:01,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-31 01:56:01,796 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:56:01,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:56:01,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1522566620, now seen corresponding path program 28 times [2023-08-31 01:56:01,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:56:01,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174034781] [2023-08-31 01:56:01,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:56:01,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:56:01,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:56:02,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:02,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:56:02,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174034781] [2023-08-31 01:56:02,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174034781] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:56:02,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810427839] [2023-08-31 01:56:02,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:56:02,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:56:02,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:56:02,396 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:56:02,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-31 01:56:02,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:56:02,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:56:02,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-31 01:56:02,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:56:02,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:56:02,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 01:56:02,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 01:56:02,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-31 01:56:02,814 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 01:56:02,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-08-31 01:56:02,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 01:56:02,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 01:56:02,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810427839] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:56:02,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 01:56:02,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 18 [2023-08-31 01:56:02,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638720755] [2023-08-31 01:56:02,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:56:02,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 01:56:02,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:56:02,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 01:56:02,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2023-08-31 01:56:03,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 327 [2023-08-31 01:56:03,052 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 67 transitions, 462 flow. Second operand has 11 states, 11 states have (on average 135.54545454545453) internal successors, (1491), 11 states have internal predecessors, (1491), 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) [2023-08-31 01:56:03,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:56:03,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 327 [2023-08-31 01:56:03,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:56:03,376 INFO L130 PetriNetUnfolder]: 561/1175 cut-off events. [2023-08-31 01:56:03,377 INFO L131 PetriNetUnfolder]: For 6243/6243 co-relation queries the response was YES. [2023-08-31 01:56:03,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4840 conditions, 1175 events. 561/1175 cut-off events. For 6243/6243 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6431 event pairs, 164 based on Foata normal form. 6/1127 useless extension candidates. Maximal degree in co-relation 4803. Up to 342 conditions per place. [2023-08-31 01:56:03,381 INFO L137 encePairwiseOnDemand]: 319/327 looper letters, 0 selfloop transitions, 0 changer transitions 93/93 dead transitions. [2023-08-31 01:56:03,381 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 93 transitions, 737 flow [2023-08-31 01:56:03,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 01:56:03,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 01:56:03,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1117 transitions. [2023-08-31 01:56:03,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42698776758409784 [2023-08-31 01:56:03,383 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1117 transitions. [2023-08-31 01:56:03,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1117 transitions. [2023-08-31 01:56:03,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:56:03,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1117 transitions. [2023-08-31 01:56:03,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 139.625) internal successors, (1117), 8 states have internal predecessors, (1117), 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) [2023-08-31 01:56:03,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 327.0) internal successors, (2943), 9 states have internal predecessors, (2943), 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) [2023-08-31 01:56:03,387 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 327.0) internal successors, (2943), 9 states have internal predecessors, (2943), 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) [2023-08-31 01:56:03,387 INFO L175 Difference]: Start difference. First operand has 134 places, 67 transitions, 462 flow. Second operand 8 states and 1117 transitions. [2023-08-31 01:56:03,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 93 transitions, 737 flow [2023-08-31 01:56:03,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 93 transitions, 563 flow, removed 24 selfloop flow, removed 32 redundant places. [2023-08-31 01:56:03,392 INFO L231 Difference]: Finished difference. Result has 89 places, 0 transitions, 0 flow [2023-08-31 01:56:03,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=89, PETRI_TRANSITIONS=0} [2023-08-31 01:56:03,393 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 44 predicate places. [2023-08-31 01:56:03,393 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 0 transitions, 0 flow [2023-08-31 01:56:03,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 135.54545454545453) internal successors, (1491), 11 states have internal predecessors, (1491), 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) [2023-08-31 01:56:03,395 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-31 01:56:03,396 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-31 01:56:03,396 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-31 01:56:03,396 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-31 01:56:03,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-08-31 01:56:03,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-31 01:56:03,601 INFO L445 BasicCegarLoop]: Path program histogram: [28, 1] [2023-08-31 01:56:03,603 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-31 01:56:03,603 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-31 01:56:03,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.08 01:56:03 BasicIcfg [2023-08-31 01:56:03,605 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-31 01:56:03,605 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-31 01:56:03,605 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-31 01:56:03,605 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-31 01:56:03,606 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 01:53:57" (3/4) ... [2023-08-31 01:56:03,608 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-08-31 01:56:03,611 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-08-31 01:56:03,611 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-08-31 01:56:03,611 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2023-08-31 01:56:03,615 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 25 nodes and edges [2023-08-31 01:56:03,615 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-08-31 01:56:03,616 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-08-31 01:56:03,616 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-08-31 01:56:03,641 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-08-31 01:56:03,641 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-31 01:56:03,641 INFO L158 Benchmark]: Toolchain (without parser) took 127063.06ms. Allocated memory was 109.1MB in the beginning and 9.1GB in the end (delta: 9.0GB). Free memory was 86.6MB in the beginning and 2.1GB in the end (delta: -2.1GB). Peak memory consumption was 6.9GB. Max. memory is 16.1GB. [2023-08-31 01:56:03,642 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 69.2MB. Free memory was 47.8MB in the beginning and 47.7MB in the end (delta: 78.8kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-31 01:56:03,642 INFO L158 Benchmark]: CACSL2BoogieTranslator took 197.62ms. Allocated memory is still 109.1MB. Free memory was 86.6MB in the beginning and 74.4MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-08-31 01:56:03,642 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.52ms. Allocated memory is still 109.1MB. Free memory was 74.4MB in the beginning and 72.0MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-31 01:56:03,642 INFO L158 Benchmark]: Boogie Preprocessor took 40.47ms. Allocated memory is still 109.1MB. Free memory was 72.0MB in the beginning and 70.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-31 01:56:03,642 INFO L158 Benchmark]: RCFGBuilder took 578.83ms. Allocated memory is still 109.1MB. Free memory was 70.2MB in the beginning and 76.9MB in the end (delta: -6.7MB). Peak memory consumption was 17.5MB. Max. memory is 16.1GB. [2023-08-31 01:56:03,643 INFO L158 Benchmark]: TraceAbstraction took 126161.04ms. Allocated memory was 109.1MB in the beginning and 9.1GB in the end (delta: 9.0GB). Free memory was 75.8MB in the beginning and 2.2GB in the end (delta: -2.1GB). Peak memory consumption was 6.9GB. Max. memory is 16.1GB. [2023-08-31 01:56:03,643 INFO L158 Benchmark]: Witness Printer took 35.82ms. Allocated memory is still 9.1GB. Free memory was 2.2GB in the beginning and 2.1GB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-08-31 01:56:03,644 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 69.2MB. Free memory was 47.8MB in the beginning and 47.7MB in the end (delta: 78.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 197.62ms. Allocated memory is still 109.1MB. Free memory was 86.6MB in the beginning and 74.4MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.52ms. Allocated memory is still 109.1MB. Free memory was 74.4MB in the beginning and 72.0MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 40.47ms. Allocated memory is still 109.1MB. Free memory was 72.0MB in the beginning and 70.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 578.83ms. Allocated memory is still 109.1MB. Free memory was 70.2MB in the beginning and 76.9MB in the end (delta: -6.7MB). Peak memory consumption was 17.5MB. Max. memory is 16.1GB. * TraceAbstraction took 126161.04ms. Allocated memory was 109.1MB in the beginning and 9.1GB in the end (delta: 9.0GB). Free memory was 75.8MB in the beginning and 2.2GB in the end (delta: -2.1GB). Peak memory consumption was 6.9GB. Max. memory is 16.1GB. * Witness Printer took 35.82ms. Allocated memory is still 9.1GB. Free memory was 2.2GB in the beginning and 2.1GB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.6s, 170 PlacesBefore, 45 PlacesAfterwards, 167 TransitionsBefore, 36 TransitionsAfterwards, 1266 CoEnabledTransitionPairs, 7 FixpointIterations, 101 TrivialSequentialCompositions, 20 ConcurrentSequentialCompositions, 20 TrivialYvCompositions, 0 ConcurrentYvCompositions, 6 ChoiceCompositions, 147 TotalNumberOfCompositions, 7223 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3209, independent: 2894, independent conditional: 0, independent unconditional: 2894, dependent: 315, dependent conditional: 0, dependent unconditional: 315, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 654, independent: 631, independent conditional: 0, independent unconditional: 631, dependent: 23, dependent conditional: 0, dependent unconditional: 23, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3209, independent: 2263, independent conditional: 0, independent unconditional: 2263, dependent: 292, dependent conditional: 0, dependent unconditional: 292, unknown: 654, unknown conditional: 0, unknown unconditional: 654] , Statistics on independence cache: Total cache size (in pairs): 189, Positive cache size: 172, Positive conditional cache size: 0, Positive unconditional cache size: 172, Negative cache size: 17, Negative conditional cache size: 0, Negative unconditional cache size: 17, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 161]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 209 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 126.1s, OverallIterations: 29, TraceHistogramMax: 2, PathProgramHistogramMax: 28, EmptinessCheckTime: 0.0s, AutomataDifference: 93.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.7s, HoareTripleCheckerStatistics: 48 mSolverCounterUnknown, 5553 SdHoareTripleChecker+Valid, 32.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5042 mSDsluCounter, 2937 SdHoareTripleChecker+Invalid, 30.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 381 IncrementalHoareTripleChecker+Unchecked, 2825 mSDsCounter, 153 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 19439 IncrementalHoareTripleChecker+Invalid, 20021 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 153 mSolverCounterUnsat, 112 mSDtfsCounter, 19439 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1246 GetRequests, 703 SyntacticMatches, 6 SemanticMatches, 537 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 2321 ImplicationChecksByTransitivity, 28.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2321occurred in iteration=14, InterpolantAutomatonStates: 278, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 20.9s InterpolantComputationTime, 1729 NumberOfCodeBlocks, 1691 NumberOfCodeBlocksAsserted, 51 NumberOfCheckSat, 1861 ConstructedInterpolants, 78 QuantifiedInterpolants, 26240 SizeOfPredicates, 225 NumberOfNonLiveVariables, 4752 ConjunctsInSsa, 430 ConjunctsInUnsatCore, 52 InterpolantComputations, 27 PerfectInterpolantSequences, 73/135 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-31 01:56:03,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE