./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-counter-fun.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 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 20:14:13,802 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 20:14:13,804 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 20:14:13,847 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 20:14:13,849 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 20:14:13,852 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 20:14:13,854 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 20:14:13,856 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 20:14:13,858 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 20:14:13,862 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 20:14:13,863 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 20:14:13,865 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 20:14:13,865 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 20:14:13,867 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 20:14:13,868 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 20:14:13,872 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 20:14:13,873 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 20:14:13,874 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 20:14:13,875 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 20:14:13,880 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 20:14:13,881 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 20:14:13,890 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 20:14:13,891 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 20:14:13,891 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 20:14:13,898 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 20:14:13,898 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 20:14:13,899 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 20:14:13,901 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 20:14:13,901 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 20:14:13,902 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 20:14:13,902 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 20:14:13,909 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 20:14:13,911 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 20:14:13,911 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 20:14:13,912 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 20:14:13,912 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 20:14:13,913 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 20:14:13,913 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 20:14:13,913 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 20:14:13,914 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 20:14:13,915 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 20:14:13,916 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 20:14:13,948 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 20:14:13,948 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 20:14:13,949 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 20:14:13,950 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 20:14:13,951 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 20:14:13,951 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 20:14:13,951 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 20:14:13,952 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 20:14:13,952 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 20:14:13,952 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 20:14:13,953 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 20:14:13,953 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 20:14:13,953 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 20:14:13,954 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 20:14:13,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 20:14:13,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 20:14:13,954 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 20:14:13,954 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 20:14:13,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 20:14:13,955 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 20:14:13,955 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 20:14:13,955 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 20:14:13,956 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 20:14:13,956 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 20:14:13,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 20:14:13,956 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 20:14:13,956 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 20:14:13,957 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 20:14:13,957 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 20:14:13,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 20:14:13,957 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 20:14:13,958 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 20:14:13,958 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 20:14:13,958 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 20:14:13,958 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 20:14:13,959 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 20:14:14,240 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 20:14:14,260 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 20:14:14,262 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 20:14:14,263 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 20:14:14,264 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 20:14:14,265 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c [2023-08-30 20:14:15,525 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 20:14:15,690 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 20:14:15,691 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c [2023-08-30 20:14:15,696 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07a476f81/c13f1847b713466f9701ee7586057f7e/FLAGf10b10fee [2023-08-30 20:14:15,706 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07a476f81/c13f1847b713466f9701ee7586057f7e [2023-08-30 20:14:15,708 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 20:14:15,709 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 20:14:15,710 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 20:14:15,710 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 20:14:15,715 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 20:14:15,716 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 08:14:15" (1/1) ... [2023-08-30 20:14:15,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a51adf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:14:15, skipping insertion in model container [2023-08-30 20:14:15,717 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 08:14:15" (1/1) ... [2023-08-30 20:14:15,723 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 20:14:15,735 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 20:14:15,908 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/popl20-counter-fun.wvr.c[2681,2694] [2023-08-30 20:14:15,922 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 20:14:15,932 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 20:14:15,976 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/popl20-counter-fun.wvr.c[2681,2694] [2023-08-30 20:14:15,978 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 20:14:15,984 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 20:14:15,984 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 20:14:15,989 INFO L208 MainTranslator]: Completed translation [2023-08-30 20:14:15,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:14:15 WrapperNode [2023-08-30 20:14:15,990 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 20:14:15,991 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 20:14:15,991 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 20:14:15,991 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 20:14:15,997 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:14:15" (1/1) ... [2023-08-30 20:14:16,009 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:14:15" (1/1) ... [2023-08-30 20:14:16,040 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 198 [2023-08-30 20:14:16,040 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 20:14:16,041 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 20:14:16,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 20:14:16,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 20:14:16,047 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:14:15" (1/1) ... [2023-08-30 20:14:16,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:14:15" (1/1) ... [2023-08-30 20:14:16,050 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:14:15" (1/1) ... [2023-08-30 20:14:16,050 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:14:15" (1/1) ... [2023-08-30 20:14:16,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:14:15" (1/1) ... [2023-08-30 20:14:16,061 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:14:15" (1/1) ... [2023-08-30 20:14:16,062 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:14:15" (1/1) ... [2023-08-30 20:14:16,063 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:14:15" (1/1) ... [2023-08-30 20:14:16,066 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 20:14:16,066 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 20:14:16,066 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 20:14:16,067 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 20:14:16,067 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:14:15" (1/1) ... [2023-08-30 20:14:16,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 20:14:16,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:14:16,101 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 20:14:16,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 20:14:16,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 20:14:16,143 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 20:14:16,143 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 20:14:16,143 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 20:14:16,143 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 20:14:16,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 20:14:16,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 20:14:16,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 20:14:16,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 20:14:16,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 20:14:16,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 20:14:16,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 20:14:16,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 20:14:16,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 20:14:16,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 20:14:16,146 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 20:14:16,257 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 20:14:16,259 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 20:14:16,601 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 20:14:16,754 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 20:14:16,754 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 20:14:16,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 08:14:16 BoogieIcfgContainer [2023-08-30 20:14:16,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 20:14:16,758 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 20:14:16,758 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 20:14:16,761 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 20:14:16,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 08:14:15" (1/3) ... [2023-08-30 20:14:16,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@202e1ec2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 08:14:16, skipping insertion in model container [2023-08-30 20:14:16,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:14:15" (2/3) ... [2023-08-30 20:14:16,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@202e1ec2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 08:14:16, skipping insertion in model container [2023-08-30 20:14:16,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 08:14:16" (3/3) ... [2023-08-30 20:14:16,763 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2023-08-30 20:14:16,770 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 20:14:16,778 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 20:14:16,778 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 20:14:16,778 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 20:14:16,824 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 20:14:16,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 155 transitions, 326 flow [2023-08-30 20:14:16,915 INFO L130 PetriNetUnfolder]: 13/153 cut-off events. [2023-08-30 20:14:16,916 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 20:14:16,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 153 events. 13/153 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 87 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 120. Up to 2 conditions per place. [2023-08-30 20:14:16,920 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 155 transitions, 326 flow [2023-08-30 20:14:16,924 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 139 places, 145 transitions, 302 flow [2023-08-30 20:14:16,927 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 20:14:16,935 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 139 places, 145 transitions, 302 flow [2023-08-30 20:14:16,938 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 139 places, 145 transitions, 302 flow [2023-08-30 20:14:16,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 145 transitions, 302 flow [2023-08-30 20:14:16,972 INFO L130 PetriNetUnfolder]: 13/145 cut-off events. [2023-08-30 20:14:16,974 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 20:14:16,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 145 events. 13/145 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 86 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 120. Up to 2 conditions per place. [2023-08-30 20:14:16,980 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2023-08-30 20:14:21,728 INFO L134 LiptonReduction]: Checked pairs total: 553 [2023-08-30 20:14:21,730 INFO L136 LiptonReduction]: Total number of compositions: 150 [2023-08-30 20:14:21,741 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 20:14:21,746 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;@27ec7422, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 20:14:21,746 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 20:14:21,751 INFO L130 PetriNetUnfolder]: 4/18 cut-off events. [2023-08-30 20:14:21,751 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 20:14:21,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:14:21,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:14:21,752 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:14:21,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:14:21,757 INFO L85 PathProgramCache]: Analyzing trace with hash -511726821, now seen corresponding path program 1 times [2023-08-30 20:14:21,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:14:21,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118686823] [2023-08-30 20:14:21,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:14:21,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:14:21,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:22,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:14:22,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:14:22,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118686823] [2023-08-30 20:14:22,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118686823] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:14:22,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:14:22,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 20:14:22,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371609206] [2023-08-30 20:14:22,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:14:22,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 20:14:22,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:14:22,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 20:14:22,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 20:14:22,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 305 [2023-08-30 20:14:22,252 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:22,252 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:14:22,252 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 305 [2023-08-30 20:14:22,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:14:22,322 INFO L130 PetriNetUnfolder]: 67/118 cut-off events. [2023-08-30 20:14:22,322 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-30 20:14:22,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 118 events. 67/118 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 329 event pairs, 9 based on Foata normal form. 1/76 useless extension candidates. Maximal degree in co-relation 179. Up to 85 conditions per place. [2023-08-30 20:14:22,325 INFO L137 encePairwiseOnDemand]: 301/305 looper letters, 23 selfloop transitions, 3 changer transitions 1/29 dead transitions. [2023-08-30 20:14:22,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 29 transitions, 133 flow [2023-08-30 20:14:22,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 20:14:22,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 20:14:22,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 442 transitions. [2023-08-30 20:14:22,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4830601092896175 [2023-08-30 20:14:22,349 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 442 transitions. [2023-08-30 20:14:22,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 442 transitions. [2023-08-30 20:14:22,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:14:22,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 442 transitions. [2023-08-30 20:14:22,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:22,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:22,366 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:22,368 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 50 flow. Second operand 3 states and 442 transitions. [2023-08-30 20:14:22,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 29 transitions, 133 flow [2023-08-30 20:14:22,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 29 transitions, 119 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 20:14:22,372 INFO L231 Difference]: Finished difference. Result has 21 places, 21 transitions, 61 flow [2023-08-30 20:14:22,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=61, PETRI_PLACES=21, PETRI_TRANSITIONS=21} [2023-08-30 20:14:22,380 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2023-08-30 20:14:22,380 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 21 transitions, 61 flow [2023-08-30 20:14:22,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:22,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:14:22,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:14:22,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 20:14:22,385 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:14:22,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:14:22,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1737231503, now seen corresponding path program 1 times [2023-08-30 20:14:22,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:14:22,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341719673] [2023-08-30 20:14:22,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:14:22,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:14:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:22,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:14:22,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:14:22,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341719673] [2023-08-30 20:14:22,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341719673] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:14:22,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:14:22,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:14:22,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847145186] [2023-08-30 20:14:22,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:14:22,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:14:22,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:14:22,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:14:22,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:14:22,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 305 [2023-08-30 20:14:22,615 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 21 transitions, 61 flow. Second operand has 5 states, 5 states have (on average 134.2) internal successors, (671), 5 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:22,615 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:14:22,615 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 305 [2023-08-30 20:14:22,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:14:22,738 INFO L130 PetriNetUnfolder]: 94/179 cut-off events. [2023-08-30 20:14:22,738 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-08-30 20:14:22,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429 conditions, 179 events. 94/179 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 576 event pairs, 26 based on Foata normal form. 4/181 useless extension candidates. Maximal degree in co-relation 144. Up to 88 conditions per place. [2023-08-30 20:14:22,740 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 34 selfloop transitions, 4 changer transitions 8/46 dead transitions. [2023-08-30 20:14:22,740 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 46 transitions, 223 flow [2023-08-30 20:14:22,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:14:22,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:14:22,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 698 transitions. [2023-08-30 20:14:22,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577049180327869 [2023-08-30 20:14:22,747 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 698 transitions. [2023-08-30 20:14:22,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 698 transitions. [2023-08-30 20:14:22,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:14:22,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 698 transitions. [2023-08-30 20:14:22,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.6) internal successors, (698), 5 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:22,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:22,753 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:22,754 INFO L175 Difference]: Start difference. First operand has 21 places, 21 transitions, 61 flow. Second operand 5 states and 698 transitions. [2023-08-30 20:14:22,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 46 transitions, 223 flow [2023-08-30 20:14:22,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 46 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 20:14:22,756 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 85 flow [2023-08-30 20:14:22,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=85, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2023-08-30 20:14:22,757 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 5 predicate places. [2023-08-30 20:14:22,757 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 85 flow [2023-08-30 20:14:22,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 134.2) internal successors, (671), 5 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:22,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:14:22,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:14:22,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 20:14:22,759 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:14:22,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:14:22,761 INFO L85 PathProgramCache]: Analyzing trace with hash -940242461, now seen corresponding path program 1 times [2023-08-30 20:14:22,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:14:22,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264429700] [2023-08-30 20:14:22,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:14:22,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:14:22,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:22,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:14:22,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:14:22,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264429700] [2023-08-30 20:14:22,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264429700] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:14:22,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485067816] [2023-08-30 20:14:22,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:14:22,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:14:22,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:14:22,921 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:14:22,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 20:14:23,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:23,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:14:23,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:14:23,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:14:23,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 20:14:23,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485067816] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:14:23,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 20:14:23,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-08-30 20:14:23,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388516041] [2023-08-30 20:14:23,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:14:23,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 20:14:23,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:14:23,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 20:14:23,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-30 20:14:23,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-30 20:14:23,161 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 85 flow. Second operand has 4 states, 4 states have (on average 132.5) internal successors, (530), 4 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:23,161 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:14:23,162 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-30 20:14:23,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:14:23,297 INFO L130 PetriNetUnfolder]: 91/206 cut-off events. [2023-08-30 20:14:23,298 INFO L131 PetriNetUnfolder]: For 234/256 co-relation queries the response was YES. [2023-08-30 20:14:23,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 569 conditions, 206 events. 91/206 cut-off events. For 234/256 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 859 event pairs, 60 based on Foata normal form. 44/240 useless extension candidates. Maximal degree in co-relation 451. Up to 132 conditions per place. [2023-08-30 20:14:23,299 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 20 selfloop transitions, 2 changer transitions 23/47 dead transitions. [2023-08-30 20:14:23,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 47 transitions, 239 flow [2023-08-30 20:14:23,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:14:23,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:14:23,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 690 transitions. [2023-08-30 20:14:23,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4524590163934426 [2023-08-30 20:14:23,303 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 690 transitions. [2023-08-30 20:14:23,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 690 transitions. [2023-08-30 20:14:23,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:14:23,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 690 transitions. [2023-08-30 20:14:23,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 138.0) internal successors, (690), 5 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:23,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:23,309 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:23,309 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 85 flow. Second operand 5 states and 690 transitions. [2023-08-30 20:14:23,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 47 transitions, 239 flow [2023-08-30 20:14:23,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 47 transitions, 230 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 20:14:23,313 INFO L231 Difference]: Finished difference. Result has 31 places, 24 transitions, 98 flow [2023-08-30 20:14:23,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=98, PETRI_PLACES=31, PETRI_TRANSITIONS=24} [2023-08-30 20:14:23,314 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 9 predicate places. [2023-08-30 20:14:23,315 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 24 transitions, 98 flow [2023-08-30 20:14:23,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.5) internal successors, (530), 4 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:23,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:14:23,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:14:23,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 20:14:23,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:14:23,521 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:14:23,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:14:23,522 INFO L85 PathProgramCache]: Analyzing trace with hash 166324188, now seen corresponding path program 1 times [2023-08-30 20:14:23,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:14:23,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105793463] [2023-08-30 20:14:23,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:14:23,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:14:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:23,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:14:23,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:14:23,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105793463] [2023-08-30 20:14:23,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105793463] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:14:23,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:14:23,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:14:23,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761455812] [2023-08-30 20:14:23,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:14:23,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:14:23,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:14:23,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:14:23,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:14:23,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 305 [2023-08-30 20:14:23,643 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 133.4) internal successors, (667), 5 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:23,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:14:23,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 305 [2023-08-30 20:14:23,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:14:23,746 INFO L130 PetriNetUnfolder]: 114/218 cut-off events. [2023-08-30 20:14:23,747 INFO L131 PetriNetUnfolder]: For 239/239 co-relation queries the response was YES. [2023-08-30 20:14:23,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 635 conditions, 218 events. 114/218 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 695 event pairs, 40 based on Foata normal form. 6/223 useless extension candidates. Maximal degree in co-relation 618. Up to 133 conditions per place. [2023-08-30 20:14:23,748 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 38 selfloop transitions, 7 changer transitions 10/55 dead transitions. [2023-08-30 20:14:23,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 55 transitions, 335 flow [2023-08-30 20:14:23,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 20:14:23,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 20:14:23,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 828 transitions. [2023-08-30 20:14:23,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4524590163934426 [2023-08-30 20:14:23,752 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 828 transitions. [2023-08-30 20:14:23,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 828 transitions. [2023-08-30 20:14:23,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:14:23,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 828 transitions. [2023-08-30 20:14:23,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 138.0) internal successors, (828), 6 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:23,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 305.0) internal successors, (2135), 7 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:23,758 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 305.0) internal successors, (2135), 7 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:23,759 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 98 flow. Second operand 6 states and 828 transitions. [2023-08-30 20:14:23,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 55 transitions, 335 flow [2023-08-30 20:14:23,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 55 transitions, 317 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-30 20:14:23,761 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 150 flow [2023-08-30 20:14:23,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=150, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2023-08-30 20:14:23,762 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 14 predicate places. [2023-08-30 20:14:23,762 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 150 flow [2023-08-30 20:14:23,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 133.4) internal successors, (667), 5 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:23,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:14:23,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:14:23,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 20:14:23,763 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:14:23,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:14:23,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1772606940, now seen corresponding path program 2 times [2023-08-30 20:14:23,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:14:23,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101754700] [2023-08-30 20:14:23,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:14:23,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:14:23,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:23,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:14:23,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:14:23,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101754700] [2023-08-30 20:14:23,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101754700] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:14:23,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:14:23,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:14:23,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846559509] [2023-08-30 20:14:23,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:14:23,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:14:23,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:14:23,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:14:23,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:14:23,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 305 [2023-08-30 20:14:23,866 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 133.4) internal successors, (667), 5 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:23,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:14:23,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 305 [2023-08-30 20:14:23,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:14:23,956 INFO L130 PetriNetUnfolder]: 117/224 cut-off events. [2023-08-30 20:14:23,956 INFO L131 PetriNetUnfolder]: For 346/346 co-relation queries the response was YES. [2023-08-30 20:14:23,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 810 conditions, 224 events. 117/224 cut-off events. For 346/346 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 743 event pairs, 38 based on Foata normal form. 4/226 useless extension candidates. Maximal degree in co-relation 786. Up to 125 conditions per place. [2023-08-30 20:14:23,958 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 45 selfloop transitions, 9 changer transitions 1/55 dead transitions. [2023-08-30 20:14:23,958 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 55 transitions, 371 flow [2023-08-30 20:14:23,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:14:23,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:14:23,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 698 transitions. [2023-08-30 20:14:23,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577049180327869 [2023-08-30 20:14:23,961 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 698 transitions. [2023-08-30 20:14:23,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 698 transitions. [2023-08-30 20:14:23,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:14:23,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 698 transitions. [2023-08-30 20:14:23,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.6) internal successors, (698), 5 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:23,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:23,965 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:23,965 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 150 flow. Second operand 5 states and 698 transitions. [2023-08-30 20:14:23,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 55 transitions, 371 flow [2023-08-30 20:14:23,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 55 transitions, 341 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-08-30 20:14:23,969 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 185 flow [2023-08-30 20:14:23,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=185, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2023-08-30 20:14:23,969 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 17 predicate places. [2023-08-30 20:14:23,970 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 185 flow [2023-08-30 20:14:23,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 133.4) internal successors, (667), 5 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:23,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:14:23,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:14:23,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 20:14:23,971 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:14:23,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:14:23,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1182769632, now seen corresponding path program 1 times [2023-08-30 20:14:23,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:14:23,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056811590] [2023-08-30 20:14:23,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:14:23,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:14:23,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:24,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:14:24,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:14:24,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056811590] [2023-08-30 20:14:24,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056811590] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:14:24,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9582651] [2023-08-30 20:14:24,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:14:24,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:14:24,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:14:24,039 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:14:24,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 20:14:24,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:24,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:14:24,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:14:24,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:14:24,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 20:14:24,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9582651] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:14:24,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 20:14:24,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-08-30 20:14:24,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317223105] [2023-08-30 20:14:24,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:14:24,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 20:14:24,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:14:24,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 20:14:24,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-30 20:14:24,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-30 20:14:24,224 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 185 flow. Second operand has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:24,224 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:14:24,224 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-30 20:14:24,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:14:24,307 INFO L130 PetriNetUnfolder]: 119/249 cut-off events. [2023-08-30 20:14:24,308 INFO L131 PetriNetUnfolder]: For 633/648 co-relation queries the response was YES. [2023-08-30 20:14:24,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 907 conditions, 249 events. 119/249 cut-off events. For 633/648 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 968 event pairs, 67 based on Foata normal form. 22/256 useless extension candidates. Maximal degree in co-relation 882. Up to 202 conditions per place. [2023-08-30 20:14:24,310 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 28 selfloop transitions, 2 changer transitions 10/44 dead transitions. [2023-08-30 20:14:24,310 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 44 transitions, 303 flow [2023-08-30 20:14:24,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 20:14:24,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 20:14:24,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 546 transitions. [2023-08-30 20:14:24,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44754098360655736 [2023-08-30 20:14:24,312 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 546 transitions. [2023-08-30 20:14:24,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 546 transitions. [2023-08-30 20:14:24,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:14:24,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 546 transitions. [2023-08-30 20:14:24,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 136.5) internal successors, (546), 4 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:24,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 305.0) internal successors, (1525), 5 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:24,315 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 305.0) internal successors, (1525), 5 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:24,316 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 185 flow. Second operand 4 states and 546 transitions. [2023-08-30 20:14:24,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 44 transitions, 303 flow [2023-08-30 20:14:24,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 44 transitions, 296 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 20:14:24,318 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 202 flow [2023-08-30 20:14:24,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=202, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2023-08-30 20:14:24,319 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 21 predicate places. [2023-08-30 20:14:24,319 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 202 flow [2023-08-30 20:14:24,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:24,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:14:24,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:14:24,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 20:14:24,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-30 20:14:24,525 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:14:24,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:14:24,526 INFO L85 PathProgramCache]: Analyzing trace with hash -919263952, now seen corresponding path program 1 times [2023-08-30 20:14:24,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:14:24,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816742587] [2023-08-30 20:14:24,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:14:24,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:14:24,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:24,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:14:24,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:14:24,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816742587] [2023-08-30 20:14:24,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816742587] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:14:24,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:14:24,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:14:24,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31201269] [2023-08-30 20:14:24,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:14:24,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:14:24,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:14:24,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:14:24,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:14:24,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 305 [2023-08-30 20:14:24,635 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 202 flow. Second operand has 5 states, 5 states have (on average 133.6) internal successors, (668), 5 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:24,635 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:14:24,635 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 305 [2023-08-30 20:14:24,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:14:24,726 INFO L130 PetriNetUnfolder]: 105/203 cut-off events. [2023-08-30 20:14:24,726 INFO L131 PetriNetUnfolder]: For 383/383 co-relation queries the response was YES. [2023-08-30 20:14:24,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 761 conditions, 203 events. 105/203 cut-off events. For 383/383 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 643 event pairs, 36 based on Foata normal form. 6/208 useless extension candidates. Maximal degree in co-relation 733. Up to 124 conditions per place. [2023-08-30 20:14:24,728 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 35 selfloop transitions, 9 changer transitions 8/52 dead transitions. [2023-08-30 20:14:24,728 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 52 transitions, 381 flow [2023-08-30 20:14:24,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:14:24,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:14:24,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 694 transitions. [2023-08-30 20:14:24,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4550819672131148 [2023-08-30 20:14:24,731 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 694 transitions. [2023-08-30 20:14:24,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 694 transitions. [2023-08-30 20:14:24,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:14:24,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 694 transitions. [2023-08-30 20:14:24,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 138.8) internal successors, (694), 5 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:24,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:24,737 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:24,737 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 202 flow. Second operand 5 states and 694 transitions. [2023-08-30 20:14:24,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 52 transitions, 381 flow [2023-08-30 20:14:24,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 365 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-30 20:14:24,750 INFO L231 Difference]: Finished difference. Result has 45 places, 34 transitions, 211 flow [2023-08-30 20:14:24,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=211, PETRI_PLACES=45, PETRI_TRANSITIONS=34} [2023-08-30 20:14:24,751 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 23 predicate places. [2023-08-30 20:14:24,752 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 34 transitions, 211 flow [2023-08-30 20:14:24,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 133.6) internal successors, (668), 5 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:24,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:14:24,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:14:24,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 20:14:24,753 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:14:24,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:14:24,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1922624012, now seen corresponding path program 2 times [2023-08-30 20:14:24,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:14:24,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562431858] [2023-08-30 20:14:24,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:14:24,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:14:24,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:24,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:14:24,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:14:24,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562431858] [2023-08-30 20:14:24,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562431858] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:14:24,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926937445] [2023-08-30 20:14:24,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:14:24,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:14:24,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:14:24,834 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:14:24,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 20:14:24,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:14:24,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:14:24,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 20:14:24,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:14:24,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:14:24,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:14:25,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:14:25,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926937445] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:14:25,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:14:25,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-30 20:14:25,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604836751] [2023-08-30 20:14:25,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:14:25,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 20:14:25,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:14:25,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 20:14:25,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 20:14:25,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-30 20:14:25,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 34 transitions, 211 flow. Second operand has 8 states, 8 states have (on average 132.0) internal successors, (1056), 8 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:25,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:14:25,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-30 20:14:25,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:14:25,162 INFO L130 PetriNetUnfolder]: 104/195 cut-off events. [2023-08-30 20:14:25,162 INFO L131 PetriNetUnfolder]: For 436/436 co-relation queries the response was YES. [2023-08-30 20:14:25,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 771 conditions, 195 events. 104/195 cut-off events. For 436/436 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 567 event pairs, 16 based on Foata normal form. 4/198 useless extension candidates. Maximal degree in co-relation 743. Up to 92 conditions per place. [2023-08-30 20:14:25,164 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 43 selfloop transitions, 8 changer transitions 1/52 dead transitions. [2023-08-30 20:14:25,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 52 transitions, 402 flow [2023-08-30 20:14:25,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:14:25,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:14:25,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 685 transitions. [2023-08-30 20:14:25,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4491803278688525 [2023-08-30 20:14:25,166 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 685 transitions. [2023-08-30 20:14:25,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 685 transitions. [2023-08-30 20:14:25,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:14:25,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 685 transitions. [2023-08-30 20:14:25,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:25,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:25,193 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:25,193 INFO L175 Difference]: Start difference. First operand has 45 places, 34 transitions, 211 flow. Second operand 5 states and 685 transitions. [2023-08-30 20:14:25,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 52 transitions, 402 flow [2023-08-30 20:14:25,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 52 transitions, 372 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 20:14:25,196 INFO L231 Difference]: Finished difference. Result has 47 places, 36 transitions, 233 flow [2023-08-30 20:14:25,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=233, PETRI_PLACES=47, PETRI_TRANSITIONS=36} [2023-08-30 20:14:25,196 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 25 predicate places. [2023-08-30 20:14:25,197 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 36 transitions, 233 flow [2023-08-30 20:14:25,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 132.0) internal successors, (1056), 8 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:25,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:14:25,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:14:25,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 20:14:25,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:14:25,404 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:14:25,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:14:25,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1388345664, now seen corresponding path program 1 times [2023-08-30 20:14:25,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:14:25,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017304630] [2023-08-30 20:14:25,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:14:25,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:14:25,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:25,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:14:25,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:14:25,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017304630] [2023-08-30 20:14:25,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017304630] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:14:25,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986329700] [2023-08-30 20:14:25,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:14:25,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:14:25,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:14:25,483 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:14:25,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 20:14:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:25,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 20:14:25,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:14:25,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:14:25,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:14:25,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:14:25,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986329700] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:14:25,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:14:25,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-30 20:14:25,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614940979] [2023-08-30 20:14:25,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:14:25,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 20:14:25,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:14:25,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 20:14:25,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 20:14:25,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-30 20:14:25,670 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 36 transitions, 233 flow. Second operand has 8 states, 8 states have (on average 132.125) internal successors, (1057), 8 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:25,670 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:14:25,670 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-30 20:14:25,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:14:25,789 INFO L130 PetriNetUnfolder]: 112/209 cut-off events. [2023-08-30 20:14:25,789 INFO L131 PetriNetUnfolder]: For 474/474 co-relation queries the response was YES. [2023-08-30 20:14:25,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 826 conditions, 209 events. 112/209 cut-off events. For 474/474 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 624 event pairs, 20 based on Foata normal form. 6/214 useless extension candidates. Maximal degree in co-relation 796. Up to 102 conditions per place. [2023-08-30 20:14:25,791 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 46 selfloop transitions, 11 changer transitions 1/58 dead transitions. [2023-08-30 20:14:25,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 58 transitions, 437 flow [2023-08-30 20:14:25,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:14:25,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:14:25,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 689 transitions. [2023-08-30 20:14:25,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4518032786885246 [2023-08-30 20:14:25,793 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 689 transitions. [2023-08-30 20:14:25,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 689 transitions. [2023-08-30 20:14:25,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:14:25,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 689 transitions. [2023-08-30 20:14:25,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:25,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:25,799 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:25,799 INFO L175 Difference]: Start difference. First operand has 47 places, 36 transitions, 233 flow. Second operand 5 states and 689 transitions. [2023-08-30 20:14:25,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 58 transitions, 437 flow [2023-08-30 20:14:25,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 58 transitions, 424 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 20:14:25,802 INFO L231 Difference]: Finished difference. Result has 51 places, 38 transitions, 273 flow [2023-08-30 20:14:25,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=273, PETRI_PLACES=51, PETRI_TRANSITIONS=38} [2023-08-30 20:14:25,803 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 29 predicate places. [2023-08-30 20:14:25,804 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 38 transitions, 273 flow [2023-08-30 20:14:25,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 132.125) internal successors, (1057), 8 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:25,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:14:25,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:14:25,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 20:14:26,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:14:26,010 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:14:26,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:14:26,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1906605968, now seen corresponding path program 2 times [2023-08-30 20:14:26,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:14:26,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671906589] [2023-08-30 20:14:26,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:14:26,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:14:26,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:26,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:14:26,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:14:26,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671906589] [2023-08-30 20:14:26,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671906589] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:14:26,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695649969] [2023-08-30 20:14:26,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:14:26,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:14:26,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:14:26,113 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:14:26,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 20:14:26,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:14:26,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:14:26,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 20:14:26,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:14:26,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:14:26,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:14:26,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:14:26,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695649969] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:14:26,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:14:26,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-30 20:14:26,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035696768] [2023-08-30 20:14:26,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:14:26,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 20:14:26,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:14:26,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 20:14:26,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 20:14:26,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-30 20:14:26,299 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 273 flow. Second operand has 10 states, 10 states have (on average 131.7) internal successors, (1317), 10 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:26,299 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:14:26,299 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-30 20:14:26,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:14:26,452 INFO L130 PetriNetUnfolder]: 128/237 cut-off events. [2023-08-30 20:14:26,452 INFO L131 PetriNetUnfolder]: For 733/733 co-relation queries the response was YES. [2023-08-30 20:14:26,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 994 conditions, 237 events. 128/237 cut-off events. For 733/733 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 746 event pairs, 20 based on Foata normal form. 6/242 useless extension candidates. Maximal degree in co-relation 962. Up to 112 conditions per place. [2023-08-30 20:14:26,454 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 54 selfloop transitions, 16 changer transitions 1/71 dead transitions. [2023-08-30 20:14:26,454 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 544 flow [2023-08-30 20:14:26,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 20:14:26,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 20:14:26,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1091 transitions. [2023-08-30 20:14:26,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4471311475409836 [2023-08-30 20:14:26,458 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1091 transitions. [2023-08-30 20:14:26,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1091 transitions. [2023-08-30 20:14:26,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:14:26,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1091 transitions. [2023-08-30 20:14:26,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 136.375) internal successors, (1091), 8 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:26,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 305.0) internal successors, (2745), 9 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:26,465 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 305.0) internal successors, (2745), 9 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:26,465 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 273 flow. Second operand 8 states and 1091 transitions. [2023-08-30 20:14:26,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 544 flow [2023-08-30 20:14:26,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 71 transitions, 530 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 20:14:26,470 INFO L231 Difference]: Finished difference. Result has 58 places, 41 transitions, 326 flow [2023-08-30 20:14:26,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=326, PETRI_PLACES=58, PETRI_TRANSITIONS=41} [2023-08-30 20:14:26,472 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 36 predicate places. [2023-08-30 20:14:26,472 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 41 transitions, 326 flow [2023-08-30 20:14:26,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 131.7) internal successors, (1317), 10 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:26,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:14:26,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:14:26,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-30 20:14:26,677 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 [2023-08-30 20:14:26,678 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:14:26,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:14:26,678 INFO L85 PathProgramCache]: Analyzing trace with hash 694440902, now seen corresponding path program 3 times [2023-08-30 20:14:26,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:14:26,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297267488] [2023-08-30 20:14:26,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:14:26,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:14:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:26,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:14:26,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:14:26,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297267488] [2023-08-30 20:14:26,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297267488] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:14:26,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:14:26,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:14:26,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446660782] [2023-08-30 20:14:26,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:14:26,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:14:26,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:14:26,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:14:26,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:14:26,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 305 [2023-08-30 20:14:26,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 41 transitions, 326 flow. Second operand has 5 states, 5 states have (on average 133.6) internal successors, (668), 5 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:26,794 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:14:26,794 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 305 [2023-08-30 20:14:26,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:14:26,886 INFO L130 PetriNetUnfolder]: 118/217 cut-off events. [2023-08-30 20:14:26,886 INFO L131 PetriNetUnfolder]: For 909/909 co-relation queries the response was YES. [2023-08-30 20:14:26,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1004 conditions, 217 events. 118/217 cut-off events. For 909/909 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 643 event pairs, 36 based on Foata normal form. 4/220 useless extension candidates. Maximal degree in co-relation 970. Up to 140 conditions per place. [2023-08-30 20:14:26,888 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 38 selfloop transitions, 13 changer transitions 1/52 dead transitions. [2023-08-30 20:14:26,888 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 52 transitions, 470 flow [2023-08-30 20:14:26,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:14:26,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:14:26,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 687 transitions. [2023-08-30 20:14:26,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45049180327868854 [2023-08-30 20:14:26,891 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 687 transitions. [2023-08-30 20:14:26,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 687 transitions. [2023-08-30 20:14:26,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:14:26,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 687 transitions. [2023-08-30 20:14:26,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 137.4) internal successors, (687), 5 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:26,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:26,895 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:26,896 INFO L175 Difference]: Start difference. First operand has 58 places, 41 transitions, 326 flow. Second operand 5 states and 687 transitions. [2023-08-30 20:14:26,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 52 transitions, 470 flow [2023-08-30 20:14:26,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 52 transitions, 436 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-30 20:14:26,900 INFO L231 Difference]: Finished difference. Result has 57 places, 40 transitions, 304 flow [2023-08-30 20:14:26,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=304, PETRI_PLACES=57, PETRI_TRANSITIONS=40} [2023-08-30 20:14:26,901 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 35 predicate places. [2023-08-30 20:14:26,901 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 40 transitions, 304 flow [2023-08-30 20:14:26,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 133.6) internal successors, (668), 5 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:26,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:14:26,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:14:26,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 20:14:26,903 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:14:26,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:14:26,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1217746086, now seen corresponding path program 3 times [2023-08-30 20:14:26,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:14:26,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066595423] [2023-08-30 20:14:26,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:14:26,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:14:26,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:26,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:14:26,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:14:26,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066595423] [2023-08-30 20:14:26,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066595423] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:14:26,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:14:26,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:14:26,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438542331] [2023-08-30 20:14:26,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:14:26,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:14:26,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:14:26,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:14:26,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:14:26,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 305 [2023-08-30 20:14:26,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 40 transitions, 304 flow. Second operand has 5 states, 5 states have (on average 133.6) internal successors, (668), 5 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:26,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:14:26,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 305 [2023-08-30 20:14:26,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:14:27,090 INFO L130 PetriNetUnfolder]: 107/192 cut-off events. [2023-08-30 20:14:27,091 INFO L131 PetriNetUnfolder]: For 759/759 co-relation queries the response was YES. [2023-08-30 20:14:27,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 873 conditions, 192 events. 107/192 cut-off events. For 759/759 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 547 event pairs, 31 based on Foata normal form. 6/197 useless extension candidates. Maximal degree in co-relation 839. Up to 139 conditions per place. [2023-08-30 20:14:27,092 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 38 selfloop transitions, 12 changer transitions 1/51 dead transitions. [2023-08-30 20:14:27,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 51 transitions, 446 flow [2023-08-30 20:14:27,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:14:27,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:14:27,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 687 transitions. [2023-08-30 20:14:27,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45049180327868854 [2023-08-30 20:14:27,095 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 687 transitions. [2023-08-30 20:14:27,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 687 transitions. [2023-08-30 20:14:27,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:14:27,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 687 transitions. [2023-08-30 20:14:27,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 137.4) internal successors, (687), 5 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:27,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:27,100 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:27,100 INFO L175 Difference]: Start difference. First operand has 57 places, 40 transitions, 304 flow. Second operand 5 states and 687 transitions. [2023-08-30 20:14:27,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 51 transitions, 446 flow [2023-08-30 20:14:27,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 51 transitions, 405 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-08-30 20:14:27,103 INFO L231 Difference]: Finished difference. Result has 53 places, 39 transitions, 275 flow [2023-08-30 20:14:27,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=275, PETRI_PLACES=53, PETRI_TRANSITIONS=39} [2023-08-30 20:14:27,105 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 31 predicate places. [2023-08-30 20:14:27,105 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 39 transitions, 275 flow [2023-08-30 20:14:27,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 133.6) internal successors, (668), 5 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:27,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:14:27,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:14:27,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 20:14:27,106 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:14:27,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:14:27,107 INFO L85 PathProgramCache]: Analyzing trace with hash -813997192, now seen corresponding path program 1 times [2023-08-30 20:14:27,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:14:27,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59161915] [2023-08-30 20:14:27,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:14:27,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:14:27,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:27,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:14:27,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:14:27,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59161915] [2023-08-30 20:14:27,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59161915] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:14:27,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434898538] [2023-08-30 20:14:27,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:14:27,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:14:27,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:14:27,357 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:14:27,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 20:14:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:27,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 20:14:27,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:14:27,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2023-08-30 20:14:27,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:14:27,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:14:27,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2023-08-30 20:14:27,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:14:27,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434898538] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:14:27,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:14:27,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2023-08-30 20:14:27,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757490185] [2023-08-30 20:14:27,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:14:27,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 20:14:27,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:14:27,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 20:14:27,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-08-30 20:14:27,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 305 [2023-08-30 20:14:27,756 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 39 transitions, 275 flow. Second operand has 11 states, 11 states have (on average 120.45454545454545) internal successors, (1325), 11 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:27,757 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:14:27,757 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 305 [2023-08-30 20:14:27,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:14:27,947 INFO L130 PetriNetUnfolder]: 265/474 cut-off events. [2023-08-30 20:14:27,947 INFO L131 PetriNetUnfolder]: For 1330/1375 co-relation queries the response was YES. [2023-08-30 20:14:27,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1983 conditions, 474 events. 265/474 cut-off events. For 1330/1375 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1919 event pairs, 25 based on Foata normal form. 25/481 useless extension candidates. Maximal degree in co-relation 1423. Up to 197 conditions per place. [2023-08-30 20:14:27,951 INFO L137 encePairwiseOnDemand]: 298/305 looper letters, 63 selfloop transitions, 31 changer transitions 5/105 dead transitions. [2023-08-30 20:14:27,951 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 105 transitions, 836 flow [2023-08-30 20:14:27,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 20:14:27,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 20:14:27,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1011 transitions. [2023-08-30 20:14:27,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.414344262295082 [2023-08-30 20:14:27,962 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1011 transitions. [2023-08-30 20:14:27,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1011 transitions. [2023-08-30 20:14:27,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:14:27,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1011 transitions. [2023-08-30 20:14:27,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 126.375) internal successors, (1011), 8 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:27,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 305.0) internal successors, (2745), 9 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:27,969 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 305.0) internal successors, (2745), 9 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:27,969 INFO L175 Difference]: Start difference. First operand has 53 places, 39 transitions, 275 flow. Second operand 8 states and 1011 transitions. [2023-08-30 20:14:27,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 105 transitions, 836 flow [2023-08-30 20:14:27,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 105 transitions, 760 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-08-30 20:14:27,974 INFO L231 Difference]: Finished difference. Result has 57 places, 67 transitions, 594 flow [2023-08-30 20:14:27,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=594, PETRI_PLACES=57, PETRI_TRANSITIONS=67} [2023-08-30 20:14:27,975 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 35 predicate places. [2023-08-30 20:14:27,975 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 67 transitions, 594 flow [2023-08-30 20:14:27,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 120.45454545454545) internal successors, (1325), 11 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:27,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:14:27,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:14:27,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-30 20:14:28,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:14:28,181 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:14:28,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:14:28,182 INFO L85 PathProgramCache]: Analyzing trace with hash 585031802, now seen corresponding path program 2 times [2023-08-30 20:14:28,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:14:28,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227431838] [2023-08-30 20:14:28,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:14:28,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:14:28,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:28,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:14:28,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:14:28,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227431838] [2023-08-30 20:14:28,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227431838] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:14:28,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856481043] [2023-08-30 20:14:28,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:14:28,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:14:28,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:14:28,410 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:14:28,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 20:14:28,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:14:28,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:14:28,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 20:14:28,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:14:28,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2023-08-30 20:14:28,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:14:28,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:14:28,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2023-08-30 20:14:28,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:14:28,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856481043] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:14:28,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:14:28,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2023-08-30 20:14:28,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727794306] [2023-08-30 20:14:28,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:14:28,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 20:14:28,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:14:28,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 20:14:28,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-08-30 20:14:28,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 305 [2023-08-30 20:14:28,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 67 transitions, 594 flow. Second operand has 11 states, 11 states have (on average 120.45454545454545) internal successors, (1325), 11 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:28,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:14:28,822 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 305 [2023-08-30 20:14:28,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:14:29,096 INFO L130 PetriNetUnfolder]: 651/1159 cut-off events. [2023-08-30 20:14:29,096 INFO L131 PetriNetUnfolder]: For 4169/4249 co-relation queries the response was YES. [2023-08-30 20:14:29,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5153 conditions, 1159 events. 651/1159 cut-off events. For 4169/4249 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5920 event pairs, 108 based on Foata normal form. 47/1170 useless extension candidates. Maximal degree in co-relation 3372. Up to 479 conditions per place. [2023-08-30 20:14:29,104 INFO L137 encePairwiseOnDemand]: 298/305 looper letters, 83 selfloop transitions, 49 changer transitions 20/158 dead transitions. [2023-08-30 20:14:29,104 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 158 transitions, 1626 flow [2023-08-30 20:14:29,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 20:14:29,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 20:14:29,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1005 transitions. [2023-08-30 20:14:29,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41188524590163933 [2023-08-30 20:14:29,107 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1005 transitions. [2023-08-30 20:14:29,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1005 transitions. [2023-08-30 20:14:29,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:14:29,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1005 transitions. [2023-08-30 20:14:29,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 125.625) internal successors, (1005), 8 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:29,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 305.0) internal successors, (2745), 9 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:29,114 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 305.0) internal successors, (2745), 9 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:29,114 INFO L175 Difference]: Start difference. First operand has 57 places, 67 transitions, 594 flow. Second operand 8 states and 1005 transitions. [2023-08-30 20:14:29,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 158 transitions, 1626 flow [2023-08-30 20:14:29,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 158 transitions, 1568 flow, removed 28 selfloop flow, removed 1 redundant places. [2023-08-30 20:14:29,126 INFO L231 Difference]: Finished difference. Result has 68 places, 105 transitions, 1193 flow [2023-08-30 20:14:29,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=564, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1193, PETRI_PLACES=68, PETRI_TRANSITIONS=105} [2023-08-30 20:14:29,126 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 46 predicate places. [2023-08-30 20:14:29,127 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 105 transitions, 1193 flow [2023-08-30 20:14:29,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 120.45454545454545) internal successors, (1325), 11 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:29,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:14:29,128 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:14:29,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 20:14:29,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:14:29,333 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:14:29,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:14:29,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1194162893, now seen corresponding path program 3 times [2023-08-30 20:14:29,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:14:29,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492724029] [2023-08-30 20:14:29,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:14:29,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:14:29,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:29,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:14:29,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:14:29,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492724029] [2023-08-30 20:14:29,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492724029] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:14:29,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091752981] [2023-08-30 20:14:29,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:14:29,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:14:29,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:14:29,857 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) [2023-08-30 20:14:29,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 20:14:29,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:14:29,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:14:29,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 20:14:29,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:14:30,052 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 [2023-08-30 20:14:30,092 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 [2023-08-30 20:14:30,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:14:30,198 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-30 20:14:30,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 41 [2023-08-30 20:14:30,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-08-30 20:14:30,290 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-30 20:14:30,290 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-08-30 20:14:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:14:30,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:14:30,600 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:14:30,601 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 132 treesize of output 84 [2023-08-30 20:14:30,640 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:14:30,640 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 228 treesize of output 277 [2023-08-30 20:14:30,689 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:14:30,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 184 treesize of output 215 [2023-08-30 20:14:30,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2023-08-30 20:14:36,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:14:36,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091752981] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:14:36,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:14:36,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-08-30 20:14:36,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588337674] [2023-08-30 20:14:36,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:14:36,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 20:14:36,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:14:36,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 20:14:36,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=349, Unknown=1, NotChecked=0, Total=420 [2023-08-30 20:14:38,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:14:38,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 305 [2023-08-30 20:14:38,799 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 105 transitions, 1193 flow. Second operand has 21 states, 21 states have (on average 92.14285714285714) internal successors, (1935), 21 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:38,800 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:14:38,800 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 305 [2023-08-30 20:14:38,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:14:39,509 INFO L130 PetriNetUnfolder]: 718/1290 cut-off events. [2023-08-30 20:14:39,510 INFO L131 PetriNetUnfolder]: For 6344/6426 co-relation queries the response was YES. [2023-08-30 20:14:39,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6248 conditions, 1290 events. 718/1290 cut-off events. For 6344/6426 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 6847 event pairs, 123 based on Foata normal form. 50/1318 useless extension candidates. Maximal degree in co-relation 4513. Up to 662 conditions per place. [2023-08-30 20:14:39,519 INFO L137 encePairwiseOnDemand]: 297/305 looper letters, 78 selfloop transitions, 50 changer transitions 31/165 dead transitions. [2023-08-30 20:14:39,520 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 165 transitions, 1947 flow [2023-08-30 20:14:39,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 20:14:39,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 20:14:39,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 966 transitions. [2023-08-30 20:14:39,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31672131147540983 [2023-08-30 20:14:39,523 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 966 transitions. [2023-08-30 20:14:39,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 966 transitions. [2023-08-30 20:14:39,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:14:39,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 966 transitions. [2023-08-30 20:14:39,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 96.6) internal successors, (966), 10 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:39,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 305.0) internal successors, (3355), 11 states have internal predecessors, (3355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:39,530 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 305.0) internal successors, (3355), 11 states have internal predecessors, (3355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:39,530 INFO L175 Difference]: Start difference. First operand has 68 places, 105 transitions, 1193 flow. Second operand 10 states and 966 transitions. [2023-08-30 20:14:39,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 165 transitions, 1947 flow [2023-08-30 20:14:39,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 165 transitions, 1894 flow, removed 25 selfloop flow, removed 1 redundant places. [2023-08-30 20:14:39,546 INFO L231 Difference]: Finished difference. Result has 79 places, 113 transitions, 1396 flow [2023-08-30 20:14:39,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=1146, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1396, PETRI_PLACES=79, PETRI_TRANSITIONS=113} [2023-08-30 20:14:39,547 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 57 predicate places. [2023-08-30 20:14:39,547 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 113 transitions, 1396 flow [2023-08-30 20:14:39,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 92.14285714285714) internal successors, (1935), 21 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:39,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:14:39,549 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:14:39,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 20:14:39,754 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,SelfDestructingSolverStorable14 [2023-08-30 20:14:39,754 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:14:39,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:14:39,755 INFO L85 PathProgramCache]: Analyzing trace with hash 888256042, now seen corresponding path program 4 times [2023-08-30 20:14:39,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:14:39,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478717892] [2023-08-30 20:14:39,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:14:39,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:14:39,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:39,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:14:39,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:14:39,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478717892] [2023-08-30 20:14:39,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478717892] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:14:39,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621451406] [2023-08-30 20:14:39,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:14:39,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:14:39,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:14:39,859 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) [2023-08-30 20:14:39,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 20:14:39,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:14:39,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:14:39,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:14:39,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:14:40,007 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:14:40,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:14:40,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:14:40,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621451406] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:14:40,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:14:40,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-30 20:14:40,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175189921] [2023-08-30 20:14:40,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:14:40,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 20:14:40,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:14:40,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 20:14:40,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-30 20:14:40,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-30 20:14:40,092 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 113 transitions, 1396 flow. Second operand has 12 states, 12 states have (on average 131.58333333333334) internal successors, (1579), 12 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:40,092 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:14:40,092 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-30 20:14:40,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:14:40,613 INFO L130 PetriNetUnfolder]: 877/1639 cut-off events. [2023-08-30 20:14:40,613 INFO L131 PetriNetUnfolder]: For 7648/7648 co-relation queries the response was YES. [2023-08-30 20:14:40,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7955 conditions, 1639 events. 877/1639 cut-off events. For 7648/7648 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 9267 event pairs, 22 based on Foata normal form. 32/1669 useless extension candidates. Maximal degree in co-relation 7782. Up to 665 conditions per place. [2023-08-30 20:14:40,626 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 157 selfloop transitions, 105 changer transitions 23/285 dead transitions. [2023-08-30 20:14:40,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 285 transitions, 3529 flow [2023-08-30 20:14:40,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 20:14:40,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 20:14:40,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2699 transitions. [2023-08-30 20:14:40,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44245901639344265 [2023-08-30 20:14:40,641 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2699 transitions. [2023-08-30 20:14:40,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2699 transitions. [2023-08-30 20:14:40,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:14:40,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2699 transitions. [2023-08-30 20:14:40,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 134.95) internal successors, (2699), 20 states have internal predecessors, (2699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:40,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 305.0) internal successors, (6405), 21 states have internal predecessors, (6405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:40,661 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 305.0) internal successors, (6405), 21 states have internal predecessors, (6405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:40,661 INFO L175 Difference]: Start difference. First operand has 79 places, 113 transitions, 1396 flow. Second operand 20 states and 2699 transitions. [2023-08-30 20:14:40,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 285 transitions, 3529 flow [2023-08-30 20:14:40,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 285 transitions, 3259 flow, removed 115 selfloop flow, removed 5 redundant places. [2023-08-30 20:14:40,691 INFO L231 Difference]: Finished difference. Result has 103 places, 180 transitions, 2340 flow [2023-08-30 20:14:40,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=1256, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2340, PETRI_PLACES=103, PETRI_TRANSITIONS=180} [2023-08-30 20:14:40,692 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 81 predicate places. [2023-08-30 20:14:40,692 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 180 transitions, 2340 flow [2023-08-30 20:14:40,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 131.58333333333334) internal successors, (1579), 12 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:40,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:14:40,693 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:14:40,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 20:14:40,900 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,SelfDestructingSolverStorable15 [2023-08-30 20:14:40,900 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:14:40,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:14:40,901 INFO L85 PathProgramCache]: Analyzing trace with hash -91606092, now seen corresponding path program 5 times [2023-08-30 20:14:40,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:14:40,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219120648] [2023-08-30 20:14:40,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:14:40,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:14:40,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:40,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:14:40,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:14:40,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219120648] [2023-08-30 20:14:40,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219120648] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:14:40,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758258194] [2023-08-30 20:14:40,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:14:40,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:14:40,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:14:40,989 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) [2023-08-30 20:14:41,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 20:14:41,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 20:14:41,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:14:41,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:14:41,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:14:41,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:14:41,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:14:41,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:14:41,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758258194] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:14:41,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:14:41,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-30 20:14:41,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005578068] [2023-08-30 20:14:41,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:14:41,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 20:14:41,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:14:41,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 20:14:41,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-08-30 20:14:41,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-30 20:14:41,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 180 transitions, 2340 flow. Second operand has 12 states, 12 states have (on average 131.33333333333334) internal successors, (1576), 12 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:41,239 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:14:41,239 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-30 20:14:41,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:14:41,711 INFO L130 PetriNetUnfolder]: 776/1509 cut-off events. [2023-08-30 20:14:41,711 INFO L131 PetriNetUnfolder]: For 13435/13435 co-relation queries the response was YES. [2023-08-30 20:14:41,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9109 conditions, 1509 events. 776/1509 cut-off events. For 13435/13435 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 8818 event pairs, 96 based on Foata normal form. 64/1571 useless extension candidates. Maximal degree in co-relation 8613. Up to 762 conditions per place. [2023-08-30 20:14:41,725 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 157 selfloop transitions, 95 changer transitions 1/253 dead transitions. [2023-08-30 20:14:41,726 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 253 transitions, 3517 flow [2023-08-30 20:14:41,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 20:14:41,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 20:14:41,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1904 transitions. [2023-08-30 20:14:41,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4459016393442623 [2023-08-30 20:14:41,729 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1904 transitions. [2023-08-30 20:14:41,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1904 transitions. [2023-08-30 20:14:41,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:14:41,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1904 transitions. [2023-08-30 20:14:41,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 136.0) internal successors, (1904), 14 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:41,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 305.0) internal successors, (4575), 15 states have internal predecessors, (4575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:41,737 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 305.0) internal successors, (4575), 15 states have internal predecessors, (4575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:41,738 INFO L175 Difference]: Start difference. First operand has 103 places, 180 transitions, 2340 flow. Second operand 14 states and 1904 transitions. [2023-08-30 20:14:41,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 253 transitions, 3517 flow [2023-08-30 20:14:41,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 253 transitions, 3118 flow, removed 170 selfloop flow, removed 5 redundant places. [2023-08-30 20:14:41,786 INFO L231 Difference]: Finished difference. Result has 115 places, 186 transitions, 2378 flow [2023-08-30 20:14:41,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=2007, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2378, PETRI_PLACES=115, PETRI_TRANSITIONS=186} [2023-08-30 20:14:41,786 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 93 predicate places. [2023-08-30 20:14:41,786 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 186 transitions, 2378 flow [2023-08-30 20:14:41,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 131.33333333333334) internal successors, (1576), 12 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:41,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:14:41,787 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:14:41,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 20:14:41,992 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,SelfDestructingSolverStorable16 [2023-08-30 20:14:41,993 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:14:41,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:14:41,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1082840516, now seen corresponding path program 6 times [2023-08-30 20:14:41,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:14:41,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156971107] [2023-08-30 20:14:41,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:14:41,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:14:42,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:42,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:14:42,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:14:42,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156971107] [2023-08-30 20:14:42,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156971107] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:14:42,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612770864] [2023-08-30 20:14:42,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:14:42,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:14:42,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:14:42,106 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) [2023-08-30 20:14:42,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 20:14:42,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 20:14:42,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:14:42,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:14:42,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:14:42,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:14:42,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:14:42,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:14:42,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612770864] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:14:42,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:14:42,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-30 20:14:42,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999280865] [2023-08-30 20:14:42,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:14:42,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 20:14:42,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:14:42,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 20:14:42,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-08-30 20:14:42,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-30 20:14:42,354 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 186 transitions, 2378 flow. Second operand has 15 states, 15 states have (on average 131.0) internal successors, (1965), 15 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:42,354 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:14:42,354 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-30 20:14:42,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:14:43,026 INFO L130 PetriNetUnfolder]: 986/1971 cut-off events. [2023-08-30 20:14:43,027 INFO L131 PetriNetUnfolder]: For 19834/19834 co-relation queries the response was YES. [2023-08-30 20:14:43,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11734 conditions, 1971 events. 986/1971 cut-off events. For 19834/19834 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 12605 event pairs, 22 based on Foata normal form. 26/1995 useless extension candidates. Maximal degree in co-relation 10978. Up to 625 conditions per place. [2023-08-30 20:14:43,052 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 165 selfloop transitions, 153 changer transitions 14/332 dead transitions. [2023-08-30 20:14:43,052 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 332 transitions, 4449 flow [2023-08-30 20:14:43,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 20:14:43,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 20:14:43,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3091 transitions. [2023-08-30 20:14:43,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4406272273699216 [2023-08-30 20:14:43,057 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3091 transitions. [2023-08-30 20:14:43,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3091 transitions. [2023-08-30 20:14:43,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:14:43,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3091 transitions. [2023-08-30 20:14:43,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 134.3913043478261) internal successors, (3091), 23 states have internal predecessors, (3091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:43,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 305.0) internal successors, (7320), 24 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:43,072 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 305.0) internal successors, (7320), 24 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:43,072 INFO L175 Difference]: Start difference. First operand has 115 places, 186 transitions, 2378 flow. Second operand 23 states and 3091 transitions. [2023-08-30 20:14:43,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 332 transitions, 4449 flow [2023-08-30 20:14:43,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 332 transitions, 4278 flow, removed 21 selfloop flow, removed 8 redundant places. [2023-08-30 20:14:43,141 INFO L231 Difference]: Finished difference. Result has 139 places, 235 transitions, 3422 flow [2023-08-30 20:14:43,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=2241, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3422, PETRI_PLACES=139, PETRI_TRANSITIONS=235} [2023-08-30 20:14:43,142 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 117 predicate places. [2023-08-30 20:14:43,142 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 235 transitions, 3422 flow [2023-08-30 20:14:43,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 131.0) internal successors, (1965), 15 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:43,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:14:43,143 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:14:43,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 20:14:43,348 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,SelfDestructingSolverStorable17 [2023-08-30 20:14:43,348 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:14:43,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:14:43,348 INFO L85 PathProgramCache]: Analyzing trace with hash 549254058, now seen corresponding path program 7 times [2023-08-30 20:14:43,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:14:43,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204910294] [2023-08-30 20:14:43,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:14:43,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:14:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:43,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:14:43,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:14:43,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204910294] [2023-08-30 20:14:43,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204910294] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:14:43,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003703294] [2023-08-30 20:14:43,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:14:43,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:14:43,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:14:43,456 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) [2023-08-30 20:14:43,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 20:14:43,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:43,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:14:43,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:14:43,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:14:43,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:14:43,673 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:14:43,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003703294] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:14:43,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:14:43,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-30 20:14:43,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725509469] [2023-08-30 20:14:43,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:14:43,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 20:14:43,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:14:43,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 20:14:43,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-08-30 20:14:43,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-30 20:14:43,755 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 235 transitions, 3422 flow. Second operand has 15 states, 15 states have (on average 131.13333333333333) internal successors, (1967), 15 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:43,755 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:14:43,755 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-30 20:14:43,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:14:44,511 INFO L130 PetriNetUnfolder]: 1214/2390 cut-off events. [2023-08-30 20:14:44,511 INFO L131 PetriNetUnfolder]: For 42971/42971 co-relation queries the response was YES. [2023-08-30 20:14:44,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17251 conditions, 2390 events. 1214/2390 cut-off events. For 42971/42971 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 15693 event pairs, 371 based on Foata normal form. 106/2494 useless extension candidates. Maximal degree in co-relation 16358. Up to 1604 conditions per place. [2023-08-30 20:14:44,574 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 239 selfloop transitions, 108 changer transitions 9/356 dead transitions. [2023-08-30 20:14:44,574 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 356 transitions, 5908 flow [2023-08-30 20:14:44,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 20:14:44,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 20:14:44,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1760 transitions. [2023-08-30 20:14:44,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44388398486759145 [2023-08-30 20:14:44,578 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1760 transitions. [2023-08-30 20:14:44,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1760 transitions. [2023-08-30 20:14:44,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:14:44,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1760 transitions. [2023-08-30 20:14:44,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 135.3846153846154) internal successors, (1760), 13 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:44,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 305.0) internal successors, (4270), 14 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:44,584 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 305.0) internal successors, (4270), 14 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:44,585 INFO L175 Difference]: Start difference. First operand has 139 places, 235 transitions, 3422 flow. Second operand 13 states and 1760 transitions. [2023-08-30 20:14:44,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 356 transitions, 5908 flow [2023-08-30 20:14:44,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 356 transitions, 5526 flow, removed 161 selfloop flow, removed 7 redundant places. [2023-08-30 20:14:44,754 INFO L231 Difference]: Finished difference. Result has 149 places, 297 transitions, 4606 flow [2023-08-30 20:14:44,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=3113, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4606, PETRI_PLACES=149, PETRI_TRANSITIONS=297} [2023-08-30 20:14:44,755 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 127 predicate places. [2023-08-30 20:14:44,755 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 297 transitions, 4606 flow [2023-08-30 20:14:44,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 131.13333333333333) internal successors, (1967), 15 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:44,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:14:44,756 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:14:44,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 20:14:44,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:14:44,962 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:14:44,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:14:44,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1583947118, now seen corresponding path program 8 times [2023-08-30 20:14:44,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:14:44,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410648953] [2023-08-30 20:14:44,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:14:44,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:14:44,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:45,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:14:45,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:14:45,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410648953] [2023-08-30 20:14:45,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410648953] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:14:45,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699401161] [2023-08-30 20:14:45,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:14:45,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:14:45,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:14:45,057 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) [2023-08-30 20:14:45,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 20:14:45,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:14:45,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:14:45,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:14:45,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:14:45,237 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:14:45,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:14:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:14:45,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699401161] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:14:45,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:14:45,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-30 20:14:45,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115835934] [2023-08-30 20:14:45,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:14:45,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 20:14:45,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:14:45,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 20:14:45,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-08-30 20:14:45,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-30 20:14:45,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 297 transitions, 4606 flow. Second operand has 13 states, 13 states have (on average 131.30769230769232) internal successors, (1707), 13 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) [2023-08-30 20:14:45,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:14:45,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-30 20:14:45,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:14:46,236 INFO L130 PetriNetUnfolder]: 1393/2776 cut-off events. [2023-08-30 20:14:46,236 INFO L131 PetriNetUnfolder]: For 61073/61073 co-relation queries the response was YES. [2023-08-30 20:14:46,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21427 conditions, 2776 events. 1393/2776 cut-off events. For 61073/61073 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 19089 event pairs, 152 based on Foata normal form. 48/2822 useless extension candidates. Maximal degree in co-relation 20398. Up to 1195 conditions per place. [2023-08-30 20:14:46,304 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 236 selfloop transitions, 196 changer transitions 8/440 dead transitions. [2023-08-30 20:14:46,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 440 transitions, 7324 flow [2023-08-30 20:14:46,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 20:14:46,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 20:14:46,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2042 transitions. [2023-08-30 20:14:46,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44633879781420766 [2023-08-30 20:14:46,307 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2042 transitions. [2023-08-30 20:14:46,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2042 transitions. [2023-08-30 20:14:46,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:14:46,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2042 transitions. [2023-08-30 20:14:46,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 136.13333333333333) internal successors, (2042), 15 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:46,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 305.0) internal successors, (4880), 16 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:46,315 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 305.0) internal successors, (4880), 16 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:46,315 INFO L175 Difference]: Start difference. First operand has 149 places, 297 transitions, 4606 flow. Second operand 15 states and 2042 transitions. [2023-08-30 20:14:46,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 440 transitions, 7324 flow [2023-08-30 20:14:46,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 440 transitions, 6822 flow, removed 213 selfloop flow, removed 5 redundant places. [2023-08-30 20:14:46,523 INFO L231 Difference]: Finished difference. Result has 163 places, 352 transitions, 5735 flow [2023-08-30 20:14:46,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=4128, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5735, PETRI_PLACES=163, PETRI_TRANSITIONS=352} [2023-08-30 20:14:46,523 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 141 predicate places. [2023-08-30 20:14:46,523 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 352 transitions, 5735 flow [2023-08-30 20:14:46,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 131.30769230769232) internal successors, (1707), 13 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) [2023-08-30 20:14:46,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:14:46,524 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:14:46,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 20:14:46,724 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,SelfDestructingSolverStorable19 [2023-08-30 20:14:46,724 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:14:46,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:14:46,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1724744702, now seen corresponding path program 9 times [2023-08-30 20:14:46,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:14:46,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501595018] [2023-08-30 20:14:46,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:14:46,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:14:46,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:46,820 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:14:46,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:14:46,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501595018] [2023-08-30 20:14:46,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501595018] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:14:46,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454458944] [2023-08-30 20:14:46,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:14:46,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:14:46,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:14:46,825 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) [2023-08-30 20:14:46,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 20:14:46,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:14:46,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:14:46,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:14:46,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:14:47,011 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:14:47,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:14:47,055 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:14:47,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454458944] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:14:47,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:14:47,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-30 20:14:47,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231804144] [2023-08-30 20:14:47,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:14:47,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 20:14:47,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:14:47,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 20:14:47,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-08-30 20:14:47,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-30 20:14:47,138 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 352 transitions, 5735 flow. Second operand has 15 states, 15 states have (on average 131.13333333333333) internal successors, (1967), 15 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:47,138 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:14:47,138 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-30 20:14:47,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:14:48,073 INFO L130 PetriNetUnfolder]: 1684/3315 cut-off events. [2023-08-30 20:14:48,073 INFO L131 PetriNetUnfolder]: For 77074/77074 co-relation queries the response was YES. [2023-08-30 20:14:48,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26880 conditions, 3315 events. 1684/3315 cut-off events. For 77074/77074 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 23491 event pairs, 232 based on Foata normal form. 102/3415 useless extension candidates. Maximal degree in co-relation 26354. Up to 2315 conditions per place. [2023-08-30 20:14:48,101 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 363 selfloop transitions, 137 changer transitions 3/503 dead transitions. [2023-08-30 20:14:48,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 503 transitions, 9411 flow [2023-08-30 20:14:48,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 20:14:48,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 20:14:48,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2295 transitions. [2023-08-30 20:14:48,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4426229508196721 [2023-08-30 20:14:48,105 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2295 transitions. [2023-08-30 20:14:48,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2295 transitions. [2023-08-30 20:14:48,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:14:48,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2295 transitions. [2023-08-30 20:14:48,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 135.0) internal successors, (2295), 17 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:48,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 305.0) internal successors, (5490), 18 states have internal predecessors, (5490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:48,114 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 305.0) internal successors, (5490), 18 states have internal predecessors, (5490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:48,114 INFO L175 Difference]: Start difference. First operand has 163 places, 352 transitions, 5735 flow. Second operand 17 states and 2295 transitions. [2023-08-30 20:14:48,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 503 transitions, 9411 flow [2023-08-30 20:14:48,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 503 transitions, 9101 flow, removed 110 selfloop flow, removed 8 redundant places. [2023-08-30 20:14:48,435 INFO L231 Difference]: Finished difference. Result has 180 places, 441 transitions, 7806 flow [2023-08-30 20:14:48,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=5478, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7806, PETRI_PLACES=180, PETRI_TRANSITIONS=441} [2023-08-30 20:14:48,436 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 158 predicate places. [2023-08-30 20:14:48,436 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 441 transitions, 7806 flow [2023-08-30 20:14:48,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 131.13333333333333) internal successors, (1967), 15 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:48,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:14:48,437 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:14:48,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-30 20:14:48,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:14:48,643 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:14:48,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:14:48,643 INFO L85 PathProgramCache]: Analyzing trace with hash -341483624, now seen corresponding path program 10 times [2023-08-30 20:14:48,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:14:48,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922913237] [2023-08-30 20:14:48,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:14:48,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:14:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:48,731 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:14:48,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:14:48,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922913237] [2023-08-30 20:14:48,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922913237] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:14:48,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416297425] [2023-08-30 20:14:48,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:14:48,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:14:48,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:14:48,737 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) [2023-08-30 20:14:48,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 20:14:48,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:14:48,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:14:48,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:14:48,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:14:48,910 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:14:48,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:14:48,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:14:48,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416297425] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:14:48,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:14:48,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-30 20:14:48,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485558595] [2023-08-30 20:14:48,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:14:48,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 20:14:48,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:14:48,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 20:14:48,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-08-30 20:14:49,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-30 20:14:49,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 441 transitions, 7806 flow. Second operand has 13 states, 13 states have (on average 131.23076923076923) internal successors, (1706), 13 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:49,066 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:14:49,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-30 20:14:49,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:14:50,094 INFO L130 PetriNetUnfolder]: 1959/3913 cut-off events. [2023-08-30 20:14:50,094 INFO L131 PetriNetUnfolder]: For 124982/124982 co-relation queries the response was YES. [2023-08-30 20:14:50,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35173 conditions, 3913 events. 1959/3913 cut-off events. For 124982/124982 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 29224 event pairs, 741 based on Foata normal form. 58/3969 useless extension candidates. Maximal degree in co-relation 34056. Up to 2901 conditions per place. [2023-08-30 20:14:50,129 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 433 selfloop transitions, 119 changer transitions 1/553 dead transitions. [2023-08-30 20:14:50,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 553 transitions, 10851 flow [2023-08-30 20:14:50,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 20:14:50,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 20:14:50,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1637 transitions. [2023-08-30 20:14:50,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44726775956284154 [2023-08-30 20:14:50,132 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1637 transitions. [2023-08-30 20:14:50,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1637 transitions. [2023-08-30 20:14:50,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:14:50,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1637 transitions. [2023-08-30 20:14:50,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 136.41666666666666) internal successors, (1637), 12 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:50,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 305.0) internal successors, (3965), 13 states have internal predecessors, (3965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:50,138 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 305.0) internal successors, (3965), 13 states have internal predecessors, (3965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:50,138 INFO L175 Difference]: Start difference. First operand has 180 places, 441 transitions, 7806 flow. Second operand 12 states and 1637 transitions. [2023-08-30 20:14:50,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 553 transitions, 10851 flow [2023-08-30 20:14:50,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 553 transitions, 9916 flow, removed 428 selfloop flow, removed 4 redundant places. [2023-08-30 20:14:50,718 INFO L231 Difference]: Finished difference. Result has 192 places, 496 transitions, 8474 flow [2023-08-30 20:14:50,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=6957, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8474, PETRI_PLACES=192, PETRI_TRANSITIONS=496} [2023-08-30 20:14:50,719 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 170 predicate places. [2023-08-30 20:14:50,719 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 496 transitions, 8474 flow [2023-08-30 20:14:50,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 131.23076923076923) internal successors, (1706), 13 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:50,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:14:50,719 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:14:50,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-30 20:14:50,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:14:50,921 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:14:50,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:14:50,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1849205694, now seen corresponding path program 11 times [2023-08-30 20:14:50,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:14:50,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21246313] [2023-08-30 20:14:50,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:14:50,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:14:50,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:51,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:14:51,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:14:51,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21246313] [2023-08-30 20:14:51,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21246313] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:14:51,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685944022] [2023-08-30 20:14:51,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:14:51,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:14:51,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:14:51,049 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) [2023-08-30 20:14:51,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 20:14:51,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:14:51,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:14:51,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:14:51,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:14:51,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:14:51,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:14:51,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:14:51,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685944022] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:14:51,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:14:51,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-30 20:14:51,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856756345] [2023-08-30 20:14:51,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:14:51,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 20:14:51,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:14:51,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 20:14:51,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-08-30 20:14:51,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-30 20:14:51,324 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 496 transitions, 8474 flow. Second operand has 11 states, 11 states have (on average 131.45454545454547) internal successors, (1446), 11 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:51,324 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:14:51,324 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-30 20:14:51,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:14:52,397 INFO L130 PetriNetUnfolder]: 2211/4356 cut-off events. [2023-08-30 20:14:52,397 INFO L131 PetriNetUnfolder]: For 152825/152825 co-relation queries the response was YES. [2023-08-30 20:14:52,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40023 conditions, 4356 events. 2211/4356 cut-off events. For 152825/152825 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 32702 event pairs, 330 based on Foata normal form. 40/4394 useless extension candidates. Maximal degree in co-relation 38844. Up to 2943 conditions per place. [2023-08-30 20:14:52,441 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 437 selfloop transitions, 155 changer transitions 0/592 dead transitions. [2023-08-30 20:14:52,442 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 592 transitions, 11367 flow [2023-08-30 20:14:52,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 20:14:52,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 20:14:52,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 954 transitions. [2023-08-30 20:14:52,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4468384074941452 [2023-08-30 20:14:52,444 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 954 transitions. [2023-08-30 20:14:52,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 954 transitions. [2023-08-30 20:14:52,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:14:52,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 954 transitions. [2023-08-30 20:14:52,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 136.28571428571428) internal successors, (954), 7 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:52,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 305.0) internal successors, (2440), 8 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:52,448 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 305.0) internal successors, (2440), 8 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:52,448 INFO L175 Difference]: Start difference. First operand has 192 places, 496 transitions, 8474 flow. Second operand 7 states and 954 transitions. [2023-08-30 20:14:52,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 592 transitions, 11367 flow [2023-08-30 20:14:53,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 592 transitions, 11087 flow, removed 114 selfloop flow, removed 4 redundant places. [2023-08-30 20:14:53,093 INFO L231 Difference]: Finished difference. Result has 198 places, 538 transitions, 9607 flow [2023-08-30 20:14:53,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=8194, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9607, PETRI_PLACES=198, PETRI_TRANSITIONS=538} [2023-08-30 20:14:53,095 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 176 predicate places. [2023-08-30 20:14:53,095 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 538 transitions, 9607 flow [2023-08-30 20:14:53,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 131.45454545454547) internal successors, (1446), 11 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:53,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:14:53,095 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:14:53,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-08-30 20:14:53,301 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,SelfDestructingSolverStorable22 [2023-08-30 20:14:53,301 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:14:53,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:14:53,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1259303408, now seen corresponding path program 12 times [2023-08-30 20:14:53,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:14:53,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334279241] [2023-08-30 20:14:53,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:14:53,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:14:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:53,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:14:53,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:14:53,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334279241] [2023-08-30 20:14:53,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334279241] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:14:53,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618933097] [2023-08-30 20:14:53,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:14:53,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:14:53,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:14:53,389 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) [2023-08-30 20:14:53,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 20:14:53,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 20:14:53,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:14:53,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:14:53,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:14:53,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:14:53,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:14:53,662 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:14:53,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618933097] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:14:53,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:14:53,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-30 20:14:53,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555604422] [2023-08-30 20:14:53,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:14:53,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 20:14:53,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:14:53,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 20:14:53,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-08-30 20:14:53,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-30 20:14:53,711 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 538 transitions, 9607 flow. Second operand has 13 states, 13 states have (on average 131.23076923076923) internal successors, (1706), 13 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:53,711 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:14:53,711 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-30 20:14:53,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:14:54,976 INFO L130 PetriNetUnfolder]: 2275/4489 cut-off events. [2023-08-30 20:14:54,976 INFO L131 PetriNetUnfolder]: For 165888/165888 co-relation queries the response was YES. [2023-08-30 20:14:55,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42483 conditions, 4489 events. 2275/4489 cut-off events. For 165888/165888 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 33895 event pairs, 522 based on Foata normal form. 20/4507 useless extension candidates. Maximal degree in co-relation 41299. Up to 2041 conditions per place. [2023-08-30 20:14:55,014 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 466 selfloop transitions, 160 changer transitions 4/630 dead transitions. [2023-08-30 20:14:55,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 630 transitions, 12414 flow [2023-08-30 20:14:55,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 20:14:55,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 20:14:55,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2291 transitions. [2023-08-30 20:14:55,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44185149469623913 [2023-08-30 20:14:55,018 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2291 transitions. [2023-08-30 20:14:55,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2291 transitions. [2023-08-30 20:14:55,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:14:55,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2291 transitions. [2023-08-30 20:14:55,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 134.76470588235293) internal successors, (2291), 17 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:55,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 305.0) internal successors, (5490), 18 states have internal predecessors, (5490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:55,025 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 305.0) internal successors, (5490), 18 states have internal predecessors, (5490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:55,025 INFO L175 Difference]: Start difference. First operand has 198 places, 538 transitions, 9607 flow. Second operand 17 states and 2291 transitions. [2023-08-30 20:14:55,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 630 transitions, 12414 flow [2023-08-30 20:14:55,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 630 transitions, 12259 flow, removed 57 selfloop flow, removed 2 redundant places. [2023-08-30 20:14:55,673 INFO L231 Difference]: Finished difference. Result has 220 places, 565 transitions, 10797 flow [2023-08-30 20:14:55,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=9460, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=10797, PETRI_PLACES=220, PETRI_TRANSITIONS=565} [2023-08-30 20:14:55,674 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 198 predicate places. [2023-08-30 20:14:55,674 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 565 transitions, 10797 flow [2023-08-30 20:14:55,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 131.23076923076923) internal successors, (1706), 13 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:55,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:14:55,675 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:14:55,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 20:14:55,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:14:55,880 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:14:55,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:14:55,881 INFO L85 PathProgramCache]: Analyzing trace with hash -269424514, now seen corresponding path program 13 times [2023-08-30 20:14:55,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:14:55,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890145115] [2023-08-30 20:14:55,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:14:55,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:14:55,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:55,978 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:14:55,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:14:55,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890145115] [2023-08-30 20:14:55,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890145115] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:14:55,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716572528] [2023-08-30 20:14:55,979 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:14:55,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:14:55,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:14:55,981 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) [2023-08-30 20:14:56,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 20:14:56,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:56,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:14:56,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:14:56,176 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:14:56,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:14:56,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:14:56,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716572528] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:14:56,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:14:56,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-30 20:14:56,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120673474] [2023-08-30 20:14:56,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:14:56,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 20:14:56,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:14:56,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 20:14:56,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-08-30 20:14:56,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-30 20:14:56,298 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 565 transitions, 10797 flow. Second operand has 15 states, 15 states have (on average 131.13333333333333) internal successors, (1967), 15 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:56,298 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:14:56,298 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-30 20:14:56,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:14:57,820 INFO L130 PetriNetUnfolder]: 2302/4555 cut-off events. [2023-08-30 20:14:57,820 INFO L131 PetriNetUnfolder]: For 228171/228171 co-relation queries the response was YES. [2023-08-30 20:14:57,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46898 conditions, 4555 events. 2302/4555 cut-off events. For 228171/228171 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 34595 event pairs, 480 based on Foata normal form. 24/4577 useless extension candidates. Maximal degree in co-relation 45534. Up to 1881 conditions per place. [2023-08-30 20:14:57,866 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 452 selfloop transitions, 198 changer transitions 18/668 dead transitions. [2023-08-30 20:14:57,867 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 668 transitions, 13860 flow [2023-08-30 20:14:57,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 20:14:57,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 20:14:57,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2820 transitions. [2023-08-30 20:14:57,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44028103044496486 [2023-08-30 20:14:57,872 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2820 transitions. [2023-08-30 20:14:57,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2820 transitions. [2023-08-30 20:14:57,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:14:57,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2820 transitions. [2023-08-30 20:14:57,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 134.28571428571428) internal successors, (2820), 21 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:57,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 305.0) internal successors, (6710), 22 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:57,882 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 305.0) internal successors, (6710), 22 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:57,882 INFO L175 Difference]: Start difference. First operand has 220 places, 565 transitions, 10797 flow. Second operand 21 states and 2820 transitions. [2023-08-30 20:14:57,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 668 transitions, 13860 flow [2023-08-30 20:14:58,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 668 transitions, 13250 flow, removed 283 selfloop flow, removed 3 redundant places. [2023-08-30 20:14:58,879 INFO L231 Difference]: Finished difference. Result has 246 places, 588 transitions, 11575 flow [2023-08-30 20:14:58,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=10187, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=11575, PETRI_PLACES=246, PETRI_TRANSITIONS=588} [2023-08-30 20:14:58,880 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 224 predicate places. [2023-08-30 20:14:58,880 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 588 transitions, 11575 flow [2023-08-30 20:14:58,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 131.13333333333333) internal successors, (1967), 15 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:58,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:14:58,881 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:14:58,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 20:14:59,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:14:59,081 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:14:59,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:14:59,082 INFO L85 PathProgramCache]: Analyzing trace with hash 176831978, now seen corresponding path program 14 times [2023-08-30 20:14:59,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:14:59,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078125286] [2023-08-30 20:14:59,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:14:59,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:14:59,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:59,175 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:14:59,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:14:59,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078125286] [2023-08-30 20:14:59,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078125286] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:14:59,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860552948] [2023-08-30 20:14:59,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:14:59,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:14:59,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:14:59,181 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:14:59,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 20:14:59,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:14:59,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:14:59,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:14:59,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:14:59,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:14:59,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:14:59,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:14:59,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860552948] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:14:59,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:14:59,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-30 20:14:59,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781399941] [2023-08-30 20:14:59,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:14:59,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 20:14:59,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:14:59,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 20:14:59,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-08-30 20:14:59,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-30 20:14:59,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 588 transitions, 11575 flow. Second operand has 13 states, 13 states have (on average 131.3846153846154) internal successors, (1708), 13 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:59,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:14:59,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-30 20:14:59,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:00,688 INFO L130 PetriNetUnfolder]: 2435/4768 cut-off events. [2023-08-30 20:15:00,688 INFO L131 PetriNetUnfolder]: For 311310/311310 co-relation queries the response was YES. [2023-08-30 20:15:00,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52010 conditions, 4768 events. 2435/4768 cut-off events. For 311310/311310 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 36086 event pairs, 330 based on Foata normal form. 18/4784 useless extension candidates. Maximal degree in co-relation 50697. Up to 3920 conditions per place. [2023-08-30 20:15:00,742 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 540 selfloop transitions, 139 changer transitions 4/683 dead transitions. [2023-08-30 20:15:00,743 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 683 transitions, 14647 flow [2023-08-30 20:15:00,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 20:15:00,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 20:15:00,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1479 transitions. [2023-08-30 20:15:00,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4408345752608048 [2023-08-30 20:15:00,746 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1479 transitions. [2023-08-30 20:15:00,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1479 transitions. [2023-08-30 20:15:00,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:00,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1479 transitions. [2023-08-30 20:15:00,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 134.45454545454547) internal successors, (1479), 11 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:00,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 305.0) internal successors, (3660), 12 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:00,752 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 305.0) internal successors, (3660), 12 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:00,752 INFO L175 Difference]: Start difference. First operand has 246 places, 588 transitions, 11575 flow. Second operand 11 states and 1479 transitions. [2023-08-30 20:15:00,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 683 transitions, 14647 flow [2023-08-30 20:15:02,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 683 transitions, 14005 flow, removed 285 selfloop flow, removed 9 redundant places. [2023-08-30 20:15:02,014 INFO L231 Difference]: Finished difference. Result has 250 places, 643 transitions, 12387 flow [2023-08-30 20:15:02,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=10957, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12387, PETRI_PLACES=250, PETRI_TRANSITIONS=643} [2023-08-30 20:15:02,014 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 228 predicate places. [2023-08-30 20:15:02,014 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 643 transitions, 12387 flow [2023-08-30 20:15:02,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 131.3846153846154) internal successors, (1708), 13 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:02,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:02,015 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:15:02,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 20:15:02,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:02,216 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:15:02,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:02,216 INFO L85 PathProgramCache]: Analyzing trace with hash 2069382376, now seen corresponding path program 15 times [2023-08-30 20:15:02,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:02,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129234583] [2023-08-30 20:15:02,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:02,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:02,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:02,291 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:15:02,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:02,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129234583] [2023-08-30 20:15:02,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129234583] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:15:02,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557393462] [2023-08-30 20:15:02,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:15:02,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:02,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:15:02,293 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:15:02,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 20:15:02,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:15:02,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:15:02,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:15:02,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:15:02,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:15:02,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:15:02,494 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:15:02,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557393462] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:15:02,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:15:02,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-30 20:15:02,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382097810] [2023-08-30 20:15:02,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:15:02,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 20:15:02,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:02,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 20:15:02,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-08-30 20:15:02,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-30 20:15:02,544 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 643 transitions, 12387 flow. Second operand has 12 states, 12 states have (on average 131.33333333333334) internal successors, (1576), 12 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:02,544 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:02,544 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-30 20:15:02,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:04,040 INFO L130 PetriNetUnfolder]: 2524/4994 cut-off events. [2023-08-30 20:15:04,040 INFO L131 PetriNetUnfolder]: For 364898/364898 co-relation queries the response was YES. [2023-08-30 20:15:04,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56104 conditions, 4994 events. 2524/4994 cut-off events. For 364898/364898 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 38622 event pairs, 431 based on Foata normal form. 24/5016 useless extension candidates. Maximal degree in co-relation 55387. Up to 1846 conditions per place. [2023-08-30 20:15:04,095 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 475 selfloop transitions, 263 changer transitions 1/739 dead transitions. [2023-08-30 20:15:04,095 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 739 transitions, 15773 flow [2023-08-30 20:15:04,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 20:15:04,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 20:15:04,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2429 transitions. [2023-08-30 20:15:04,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4424408014571949 [2023-08-30 20:15:04,103 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2429 transitions. [2023-08-30 20:15:04,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2429 transitions. [2023-08-30 20:15:04,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:04,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2429 transitions. [2023-08-30 20:15:04,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 134.94444444444446) internal successors, (2429), 18 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:04,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 305.0) internal successors, (5795), 19 states have internal predecessors, (5795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:04,111 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 305.0) internal successors, (5795), 19 states have internal predecessors, (5795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:04,112 INFO L175 Difference]: Start difference. First operand has 250 places, 643 transitions, 12387 flow. Second operand 18 states and 2429 transitions. [2023-08-30 20:15:04,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 739 transitions, 15773 flow [2023-08-30 20:15:05,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 739 transitions, 15381 flow, removed 158 selfloop flow, removed 4 redundant places. [2023-08-30 20:15:05,584 INFO L231 Difference]: Finished difference. Result has 270 places, 666 transitions, 13740 flow [2023-08-30 20:15:05,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=12013, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=13740, PETRI_PLACES=270, PETRI_TRANSITIONS=666} [2023-08-30 20:15:05,585 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 248 predicate places. [2023-08-30 20:15:05,585 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 666 transitions, 13740 flow [2023-08-30 20:15:05,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 131.33333333333334) internal successors, (1576), 12 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:05,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:05,585 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:15:05,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 20:15:05,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-30 20:15:05,786 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:15:05,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:05,786 INFO L85 PathProgramCache]: Analyzing trace with hash 575743984, now seen corresponding path program 16 times [2023-08-30 20:15:05,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:05,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278790635] [2023-08-30 20:15:05,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:05,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:05,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:05,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:15:05,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:05,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278790635] [2023-08-30 20:15:05,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278790635] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:15:05,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839088933] [2023-08-30 20:15:05,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:15:05,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:05,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:15:05,865 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:15:05,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 20:15:05,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:15:05,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:15:05,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:15:05,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:15:06,018 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:15:06,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:15:06,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:15:06,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839088933] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:15:06,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:15:06,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-30 20:15:06,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545952043] [2023-08-30 20:15:06,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:15:06,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 20:15:06,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:06,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 20:15:06,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-30 20:15:06,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-30 20:15:06,077 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 666 transitions, 13740 flow. Second operand has 11 states, 11 states have (on average 131.45454545454547) internal successors, (1446), 11 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:06,077 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:06,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-30 20:15:06,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:07,684 INFO L130 PetriNetUnfolder]: 2527/5024 cut-off events. [2023-08-30 20:15:07,684 INFO L131 PetriNetUnfolder]: For 406053/406053 co-relation queries the response was YES. [2023-08-30 20:15:07,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58803 conditions, 5024 events. 2527/5024 cut-off events. For 406053/406053 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 39154 event pairs, 599 based on Foata normal form. 6/5028 useless extension candidates. Maximal degree in co-relation 58393. Up to 2204 conditions per place. [2023-08-30 20:15:07,734 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 543 selfloop transitions, 163 changer transitions 13/719 dead transitions. [2023-08-30 20:15:07,734 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 719 transitions, 16091 flow [2023-08-30 20:15:07,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 20:15:07,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 20:15:07,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1481 transitions. [2023-08-30 20:15:07,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44143070044709387 [2023-08-30 20:15:07,736 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1481 transitions. [2023-08-30 20:15:07,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1481 transitions. [2023-08-30 20:15:07,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:07,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1481 transitions. [2023-08-30 20:15:07,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 134.63636363636363) internal successors, (1481), 11 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:07,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 305.0) internal successors, (3660), 12 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:07,740 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 305.0) internal successors, (3660), 12 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:07,740 INFO L175 Difference]: Start difference. First operand has 270 places, 666 transitions, 13740 flow. Second operand 11 states and 1481 transitions. [2023-08-30 20:15:07,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 719 transitions, 16091 flow [2023-08-30 20:15:09,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 719 transitions, 15222 flow, removed 293 selfloop flow, removed 7 redundant places. [2023-08-30 20:15:09,291 INFO L231 Difference]: Finished difference. Result has 277 places, 668 transitions, 13453 flow [2023-08-30 20:15:09,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=12929, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13453, PETRI_PLACES=277, PETRI_TRANSITIONS=668} [2023-08-30 20:15:09,292 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 255 predicate places. [2023-08-30 20:15:09,292 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 668 transitions, 13453 flow [2023-08-30 20:15:09,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 131.45454545454547) internal successors, (1446), 11 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:09,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:09,293 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:15:09,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-08-30 20:15:09,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-30 20:15:09,499 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:15:09,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:09,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1232509748, now seen corresponding path program 17 times [2023-08-30 20:15:09,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:09,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037546822] [2023-08-30 20:15:09,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:09,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:09,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:09,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:15:09,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:09,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037546822] [2023-08-30 20:15:09,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037546822] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:15:09,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985944358] [2023-08-30 20:15:09,588 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:15:09,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:09,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:15:09,589 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:15:09,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 20:15:09,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:15:09,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:15:09,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:15:09,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:15:09,779 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:15:09,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:15:09,810 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:15:09,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985944358] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:15:09,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:15:09,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-30 20:15:09,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831414278] [2023-08-30 20:15:09,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:15:09,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 20:15:09,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:09,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 20:15:09,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-08-30 20:15:09,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-30 20:15:09,866 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 668 transitions, 13453 flow. Second operand has 13 states, 13 states have (on average 131.23076923076923) internal successors, (1706), 13 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:09,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:09,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-30 20:15:09,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:11,471 INFO L130 PetriNetUnfolder]: 2508/4962 cut-off events. [2023-08-30 20:15:11,471 INFO L131 PetriNetUnfolder]: For 388713/388713 co-relation queries the response was YES. [2023-08-30 20:15:11,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57201 conditions, 4962 events. 2508/4962 cut-off events. For 388713/388713 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 38402 event pairs, 537 based on Foata normal form. 6/4966 useless extension candidates. Maximal degree in co-relation 56787. Up to 2204 conditions per place. [2023-08-30 20:15:11,526 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 505 selfloop transitions, 218 changer transitions 12/735 dead transitions. [2023-08-30 20:15:11,526 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 735 transitions, 15835 flow [2023-08-30 20:15:11,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 20:15:11,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 20:15:11,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2416 transitions. [2023-08-30 20:15:11,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4400728597449909 [2023-08-30 20:15:11,528 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2416 transitions. [2023-08-30 20:15:11,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2416 transitions. [2023-08-30 20:15:11,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:11,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2416 transitions. [2023-08-30 20:15:11,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 134.22222222222223) internal successors, (2416), 18 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:11,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 305.0) internal successors, (5795), 19 states have internal predecessors, (5795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:11,533 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 305.0) internal successors, (5795), 19 states have internal predecessors, (5795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:11,533 INFO L175 Difference]: Start difference. First operand has 277 places, 668 transitions, 13453 flow. Second operand 18 states and 2416 transitions. [2023-08-30 20:15:11,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 735 transitions, 15835 flow [2023-08-30 20:15:13,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 735 transitions, 15556 flow, removed 92 selfloop flow, removed 5 redundant places. [2023-08-30 20:15:13,050 INFO L231 Difference]: Finished difference. Result has 288 places, 666 transitions, 13648 flow [2023-08-30 20:15:13,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=13254, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=13648, PETRI_PLACES=288, PETRI_TRANSITIONS=666} [2023-08-30 20:15:13,051 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 266 predicate places. [2023-08-30 20:15:13,051 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 666 transitions, 13648 flow [2023-08-30 20:15:13,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 131.23076923076923) internal successors, (1706), 13 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:13,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:13,052 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:15:13,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-08-30 20:15:13,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-30 20:15:13,253 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:15:13,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:13,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1433210416, now seen corresponding path program 18 times [2023-08-30 20:15:13,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:13,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744016286] [2023-08-30 20:15:13,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:13,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:13,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:13,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:15:13,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:13,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744016286] [2023-08-30 20:15:13,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744016286] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:15:13,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663608113] [2023-08-30 20:15:13,328 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:15:13,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:13,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:15:13,330 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:15:13,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 20:15:13,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 20:15:13,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:15:13,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:15:13,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:15:13,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:15:13,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:15:13,590 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:15:13,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663608113] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:15:13,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:15:13,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-30 20:15:13,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473685661] [2023-08-30 20:15:13,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:15:13,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 20:15:13,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:13,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 20:15:13,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-08-30 20:15:13,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-30 20:15:13,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 666 transitions, 13648 flow. Second operand has 12 states, 12 states have (on average 131.58333333333334) internal successors, (1579), 12 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:13,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:13,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-30 20:15:13,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:15,354 INFO L130 PetriNetUnfolder]: 2530/5002 cut-off events. [2023-08-30 20:15:15,354 INFO L131 PetriNetUnfolder]: For 308599/308599 co-relation queries the response was YES. [2023-08-30 20:15:15,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54607 conditions, 5002 events. 2530/5002 cut-off events. For 308599/308599 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 38746 event pairs, 718 based on Foata normal form. 36/5036 useless extension candidates. Maximal degree in co-relation 54193. Up to 2990 conditions per place. [2023-08-30 20:15:15,420 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 486 selfloop transitions, 253 changer transitions 4/743 dead transitions. [2023-08-30 20:15:15,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 743 transitions, 16419 flow [2023-08-30 20:15:15,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 20:15:15,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 20:15:15,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1773 transitions. [2023-08-30 20:15:15,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4471626733921816 [2023-08-30 20:15:15,424 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1773 transitions. [2023-08-30 20:15:15,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1773 transitions. [2023-08-30 20:15:15,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:15,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1773 transitions. [2023-08-30 20:15:15,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 136.3846153846154) internal successors, (1773), 13 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:15,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 305.0) internal successors, (4270), 14 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:15,428 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 305.0) internal successors, (4270), 14 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:15,428 INFO L175 Difference]: Start difference. First operand has 288 places, 666 transitions, 13648 flow. Second operand 13 states and 1773 transitions. [2023-08-30 20:15:15,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 743 transitions, 16419 flow [2023-08-30 20:15:16,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 743 transitions, 16001 flow, removed 32 selfloop flow, removed 18 redundant places. [2023-08-30 20:15:16,842 INFO L231 Difference]: Finished difference. Result has 284 places, 678 transitions, 14401 flow [2023-08-30 20:15:16,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=13270, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=14401, PETRI_PLACES=284, PETRI_TRANSITIONS=678} [2023-08-30 20:15:16,842 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 262 predicate places. [2023-08-30 20:15:16,842 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 678 transitions, 14401 flow [2023-08-30 20:15:16,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 131.58333333333334) internal successors, (1579), 12 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:16,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:16,843 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:15:16,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 20:15:17,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:17,043 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:15:17,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:17,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1176200413, now seen corresponding path program 19 times [2023-08-30 20:15:17,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:17,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483769798] [2023-08-30 20:15:17,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:17,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:17,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:18,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:18,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:18,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483769798] [2023-08-30 20:15:18,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483769798] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:15:18,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926639233] [2023-08-30 20:15:18,336 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:15:18,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:18,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:15:18,337 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:15:18,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 20:15:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:18,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 20:15:18,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:15:18,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:15:18,665 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-30 20:15:18,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 36 [2023-08-30 20:15:18,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-08-30 20:15:18,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:15:18,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:15:18,736 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1098 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1098) c_~f_inv~0.base) (+ (* c_~counter~0 4) c_~f_inv~0.offset)) 0)) is different from false [2023-08-30 20:15:18,752 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:15:18,753 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 66 treesize of output 49 [2023-08-30 20:15:18,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-08-30 20:15:18,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 1 not checked. [2023-08-30 20:15:18,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926639233] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:15:18,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:15:18,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 6] total 20 [2023-08-30 20:15:18,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478182814] [2023-08-30 20:15:18,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:15:18,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 20:15:18,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:18,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 20:15:18,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=357, Unknown=1, NotChecked=38, Total=462 [2023-08-30 20:15:19,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 305 [2023-08-30 20:15:19,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 678 transitions, 14401 flow. Second operand has 22 states, 22 states have (on average 85.95454545454545) internal successors, (1891), 22 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:19,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:19,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 305 [2023-08-30 20:15:19,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:21,513 INFO L130 PetriNetUnfolder]: 2753/5476 cut-off events. [2023-08-30 20:15:21,514 INFO L131 PetriNetUnfolder]: For 341172/341215 co-relation queries the response was YES. [2023-08-30 20:15:21,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59958 conditions, 5476 events. 2753/5476 cut-off events. For 341172/341215 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 43428 event pairs, 330 based on Foata normal form. 43/5501 useless extension candidates. Maximal degree in co-relation 59544. Up to 4456 conditions per place. [2023-08-30 20:15:21,582 INFO L137 encePairwiseOnDemand]: 292/305 looper letters, 642 selfloop transitions, 205 changer transitions 26/881 dead transitions. [2023-08-30 20:15:21,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 881 transitions, 19945 flow [2023-08-30 20:15:21,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 20:15:21,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 20:15:21,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1778 transitions. [2023-08-30 20:15:21,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29147540983606557 [2023-08-30 20:15:21,591 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1778 transitions. [2023-08-30 20:15:21,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1778 transitions. [2023-08-30 20:15:21,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:21,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1778 transitions. [2023-08-30 20:15:21,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 88.9) internal successors, (1778), 20 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:21,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 305.0) internal successors, (6405), 21 states have internal predecessors, (6405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:21,598 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 305.0) internal successors, (6405), 21 states have internal predecessors, (6405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:21,598 INFO L175 Difference]: Start difference. First operand has 284 places, 678 transitions, 14401 flow. Second operand 20 states and 1778 transitions. [2023-08-30 20:15:21,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 881 transitions, 19945 flow [2023-08-30 20:15:23,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 881 transitions, 19216 flow, removed 84 selfloop flow, removed 13 redundant places. [2023-08-30 20:15:23,255 INFO L231 Difference]: Finished difference. Result has 297 places, 792 transitions, 16765 flow [2023-08-30 20:15:23,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=13828, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=16765, PETRI_PLACES=297, PETRI_TRANSITIONS=792} [2023-08-30 20:15:23,259 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 275 predicate places. [2023-08-30 20:15:23,259 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 792 transitions, 16765 flow [2023-08-30 20:15:23,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 85.95454545454545) internal successors, (1891), 22 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:23,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:23,259 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:15:23,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-30 20:15:23,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:23,466 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:15:23,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:23,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1264890525, now seen corresponding path program 20 times [2023-08-30 20:15:23,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:23,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640390243] [2023-08-30 20:15:23,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:23,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:23,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:23,552 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:15:23,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:23,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640390243] [2023-08-30 20:15:23,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640390243] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:15:23,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832500600] [2023-08-30 20:15:23,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:15:23,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:23,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:15:23,555 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:15:23,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-30 20:15:23,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:15:23,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:15:23,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:15:23,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:15:23,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:15:23,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:15:23,802 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:15:23,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832500600] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:15:23,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:15:23,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-30 20:15:23,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332282776] [2023-08-30 20:15:23,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:15:23,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 20:15:23,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:23,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 20:15:23,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-08-30 20:15:23,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-30 20:15:23,866 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 792 transitions, 16765 flow. Second operand has 13 states, 13 states have (on average 131.6153846153846) internal successors, (1711), 13 states have internal predecessors, (1711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:23,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:23,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-30 20:15:23,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:25,668 INFO L130 PetriNetUnfolder]: 2799/5666 cut-off events. [2023-08-30 20:15:25,668 INFO L131 PetriNetUnfolder]: For 335386/335386 co-relation queries the response was YES. [2023-08-30 20:15:25,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62010 conditions, 5666 events. 2799/5666 cut-off events. For 335386/335386 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 45877 event pairs, 506 based on Foata normal form. 28/5692 useless extension candidates. Maximal degree in co-relation 61586. Up to 2949 conditions per place. [2023-08-30 20:15:25,739 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 707 selfloop transitions, 234 changer transitions 70/1011 dead transitions. [2023-08-30 20:15:25,739 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 1011 transitions, 22779 flow [2023-08-30 20:15:25,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 20:15:25,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 20:15:25,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2273 transitions. [2023-08-30 20:15:25,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43837994214079073 [2023-08-30 20:15:25,742 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2273 transitions. [2023-08-30 20:15:25,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2273 transitions. [2023-08-30 20:15:25,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:25,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2273 transitions. [2023-08-30 20:15:25,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 133.7058823529412) internal successors, (2273), 17 states have internal predecessors, (2273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:25,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 305.0) internal successors, (5490), 18 states have internal predecessors, (5490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:25,748 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 305.0) internal successors, (5490), 18 states have internal predecessors, (5490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:25,748 INFO L175 Difference]: Start difference. First operand has 297 places, 792 transitions, 16765 flow. Second operand 17 states and 2273 transitions. [2023-08-30 20:15:25,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 1011 transitions, 22779 flow [2023-08-30 20:15:27,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 1011 transitions, 22435 flow, removed 167 selfloop flow, removed 3 redundant places. [2023-08-30 20:15:27,593 INFO L231 Difference]: Finished difference. Result has 314 places, 882 transitions, 19149 flow [2023-08-30 20:15:27,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=16178, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=782, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=19149, PETRI_PLACES=314, PETRI_TRANSITIONS=882} [2023-08-30 20:15:27,594 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 292 predicate places. [2023-08-30 20:15:27,594 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 882 transitions, 19149 flow [2023-08-30 20:15:27,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 131.6153846153846) internal successors, (1711), 13 states have internal predecessors, (1711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:27,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:27,595 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:15:27,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-30 20:15:27,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-08-30 20:15:27,801 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:15:27,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:27,801 INFO L85 PathProgramCache]: Analyzing trace with hash -622098217, now seen corresponding path program 21 times [2023-08-30 20:15:27,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:27,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199183682] [2023-08-30 20:15:27,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:27,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:27,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:27,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:15:27,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:27,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199183682] [2023-08-30 20:15:27,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199183682] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:15:27,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113119267] [2023-08-30 20:15:27,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:15:27,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:27,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:15:27,913 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:15:27,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-30 20:15:28,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 20:15:28,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:15:28,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:15:28,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:15:28,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:15:28,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:15:28,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:15:28,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113119267] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:15:28,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:15:28,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-30 20:15:28,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259371796] [2023-08-30 20:15:28,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:15:28,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 20:15:28,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:28,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 20:15:28,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-08-30 20:15:28,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-30 20:15:28,314 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 882 transitions, 19149 flow. Second operand has 13 states, 13 states have (on average 131.3846153846154) internal successors, (1708), 13 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:28,314 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:28,314 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-30 20:15:28,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:30,214 INFO L130 PetriNetUnfolder]: 2623/5346 cut-off events. [2023-08-30 20:15:30,214 INFO L131 PetriNetUnfolder]: For 345214/345214 co-relation queries the response was YES. [2023-08-30 20:15:30,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60402 conditions, 5346 events. 2623/5346 cut-off events. For 345214/345214 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 43180 event pairs, 70 based on Foata normal form. 28/5372 useless extension candidates. Maximal degree in co-relation 60227. Up to 2226 conditions per place. [2023-08-30 20:15:30,277 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 632 selfloop transitions, 334 changer transitions 9/975 dead transitions. [2023-08-30 20:15:30,278 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 975 transitions, 22888 flow [2023-08-30 20:15:30,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 20:15:30,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 20:15:30,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2805 transitions. [2023-08-30 20:15:30,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4379391100702576 [2023-08-30 20:15:30,280 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2805 transitions. [2023-08-30 20:15:30,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2805 transitions. [2023-08-30 20:15:30,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:30,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2805 transitions. [2023-08-30 20:15:30,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 133.57142857142858) internal successors, (2805), 21 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:30,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 305.0) internal successors, (6710), 22 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:30,285 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 305.0) internal successors, (6710), 22 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:30,285 INFO L175 Difference]: Start difference. First operand has 314 places, 882 transitions, 19149 flow. Second operand 21 states and 2805 transitions. [2023-08-30 20:15:30,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 975 transitions, 22888 flow [2023-08-30 20:15:32,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 975 transitions, 21926 flow, removed 453 selfloop flow, removed 2 redundant places. [2023-08-30 20:15:32,545 INFO L231 Difference]: Finished difference. Result has 335 places, 900 transitions, 19619 flow [2023-08-30 20:15:32,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=18032, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=872, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=307, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=19619, PETRI_PLACES=335, PETRI_TRANSITIONS=900} [2023-08-30 20:15:32,546 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 313 predicate places. [2023-08-30 20:15:32,546 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 900 transitions, 19619 flow [2023-08-30 20:15:32,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 131.3846153846154) internal successors, (1708), 13 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:32,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:32,546 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:15:32,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-08-30 20:15:32,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-08-30 20:15:32,747 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:15:32,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:32,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1826008881, now seen corresponding path program 22 times [2023-08-30 20:15:32,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:32,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518780640] [2023-08-30 20:15:32,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:32,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:32,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:32,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:15:32,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:32,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518780640] [2023-08-30 20:15:32,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518780640] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:15:32,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359274850] [2023-08-30 20:15:32,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:15:32,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:32,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:15:32,827 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:15:32,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-30 20:15:32,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:15:32,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:15:32,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:15:32,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:15:33,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:15:33,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:15:33,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:15:33,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359274850] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:15:33,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:15:33,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-30 20:15:33,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131367792] [2023-08-30 20:15:33,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:15:33,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 20:15:33,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:33,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 20:15:33,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-30 20:15:33,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-30 20:15:33,102 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 900 transitions, 19619 flow. Second operand has 12 states, 12 states have (on average 131.33333333333334) internal successors, (1576), 12 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:33,102 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:33,102 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-30 20:15:33,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:35,377 INFO L130 PetriNetUnfolder]: 2719/5561 cut-off events. [2023-08-30 20:15:35,377 INFO L131 PetriNetUnfolder]: For 366921/366921 co-relation queries the response was YES. [2023-08-30 20:15:35,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62917 conditions, 5561 events. 2719/5561 cut-off events. For 366921/366921 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 45288 event pairs, 84 based on Foata normal form. 64/5623 useless extension candidates. Maximal degree in co-relation 62738. Up to 2077 conditions per place. [2023-08-30 20:15:35,449 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 630 selfloop transitions, 392 changer transitions 7/1029 dead transitions. [2023-08-30 20:15:35,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 1029 transitions, 24666 flow [2023-08-30 20:15:35,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 20:15:35,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 20:15:35,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2687 transitions. [2023-08-30 20:15:35,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44049180327868853 [2023-08-30 20:15:35,452 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2687 transitions. [2023-08-30 20:15:35,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2687 transitions. [2023-08-30 20:15:35,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:35,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2687 transitions. [2023-08-30 20:15:35,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 134.35) internal successors, (2687), 20 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:35,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 305.0) internal successors, (6405), 21 states have internal predecessors, (6405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:35,460 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 305.0) internal successors, (6405), 21 states have internal predecessors, (6405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:35,460 INFO L175 Difference]: Start difference. First operand has 335 places, 900 transitions, 19619 flow. Second operand 20 states and 2687 transitions. [2023-08-30 20:15:35,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 1029 transitions, 24666 flow [2023-08-30 20:15:37,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 1029 transitions, 23945 flow, removed 312 selfloop flow, removed 5 redundant places. [2023-08-30 20:15:37,823 INFO L231 Difference]: Finished difference. Result has 357 places, 942 transitions, 21812 flow [2023-08-30 20:15:37,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=18720, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=893, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=354, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=21812, PETRI_PLACES=357, PETRI_TRANSITIONS=942} [2023-08-30 20:15:37,824 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 335 predicate places. [2023-08-30 20:15:37,824 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 942 transitions, 21812 flow [2023-08-30 20:15:37,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 131.33333333333334) internal successors, (1576), 12 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:37,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:37,824 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:15:37,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-08-30 20:15:38,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:38,025 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:15:38,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:38,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1058366777, now seen corresponding path program 23 times [2023-08-30 20:15:38,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:38,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813994] [2023-08-30 20:15:38,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:38,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:38,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:38,105 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:15:38,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:38,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813994] [2023-08-30 20:15:38,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813994] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:15:38,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739387445] [2023-08-30 20:15:38,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:15:38,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:38,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:15:38,109 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:15:38,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-30 20:15:38,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 20:15:38,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:15:38,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:15:38,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:15:38,312 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:15:38,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:15:38,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:15:38,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739387445] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:15:38,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:15:38,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-30 20:15:38,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223201454] [2023-08-30 20:15:38,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:15:38,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 20:15:38,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:38,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 20:15:38,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-08-30 20:15:38,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-30 20:15:38,400 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 942 transitions, 21812 flow. Second operand has 12 states, 12 states have (on average 131.33333333333334) internal successors, (1576), 12 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:38,400 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:38,400 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-30 20:15:38,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:40,479 INFO L130 PetriNetUnfolder]: 2625/5329 cut-off events. [2023-08-30 20:15:40,479 INFO L131 PetriNetUnfolder]: For 336676/336676 co-relation queries the response was YES. [2023-08-30 20:15:40,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59565 conditions, 5329 events. 2625/5329 cut-off events. For 336676/336676 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 42402 event pairs, 214 based on Foata normal form. 52/5379 useless extension candidates. Maximal degree in co-relation 59377. Up to 3508 conditions per place. [2023-08-30 20:15:40,550 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 645 selfloop transitions, 345 changer transitions 1/991 dead transitions. [2023-08-30 20:15:40,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 991 transitions, 24447 flow [2023-08-30 20:15:40,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 20:15:40,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 20:15:40,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1883 transitions. [2023-08-30 20:15:40,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44098360655737706 [2023-08-30 20:15:40,552 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1883 transitions. [2023-08-30 20:15:40,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1883 transitions. [2023-08-30 20:15:40,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:40,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1883 transitions. [2023-08-30 20:15:40,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 134.5) internal successors, (1883), 14 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:40,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 305.0) internal successors, (4575), 15 states have internal predecessors, (4575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:40,555 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 305.0) internal successors, (4575), 15 states have internal predecessors, (4575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:40,555 INFO L175 Difference]: Start difference. First operand has 357 places, 942 transitions, 21812 flow. Second operand 14 states and 1883 transitions. [2023-08-30 20:15:40,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 991 transitions, 24447 flow [2023-08-30 20:15:43,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 991 transitions, 23553 flow, removed 368 selfloop flow, removed 10 redundant places. [2023-08-30 20:15:43,099 INFO L231 Difference]: Finished difference. Result has 360 places, 938 transitions, 21586 flow [2023-08-30 20:15:43,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=20537, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=934, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=341, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=21586, PETRI_PLACES=360, PETRI_TRANSITIONS=938} [2023-08-30 20:15:43,100 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 338 predicate places. [2023-08-30 20:15:43,100 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 938 transitions, 21586 flow [2023-08-30 20:15:43,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 131.33333333333334) internal successors, (1576), 12 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:43,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:43,101 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:15:43,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-08-30 20:15:43,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:43,301 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:15:43,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:43,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1367206724, now seen corresponding path program 24 times [2023-08-30 20:15:43,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:43,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795500245] [2023-08-30 20:15:43,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:43,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:43,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:43,598 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:15:43,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:43,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795500245] [2023-08-30 20:15:43,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795500245] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:15:43,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549167106] [2023-08-30 20:15:43,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:15:43,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:43,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:15:43,601 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:15:43,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-30 20:15:43,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 20:15:43,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:15:43,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 20:15:43,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:15:43,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:15:43,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:15:43,919 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 20:15:43,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-30 20:15:43,954 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 [2023-08-30 20:15:44,002 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:15:44,003 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 20:15:44,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2023-08-30 20:15:44,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2023-08-30 20:15:44,111 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 [2023-08-30 20:15:44,160 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 [2023-08-30 20:15:44,284 INFO L321 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2023-08-30 20:15:44,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 63 treesize of output 29 [2023-08-30 20:15:44,296 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:15:44,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:15:44,526 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1317 (Array Int Int)) (~f_inv~0.base Int) (v_~counter~0_242 Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1317))) (let ((.cse1 (select .cse3 c_~f~0.base))) (let ((.cse0 (select .cse1 (+ c_~f~0.offset (* v_~counter~0_242 4)))) (.cse2 (select (select .cse3 ~f_inv~0.base) (+ (* c_~counter~0 4) c_~f_inv~0.offset)))) (or (= .cse0 0) (< v_~counter~0_242 0) (<= c_~n_inv~0 .cse0) (not (= (select .cse1 (+ c_~f~0.offset (* .cse2 4))) c_~counter~0)) (< .cse0 0) (< .cse2 0) (<= c_~n~0 v_~counter~0_242) (<= c_~n~0 .cse2)))))) is different from false [2023-08-30 20:15:44,996 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:15:44,997 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 223 treesize of output 151 [2023-08-30 20:15:45,132 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:15:45,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 8414 treesize of output 7931 [2023-08-30 20:15:45,666 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:15:45,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 2330 treesize of output 2205 [2023-08-30 20:15:45,964 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:15:45,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 1829 treesize of output 1845 [2023-08-30 20:15:46,294 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:15:46,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 2016 treesize of output 1611 Killed by 15